All Test Sequences
These SoundCheck test sequences form a convenient starting point for many common tests, and can easily be adapted for your specific requirements. Most can be downloaded free of charge, but a few for testing to specific standards are for-purchase.
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Loudspeaker Test Sequences
Polar Plot (MDT-4000 Turntable) Sequence
/in Free Loudspeaker Sequences /by Devin VaillancourtThis sequence measures the polar response of a loudspeaker in both the vertical and horizontal dimensions. It is designed to work with the Portland Tool & Die MDT-4000 turntable, and has all the necessary commands to automatically rotate it via RS-232. The sequence uses a log sweep stimulus with the Time Selective Response algorithm so […]
Loose Particles Sequence
/in Free Loudspeaker Sequences /by Devin VaillancourtThis sequence demonstrates how to use SoundCheck to detect loose particle defects in loudspeakers. Loose particles typically reveal themselves as randomly spaced impulses, so they may not be detected when performing frequency based measurements such as THD, even though they can be clearly heard as undesirable artifacts. The loose particle algorithm, which is an available […]
Complete Test Sequence
/in Free Loudspeaker Sequences /by Devin VaillancourtThe purpose of this sequence is to perform a full suite of basic measurements for a loudspeaker. A 500 mV stepped sine sweep from 20 kHz to 50 Hz is played through the speaker and measured via two channels of the audio interface. A calibrated reference microphone is connected to one of the channels, and […]
Measuring Loudspeaker Maximum Linear Sound Levels Using Noise to the AES75-2022 Standard
/in Free Loudspeaker Sequences /by Devin VaillancourtThe AES75-2022 standard details a procedure for measuring maximum linear sound levels of a loudspeaker system or driver using a test signal called M-Noise. This is a complex procedure with many repetitive steps, which makes it time consuming to implement manually. This sequence automates the entire process, accelerating test time, minimizing operator intervention, and ensuring […]
Polar Plot (Linear X Turntable) Loudspeaker Sequence
/in Free Loudspeaker Sequences, Uncategorized /by Devin VaillancourtThis sequence measures the polar response of a loudspeaker in both the vertical and horizontal dimensions. It is designed to work with the Linear X turntable, and has all the necessary commands to automatically rotate it via RS-232. The sequence uses a log sweep stimulus with the Time Selective Response algorithm so that the measurements […]
Time Selective Response Sequence
/in Free Loudspeaker Sequences, Uncategorized /by Devin VaillancourtThis sequence demonstrates the capabilities of the TSR (Time Selective Response) algorithm in SoundCheck. Using TSR with a log sweep is a very fast and effective method for measuring frequency response and THD of a speaker in a non-anechoic environment. This example plays a quick log sweep from 20 Hz to 20 kHz. An analysis […]
Enhanced Perceptual Rub & Buzz Demo Sequence
/in Free Loudspeaker Sequences /by ZarinaThis sequence demonstrates how SC20’s new enhanced Perceptual Rub & Buzz algorithm compares to normalized Rub & Buzz and subjective listening. Running this sequence on a batch of good and bad buzzing loudspeakers should help identify by measurement, audibly defective units and where to set production limits. Starting the sequence, the user is asked at […]
Complete End-of-Line Speaker Test (includes ePRB)
/in Free Loudspeaker Sequences /by ZarinaThis sequence is an example of the many types of tests that can be performed quickly and simultaneously on a loudspeaker production line. It includes perceptual distortion measurement with the new enhanced Perceptual Rub & Buzz algorithm. A stepped sine sweep (StweepTM) from 20 kHz to 50 Hz is played through the speaker and measured […]
RT60 Room Acoustics
/in Free Loudspeaker Sequences /by ZarinaThe RT60 room acoustics sequence measures reverberation time and clarity of a room using multiple microphones to accurately characterize measurement environments. This is important for smart device testing as measurements of both speech recognition and audio output often need to be made in fully characterized rooms with known reverberation times and clarity. The method used […]
Measurement of Stereo Soundfield Parameters
/in For Purchase Loudspeaker Sequences /by ZarinaThe stereo soundfield sequence measures parameters such as Interaural level difference (ILD) and interaural cross-correlation (IACC) using a Head and Torso Simulator (HATS). The spectrum is measured at each ear and calculates interaural level differences (ILD), spectral balance, delay differences, and interaural cross-correlation (IACC). The measurements are made using different time windows, so that the […]
