SoundCheck Sequences

Loudspeakers

Loudspeaker Splice Measurement Sequence - a sequence to measure the near and far field response of a sealed loudspeaker and splice the two together to simulate a free field measurement.   FREE.

Ported Loudspeaker Splice Measurement Sequence - a sequence to measure the near and far field response of a loudspeaker and splice the two together to simulate a free field measurement. Suitable for ported as well as sealed loudspeakers. Updated for SoundCheck 8.0.   FREE.

CLEAR^TM Perceptual Rub & Buzz Measurement (Note: SoundCheck 9.1 with CLEAR^TM Module enabled is required) - a sequence that enables you to try out the new CLEAR algorithm and compare the results to your ears! In addition to being able to test your own speakers using this new method, the sequence also includes saved data that can be loaded from disk. This means that if you don't have a speaker handy you can still listen to the wav. file and see how SoundCheck displays the data.  FREE.

Thiele-Small Parameters
Loudspeaker system performance can be quantitatively related to a set of electro-mechanical parameters known as Thiele-Small parameters. Tthese have become standards in the industry, and are used by loudspeaker designers worldwide. Three sequences are available for the purpose of measuring Thiele-Small Parameters, one sequence for each of the following methods: Added Mass, Known Volume, Known Driver Mass. 

Headphones

Headphone Test Sequence - a sequence to measure the performance of headphones.   FREE.

Noise-Cancelling Headphone Test Sequence - a sequence to measure the performance of noise-cancelling headphones.   FREE.

Microphones

Microphone Self-Noise Meaurement Sequence - a sequence to measure the self noise of a condenser microphone using the spectrum analysis step and a power sum calculation to derive an RMS rating for the unit under test.   FREE.

Microphone Polar Plot Sequence - A sequence to measure the directional response of a microphone and graphs the result as a polar plot. The final display also contains a graph of the directivity index in decibels versus frequency. FREE

Telephones

This test sequence implements all the electroacoustic tests required by TIA-470.110-C, outputting the results as a report or writing to a database. Future releases of this sequence are planned to cover headset and speakerphone testing, and will be developed when the relevant subsections of TIA-470 are approved. The test sequence contains all the major clauses of TIA470C, and also includes calibration sequences and subsequences. The test sequences can be used as they are to test to the standard, or modified by the user for custom in-house tests based on the standard. AVAILABLE FOR PURCHASE.

A comprehensive US standard for measuring narrowband digital phones. Handset, headset and speakerphone functions are all included. The standards apply to VoIP phones, as well as USB audio devices such as headsets, speakerphone attachments, and webcams.  The module is a large structured set of sequences and subsequences which perform all the measurements. Curves and values are shown on the screen, tolerance checks are performed, and data is saved to Excel spreadsheet files. Completely prompted sequences for calibration of all the transducers are included. After a one-time setup with a Sound card and other user-specific interfaces, the sequences are automatic. They run by simply selecting, pressing start, and following prompts where user interaction with the device under test is required. The sequence works with approved sound cards for connection to the transducers. Windows audio devices such as USB headsets work directly with SoundCheck. VoIP softphones also work with SoundCheck, by means of a recommended third-party Windows audio application. AVAILABLE FOR PURCHASE.

A comprehensive US standard for measuring wideband digital phones. Handset, headset and speakerphone functions are all included. The standards apply to VoIP phones, as well as USB audio devices such as headsets, speakerphone attachments, and webcams.  The module is a large structured set of sequences and subsequences which perform all the measurements. Curves and values are shown on the screen, tolerance checks are performed, and data is saved to Excel spreadsheet files. Completely prompted sequences for calibration of all the transducers are included. After a one-time setup with a Sound card and other user-specific interfaces, the sequences are automatic. They run by simply selecting, pressing start, and following prompts where user interaction with the device under test is required. The sequence works with approved sound cards for connection to the transducers. Windows audio devices such as USB headsets work directly with SoundCheck. VoIP softphones also work with SoundCheck, by means of a recommended third-party Windows audio application. AVAILABLE FOR PURCHASE.

This set of application sequences measures various switching time parameters on speakerphones. With an appropriate interface between the phone and the sound card, the sequences can be used with either analog or digital telephones.  The measurements generally follow IEEE 1329-1999, Clause 10 “Voice switching measurements.”  Since this is a measurement standard, not a performance specification, there are no limits or pass/fail criteria included. User-defined pass/fail limits can be added using standard SoundCheck tools. Completely prompted sequences for calibration of all the transducers are included. After a one-time setup with a Sound card and other user-specific interfaces, the sequences are automatic. They run by simply selecting, pressing start, and following prompts where user interaction with the device under test is required. AVAILABLE FOR PURCHASE.

Listen has released two new test sequences for testing 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. These pre-written sequences enable the user to immediately test to the relevant standards, and can be fully modified to meet any custom testing needs if desired. AVAILABLE FOR PURCHASE.

Hearing Aids

Hearing Aid Standard Test Sequences (part number 3001)
The Hearing Aid Standard suite of sequences contains all the major tests from ANSI S3.22 and IEC 60318-7, as well as some of the additional ‘Annex C’ sequences from the 2003 ANSI standard. Each test, as outlined in the standards, is contained in a single test sequence.  These sequences can each be run independently. There are also several full test sequences, which call up the required individual tests to run a complete standard test suite. AVAILABLE FOR PURCHASE.

Portable Audio (MP3 Players)

Measuring SPL of Portable Audio Devices (e.g. MP3 Players) to EN 50322-1 - a sequence for measuring the maximum sound pressure level for portable music players and the earphones/headphones they are bundled with to the British standard EN50322-1. AVAILABLE FOR PURCHASE.

General

Product Sorting - a sequence that demonstrates how sequence logic can be used to divide production lots into groups based on certain criteria, for example for grading products or for pairing microphones, earphones, or loudspeakers for stereo applications. The example sequence tests a unit's 1 kHz sensitivity and displays it as being in 'Group A', 'Group B', or a failure. This sequence can be used as a starting point for creating your own