Anechoic Response of a Loudspeaker Without an Anechoic Chamber: Splice Sequence
/in Free Loudspeaker Sequences /by ZarinaThis sequence measures the anechoic response of a loudspeaker in an ordinary room using both a near field and time-windowed far field measurement “spliced” together to cover the full bandwidth of the loudspeaker’s response from 20 Hz to 40 kHz. First, the microphone is placed very close to the low frequency driver (less than an inch […]
Triggered Record Using Chirp Trigger and WAV File (Version 17 and later)
/in Free Audio Electronic Sequences, Free Generic Test Sequences, Free Loudspeaker Sequences, Free Smart Speaker Sequences, Free Smartphone And Tablet Sequences, Uncategorized /by ZarinaThis test sequence demonstrates SoundCheck’s Triggered Record – Chirp Trigger function for open loop testing of devices without analog inputs such as smart speakers, wearables, smart home devices, tablets and cellphones. A stimulus WAV file is created in SoundCheck and transferred to the device under test, where it is played back and the response recorded […]
Measuring Max SPL versus Frequency
/in Free Generic Test Sequences, Free Headphone & Headset Sequences, Free Loudspeaker Sequences /by ZarinaThis sequence measures the Max SPL of a transducer versus frequency that a device can play back with acceptable distortion. It is particularly valuable for designers using DSP algorithms to optimize the performance of their speakers. It characterizes the Max SPL of a transducer by setting limits on specific metrics (THD, Rub & Buzz, Perceptual […]
Triggered Record Using WAV File (Version 16.1 and later)
/in Free Audio Electronic Sequences, Free Loudspeaker Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis sequence allows you to test devices without an analog input such as smart speakers, tablets, cellphones and MP3 players using SoundCheck’s frequency-based trigger functionality. This method offers improved accuracy over previous level-based triggering, especially in noisy environments. A stimulus WAV file is created in SoundCheck, and copied to the device under test, where it […]
Smart Speaker – Embedded Microphone Test Sequence
/in Free Loudspeaker Sequences, Free Microphone Sequences, Free Smart Speaker Sequences /by ZarinaThis sequence demonstrates a method by which SoundCheck can measure the performance of a microphone embedded in a so-called “smart speaker”. This example assumes that the DUT is an Amazon Echo but it can be adapted for use with virtually any other type of smart speaker by substituting the Echo’s voice activation phrase WAV file […]
Smart Speaker – Embedded Loudspeaker Test Sequence
/in Free Loudspeaker Sequences, Free Smart Speaker Sequences /by ZarinaThis sequence demonstrates a method by which SoundCheck can measure the performance of a loudspeaker embedded in a so-called “smart speaker”. This example assumes that the DUT is an Amazon Echo but it can be adapted for use with virtually any other type of smart speaker by substituting the Echo’s voice activation phrase audio file […]
Comparison of Wired and Wireless (Bluetooth) Speaker Response
/in Free Loudspeaker Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis test sequence performs frequency response and distortion measurements of a Bluetooth speaker using both a wireless Bluetooth and wired stimuli; then compares the results. This sequence is configured for use with a Portland Tool & Die BTC-4149/4148 or BQC-4149/4148 Bluetooth interface. Initially, the sequence prompts the operator to turn on the Bluetooth device under […]
Triggered Record Using WAV File (Version 16.0 and earlier)
/in Free Audio Electronic Sequences, Free Loudspeaker Sequences /by ZarinaThis sequence allows you to test devices without an analog input such as tablets, cellphones and MP3 players. A stimulus WAV file is created in SoundCheck, and copied to the device under test, where it is played and the response recorded in SoundCheck as if the stimulus were played directly from SoundCheck. The stimulus WAV […]
Thiele-Small Parameters
/in Free, Free Loudspeaker Sequences /by ZarinaLoudspeaker system performance can be quantitatively related to a set of electro-mechanical parameters. These parameters are known in the industry as Thiele-Small parameters. They were first introduced by A.N.Thiele and Richard H.Small in a series of famous articles published in the 1971-72 Journal of AES (Audio Engineering Society). Over the years these parameters have become […]
Impedance Measurement – Dual Channel Method Using Math Post-Processing
/in Free, Free Loudspeaker Sequences /by ZarinaThis sequence demonstrates an alternative to the traditional SoundCheck single channel impedance measurement method. A stepped sine sweep from 20 Hz to 20 kHz is played through the speaker while the signal across the loudspeaker terminals is recorded by Direct In 1 and the signal across the sense resistor (impedance box) is recorded by Direct […]
Perceptual Rub & Buzz
/in Free, Free Loudspeaker Sequences /by ZarinaThis sequence uses the CLEAR algorithm for perceptual Rub & Buzz measurement to detect AUDIBLE Rub & Buzz. It uses a simplified auditory perceptual model to measure the loudness of Rub & Buzz distortion in phons rather than the more traditional dB SPL and % distortion units. These better identify whether distortion due to manufacturing […]
Impedance Measurement – Dual Channel Method Using Transfer Function
/in Free, Free Loudspeaker Sequences /by radarThis sequence demonstrates an alternative to the traditional SoundCheck single channel impedance measurement method. A pink noise stimulus (10Hz – 10kHz) is played through the speaker while the signal across the amplifier terminals is recorded by Direct In 1 and the signal across the sense resistor is recorded by Direct In 2. A transfer function […]
Headphone and Headset Test Sequences
Headphones Test Sequence
/in Free Headphone & Headset Sequences /by Devin VaillancourtThe purpose of this sequence is to test a stereo headphone. Both left and right earphones are measured simultaneously using a standard 1/12th Octave stepped-sine sweep from 20 Hz to 20 kHz. The analysis is then performed using Listen’s HarmonicTrak™ algorithm that measures harmonic distortion and fundamental frequency response simultaneously. Then the diffuse-field and free-field […]
Measuring Hearing Protection Devices to ANSI S3.19-1974 Standard
/in Free Headphone & Headset Sequences /by ZarinaThis sequence is used to measure the NRR, or Noise Reduction Rating, of a hearing protection device to the ANSI S3.19-1974 standard. NRR is a numerical representation of the sound attenuation of a device. The sequence first measures the response spectrum of the unoccluded hearing protector test fixture, then makes a second measurement with the […]
Prediction of Listener Preference of In-Ear Headphones (Harman Model)
/in Free Headphone & Headset Sequences /by ZarinaThis sequence, inspired by AES papers on statistical models to predict listener preference by Sean E. Olive, Todd Welti, and Omid Khonsaripour of Harman International, applies the Harman target curve for in-ear, on-ear and over-ear headphones to a measurement made in SoundCheck to yield the predicted user preference for the device under test. The measurements […]
Measuring Max SPL versus Frequency
/in Free Generic Test Sequences, Free Headphone & Headset Sequences, Free Loudspeaker Sequences /by ZarinaThis sequence measures the Max SPL of a transducer versus frequency that a device can play back with acceptable distortion. It is particularly valuable for designers using DSP algorithms to optimize the performance of their speakers. It characterizes the Max SPL of a transducer by setting limits on specific metrics (THD, Rub & Buzz, Perceptual […]
Bluetooth Headset Measurement
/in Free Headphone & Headset Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis sequence tests the send and receive performance of a stereo Bluetooth headset with a built-in microphone using a mixture of analog and digital channels. The left and right earphones are measured simultaneously with a stepped sweep from 20kHz to 20 Hz using two Bluetooth profiles: A2DP and HFP. The mic is measured with a […]
Lightning Headphone Test (Open Loop Test)
/in Free Headphone & Headset Sequences, Uncategorized /by ZarinaThis sequence tests a stereo headphone connected to a portable audio device such as a mobile phone or MP3 player. It is particularly useful for testing headphones with proprietary connectors such as the Lightning connector which otherwise can’t be tested in a conventional “closed loop” test configuration. The test stimulus is created in SoundCheck, saved […]
Headphone Testing with SoundCheck ONE
/in Free Headphone & Headset Sequences /by ZarinaThis SoundCheck ONE template sequence contains all the essential steps for basic headphone measurements using SoundCheck ONE and AudioConnectTM. The sequence can be easily customized and saved for specific products by turning individual measurements on and off, and by adjusting settings within each sequence step such as stimulus range and level, tolerance limits, graphical displays, […]
IEC-60268-7 Headphone Sequences
/in Free Headphone & Headset Sequences /by ZarinaIEC-60268-7: Sound System Equipment – Part 7: Headphones and Earphones is an international standard intended to characterize the performance of headphones and earphones. The standard itself is a lengthy document, 9 Sections and 3 Annexes covering 46 printed pages. These SoundCheck sequences focus on the electro-acoustic tests which are detailed in Section 8 “Characteristics to […]
Active Noise-Cancelling Headphone Battery Life Test
/in Free Headphone & Headset Sequences /by ZarinaThis sequence is designed to measure performance characteristics of Active Noise Cancelling (ANC) headphones while monitoring the DC voltage and current provided to the headphone by its batteries. The sequence first measures the passive attenuation of the headphone before moving into a loop. The loop plays a 2 minute pink noise stimulus at high output […]
EN-50332-2: Measuring SPL of Portable Devices
/in For Purchase, For Purchase Audio Electronic Sequences, For Purchase Headphone & Headset Sequences /by ZarinaThese two sequences follow the test standard detailed in EN50332-2 for measuring the maximum levels of portable music players and earphones/headphones. This section of the standard covers the individual testing of the devices rather than the combined testing that is detailed in part 1. Note that the physical setup and connections will be different between […]
Noise Cancelling Headphones
/in Free, Free Headphone & Headset Sequences /by ZarinaWhen measuring noise cancelling headphones there are three important pieces of data to collect. Passive Attenuation is the amount of noise that is reduced at the ear simply by the headphones being worn. Active Attenuation is the amount of noise that is further reduced by turning on the device’s active cancellation circuits. Lastly, Total Attenuation […]
Headphone Test Sequence
/in Free, Free Headphone & Headset Sequences /by ZarinaThis sequence performs a comprehensive headphone test on a stereo headphone. Both left and right earphones are measured simultaneously using a standard 1/12th Octave stepped-sine sweep from 20 to 20 kHz. The analysis is then performed using the HarmonicTrak™ algorithm that measures harmonic distortion and fundamental frequency response simultaneously, and the diffuse-field and free-field corrected […]
Microphone Test Sequences
Microphone Polar Plot Substitution Method Using Outline ET250-3D
/in Free Linear Motor Test Sequences, Free Microphone Sequences /by Devin VaillancourtThis sequence measures the directional response of a microphone and graphs the result as a polar plot. A log sweep stimulus is played from 100 Hz to 10 kHz at each angular increment, and the acquired waveform is analyzed using the Time Selective Response algorithm. This method allows the test to be performed in a […]
Measuring Digital MEMS Microphones – Frequency, Sensitivity, and Power Supply Rejection (PSR) Performance
/in Free Microphone Sequences /by Devin VaillancourtThis test suite contains 3 sequences to enable comprehensive testing of digital MEMS microphones: Measurement of frequency and sensitivity using a calibrated source Measurement of frequency using the ‘substitution method’, a solution for measuring frequency response where the source speaker cannot or is not equalized Measurement of power supply rejection (PSR) performance More
Microphone Acoustic Overload Point (AOP)
/in Free Microphone Sequences /by ZarinaThis sequence measures the acoustic overload point (AOP) of a microphone – the SPL required to produce 10% THD @ 1kHz from the microphone’s output. A 1 kHz amplitude sweep from a calibrated source speaker is applied across a range from 120 dB SPL to 135 dB SPL.The recorded time waveform is then analyzed using […]
Microphone SNR Measurement (Background Noise Method)
/in Free Microphone Sequences /by ZarinaThis sequence characterizes a microphone’s ability to passively and/or actively reject noise in the user’s environment. Unlike traditional microphone SNR measurements which calculate a ratio based upon a reference signal and the microphone’s noise floor, this method utilizes a signal (speech played from a mouth simulator) and noise (background noise played from two or more […]
Microphone Polar Plot: Substitution Method Using LinearX LT360 Turntable
/in Free Microphone Sequences /by ZarinaThis sequence measures the directional response of a microphone and graphs the result as a polar plot. A log sweep stimulus is played from 100 Hz to 10 kHz at each angular increment, and the acquired waveform is analyzed using the Time Selective Response algorithm. This method allows the test to be performed in a […]
Smart Speaker – Embedded Microphone Test Sequence
/in Free Loudspeaker Sequences, Free Microphone Sequences, Free Smart Speaker Sequences /by ZarinaThis sequence demonstrates a method by which SoundCheck can measure the performance of a microphone embedded in a so-called “smart speaker”. This example assumes that the DUT is an Amazon Echo but it can be adapted for use with virtually any other type of smart speaker by substituting the Echo’s voice activation phrase WAV file […]
Open Loop Microphone Testing
/in Free Microphone Sequences, Free Smartphone And Tablet Sequences /by ZarinaThis sequence demonstrates the two most common microphone measurements, frequency response and sensitivity, on a microphone embedded in a recording device. Typically, when measuring a microphone the response of the device can be captured simultaneously with the stimulus. However, with devices such as voice recorders and wireless telephone forming a closed loop can be cumbersome […]
Measuring Digital MEMS Microphones: Frequency, Sensitivity and Power Supply Rejection (PSR) Performance
/in Free Microphone Sequences /by ZarinaThis test suite contains 3 sequences to enable comprehensive testing of digital MEMS microphones. The first measures the frequency and sensitivity and displays two graphs: absolute level in dBFS, and the same response curve but normalized to 0 dB at 1 kHz. The second sequence uses the substitution method to test a digital MEMS microphone […]
Microphone Polar Plot Sequence
/in Free Microphone Sequences /by ZarinaThis sequence measures the directional response of a microphone and graphs the result as a polar plot. A log sweep stimulus is played from 100 Hz to 10 kHz at each angular increment, and the acquired waveform is analyzed using the Time Selective Response algorithm. This method allows the test to be performed in a […]
Microphone Self Noise Test
/in Free Microphone Sequences /by ZarinaThe purpose of this sequence is to measure the self noise of a condenser microphone. To do this we use the spectrum analysis step and a power sum calculation to derive an RMS rating for the unit under test. The sequence has several parts, a few of which are optional. The first section begins by […]
Telephone Test Sequences
Receive Loudness Rating with ITU Real Speech Test Sequence
/in Free Telephone Sequences /by Devin VaillancourtThe purpose of this sequence is to measure the Receive Loudness Rating (RLR) following the ITU-T P.79 standard using a Head and Torso Simulator (HATS). First, real speech from the ITU-T P.501 standard is sent to the Device Under Test (DUT) speaker by an electrical interface. The HATS right ear captures the DUT‟s speaker response. […]
Send Loudness Rating with ITU Real Speech Test Sequence
/in Free Telephone Sequences /by Devin VaillancourtThe purpose of this sequence is to measure the Send Loudness Rating (SLR) following the ITU-T P.79 standard. This sequence can be used with handsets, headsets, and conference call devices. First, real speech from the ITU-T P.501 standard is played out of a mouth simulator. The Device Under Test (DUT) microphone then captures the signal […]
TIA-5050 Test Sequence for Narrowband (NB) and Wideband (WB) Mobile Handset Phones
/in For Purchase Telephone Sequences /by ZarinaTIA 5050 is a US standard with measurement methods and requirements for the receive volume control performance of both narrowband (NB) and wideband (WB) mobile handset phones. The measurements include conversational gain, frequency response, and distortion. Measurements are made at both 2N and 8N handset application forces, with different requirements applied to each. Either Free […]
TIA-920-B Sequence for Measurement of Narrowband and Wideband Digital Phones
/in For Purchase Telephone Sequences, Uncategorized /by ZarinaThis sequence tests to TIA 920-B, a comprehensive US dual-bandwidth standard that applies to both narrowband (NB) and wideband (WB) devices. It also allows a choice between Free Field (FF) and Diffuse Field (DF) as the Listener Reference Point (LRP). The current release of this sequence measures digital communications devices with handset features, according to […]
Hearing Aid Compatibility to TIA 1083 and FCC Part 68.316
/in For Purchase Telephone Sequences /by ZarinaThese two test sequences are designed to test the hearing aid compatibility of a telephone according to the TIA 1083 and FCC Part 68.316 standards. These sequences, which rely on the user having radial and axial HAC probes, play the appropriate test signals, measure the response and compare them to the limits in the standard. […]
TIA-920-A Sequence for Wideband Digital Phones
/in For Purchase Telephone Sequences /by ZarinaThis sequence has been superseded by TIA 920-B test sequence. More
TIA-810-B Standard for Narrowband Digital Phones
/in For Purchase Telephone Sequences /by ZarinaThis sequence has been superseded by the TIA 920-B test sequence. More
Wireless (Bluetooth) Test Sequences
Triggered Record Using WAV File (Version 16.1 and later)
/in Free Audio Electronic Sequences, Free Loudspeaker Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis sequence allows you to test devices without an analog input such as smart speakers, tablets, cellphones and MP3 players using SoundCheck’s frequency-based trigger functionality. This method offers improved accuracy over previous level-based triggering, especially in noisy environments. A stimulus WAV file is created in SoundCheck, and copied to the device under test, where it […]
Bluetooth Headset Measurement
/in Free Headphone & Headset Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis sequence tests the send and receive performance of a stereo Bluetooth headset with a built-in microphone using a mixture of analog and digital channels. The left and right earphones are measured simultaneously with a stepped sweep from 20kHz to 20 Hz using two Bluetooth profiles: A2DP and HFP. The mic is measured with a […]
Comparison of Wired and Wireless (Bluetooth) Speaker Response
/in Free Loudspeaker Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis test sequence performs frequency response and distortion measurements of a Bluetooth speaker using both a wireless Bluetooth and wired stimuli; then compares the results. This sequence is configured for use with a Portland Tool & Die BTC-4149/4148 or BQC-4149/4148 Bluetooth interface. Initially, the sequence prompts the operator to turn on the Bluetooth device under […]
Automotive Test Sequences
In-Car Audio Measurements
/in Free Automotive Sequences /by Devin VaillancourtThis sequence tests the impulsive distortion, frequency response, and maximum sound pressure level of a vehicle infotainment system to the methods outlined in the Audio Engineering Society Technical Committee on Automotive Audio (TC-AA) in-vehicle measurements white paper. This white paper aims to define repeatable and defined car audio system measurements and in addition to the […]
Automotive Max SPL
/in Free Automotive Sequences /by ZarinaThe sequence measures the Max Sound Pressure Level (SPL) of a car infotainment system in the vehicle’s interior The sequence uses a 6 microphone array mounted at either the driver or passenger locations. A 30 second pink noise stimulus having an RMS level of -12 dBFS is played through the infotainment system and captured by […]
Triggered Record Using WAV File and 6 Mic Array
/in Free Automotive Sequences /by ZarinaThis sequence allows you to measure a playback system without analog inputs using a 6 microphone array. Specifically, the sequence is designed to measure an in-car audio system. A stimulus WAV file is created in SoundCheck and transferred to the device under test (DUT) where it is played back and the response captured by SoundCheck […]
Hearing Aid Test Sequences
Hearing Aid Frequency Response Test Sequence
/in Free Hearing Aid Sequences /by Devin VaillancourtThis sequence follows the ANSI S3.22-1996 standard method for testing the frequency response of a hearing aid. An equalized stepped sine sweep from 8 kHz – 200 Hz is played at a level of 60 dBSPL through the anechoic box speaker, and the output of the hearing aid is analyzed with the Heterodyne algorithm to […]
Hearing Aid OSPL 90 Test Sequence
/in Free Hearing Aid Sequences /by Devin VaillancourtThis sequence follows the ANSI S3.22-1996 standard method for measuring the OSPL curve, the HFA value, and the Max OSPL value for a hearing aid. An equalized stepped sine sweep from 8 kHz – 200 Hz is played at a level of 90 dBSPL through the anechoic box speaker, and a broadband response curve is […]
Release Time Hearing Aid Test Sequence
/in Free Hearing Aid Sequences /by Devin VaillancourtThis sequence follows the ANSI S3.22-1996 standard method for testing the release time of AGC (automatic gain control) hearing aids. A 2 kHz sine tone is played at 90 dBSPL for 1 second and then immediately drops to 55 dBSPL for 2 more seconds. A band limited time envelope (1.5-2.5 kHz) is created and then […]
AGC Hearing Aid – Reference Gain & EIN Test Sequence
/in Free Hearing Aid Sequences /by ZarinaThis sequence performs two of the measurements from the ANSI hearing aid test standard S3.22-1996. The first part, in accordance with section 6.7 of the standard, helps the user set the reference test gain for the hearing aid, which is used for multiple measurements in the standard. The second part, from section 6.12, tests the […]
ANSI S3.22 Hearing Aid Test Sequences
/in For Purchase Hearing Aid Sequences /by ZarinaThese sequences include all the tests from ANSI S3.22:2014 as well as some of the additional ‘Annex C’ tests from the 2014 ANSI standard. This guide describes the basic functionality of each sequence and details the process of hardware setup and calibration. Each test, as outlined in the standards, is contained in a single test […]
Smartphone and Tablet Test Sequences
Triggered Record Using Chirp Trigger and WAV File (Version 17 and later)
/in Free Audio Electronic Sequences, Free Generic Test Sequences, Free Loudspeaker Sequences, Free Smart Speaker Sequences, Free Smartphone And Tablet Sequences, Uncategorized /by ZarinaThis test sequence demonstrates SoundCheck’s Triggered Record – Chirp Trigger function for open loop testing of devices without analog inputs such as smart speakers, wearables, smart home devices, tablets and cellphones. A stimulus WAV file is created in SoundCheck and transferred to the device under test, where it is played back and the response recorded […]
Open Loop Microphone Testing
/in Free Microphone Sequences, Free Smartphone And Tablet Sequences /by ZarinaThis sequence demonstrates the two most common microphone measurements, frequency response and sensitivity, on a microphone embedded in a recording device. Typically, when measuring a microphone the response of the device can be captured simultaneously with the stimulus. However, with devices such as voice recorders and wireless telephone forming a closed loop can be cumbersome […]
Audio Electronic Test Sequences
Amplifier THD+N Sequence
/in Free Audio Electronic Sequences /by Devin VaillancourtThis sequence measures an audio amplifier’s Frequency Response, Gain, THD, THD+Noise, and Self-noise. It accomplishes this by playing a 1/3rd octave sine sweep through the amplifier. A HarmonicTrak™ analysis step calculates the fundamental frequency response curve as well as the distortion plots. The sequence then records and analyzes a spectrum of the amplifier’s self-noise. More
MP3 Player (Multitone) Sequence
/in Free Audio Electronic Sequences /by Devin VaillancourtThe principle is first to create a multitone stimulus waveform with SoundCheck and transfer it to the MP3 Player to be tested. This waveform is then played back, to be acquired and analyzed by SoundCheck. Both Left and Right channels are acquired at once. The acquisition is made easy by using a trigger on one […]
Triggered Record Using Chirp Trigger and WAV File (Version 17 and later)
/in Free Audio Electronic Sequences, Free Generic Test Sequences, Free Loudspeaker Sequences, Free Smart Speaker Sequences, Free Smartphone And Tablet Sequences, Uncategorized /by ZarinaThis test sequence demonstrates SoundCheck’s Triggered Record – Chirp Trigger function for open loop testing of devices without analog inputs such as smart speakers, wearables, smart home devices, tablets and cellphones. A stimulus WAV file is created in SoundCheck and transferred to the device under test, where it is played back and the response recorded […]
Triggered Record Using WAV File (Version 16.1 and later)
/in Free Audio Electronic Sequences, Free Loudspeaker Sequences, Free Wireless (Bluetooth) Sequences /by ZarinaThis sequence allows you to test devices without an analog input such as smart speakers, tablets, cellphones and MP3 players using SoundCheck’s frequency-based trigger functionality. This method offers improved accuracy over previous level-based triggering, especially in noisy environments. A stimulus WAV file is created in SoundCheck, and copied to the device under test, where it […]
Triggered Record Using WAV File (Version 16.0 and earlier)
/in Free Audio Electronic Sequences, Free Loudspeaker Sequences /by ZarinaThis sequence allows you to test devices without an analog input such as tablets, cellphones and MP3 players. A stimulus WAV file is created in SoundCheck, and copied to the device under test, where it is played and the response recorded in SoundCheck as if the stimulus were played directly from SoundCheck. The stimulus WAV […]
EN 50332-1 – Max. SPL of Portable Audio Devices
/in For Purchase Audio Electronic Sequences /by ZarinaThis sequence follows the test standard detailed in EN50332-1 (2013) for measuring the maximum sound pressure for portable music players and the earphones/headphones they are bundled with. The test involves loading a weighted pink noise stimulus file (as specified by IEC 268) onto the portable device and playing it through the earphones at the player’s […]
EN-50332-2: Measuring SPL of Portable Devices
/in For Purchase, For Purchase Audio Electronic Sequences, For Purchase Headphone & Headset Sequences /by ZarinaThese two sequences follow the test standard detailed in EN50332-2 for measuring the maximum levels of portable music players and earphones/headphones. This section of the standard covers the individual testing of the devices rather than the combined testing that is detailed in part 1. Note that the physical setup and connections will be different between […]
Linear Motor Test Sequences
Microphone Polar Plot Substitution Method Using Outline ET250-3D
/in Free Linear Motor Test Sequences, Free Microphone Sequences /by Devin VaillancourtThis sequence measures the directional response of a microphone and graphs the result as a polar plot. A log sweep stimulus is played from 100 Hz to 10 kHz at each angular increment, and the acquired waveform is analyzed using the Time Selective Response algorithm. This method allows the test to be performed in a […]
Linear Motor Test Sequence
/in Free Linear Motor Test Sequences /by ZarinaLinear motors (also known as linear vibrators or linear resonant actuators) have become increasingly popular in handheld devices such as phones and tablets for providing haptic feedback to the device’s user. The typical linear motor design uses a fixed voice coil in conjunction with a moving magnetic mass. A spring is placed between the mass […]
General (non-application-specific) Test Sequences
Comparison of Effect of Different Masks on Speech Distortion
/in Free Generic Test Sequences /by ZarinaThe purpose of this sequence is to compare the response of an artificial mouth when face masks of different construction are mounted on the mouth. The sequence assumes a lightweight disposable mask and a heavy multi-layer cloth mask. A stepped sinewave from 10 kHz – 100 Hz is played from the unoccluded mouth and the […]
Waveform Windowing
/in Free Generic Test Sequences /by ZarinaThis sequence demonstrates how SoundCheck’s Windowing post-processing function is applied to waveforms to remove measurement artifacts that might otherwise create false auto delay values and subsequent analysis errors. This sequence uses data from a customer who was measuring the directivity of a hearing aid-type device by mounting it on a rotating HATS and using a […]
External Control of SoundCheck via TCP/IP
/in Free Generic Test Sequences /by ZarinaTCP/IP control of SoundCheck provides a powerful and expandable command format for controlling and interacting with SoundCheck via any programming language (C#, C++, MATLAB, VB.net, LabVIEW, Python, etc.), on any operating system, either locally or through a network. This is valuable for anyone wishing to control SoundCheck from an external program, e.g. as part of an […]
Triggered Record Using Chirp Trigger and WAV File (Version 17 and later)
/in Free Audio Electronic Sequences, Free Generic Test Sequences, Free Loudspeaker Sequences, Free Smart Speaker Sequences, Free Smartphone And Tablet Sequences, Uncategorized /by ZarinaThis test sequence demonstrates SoundCheck’s Triggered Record – Chirp Trigger function for open loop testing of devices without analog inputs such as smart speakers, wearables, smart home devices, tablets and cellphones. A stimulus WAV file is created in SoundCheck and transferred to the device under test, where it is played back and the response recorded […]
Measuring Max SPL versus Frequency
/in Free Generic Test Sequences, Free Headphone & Headset Sequences, Free Loudspeaker Sequences /by ZarinaThis sequence measures the Max SPL of a transducer versus frequency that a device can play back with acceptable distortion. It is particularly valuable for designers using DSP algorithms to optimize the performance of their speakers. It characterizes the Max SPL of a transducer by setting limits on specific metrics (THD, Rub & Buzz, Perceptual […]
Background Noise Simulation to ETSI ES 202 396-1 Standard
/in For Purchase Generic Test Sequences /by ZarinaThis Background Noise Simulation sequence follows the ETSI ES 202 396-1 standard. It will automatically calibrate a standardized 4.1 speaker / subwoofer setup in accordance to the ETSI ES 202 396-1 standard “Loudspeaker Setup for Background Noise Simulation” and provide an equalized, calibrated playback solution to stress your device in a standardized and repeatable way. […]
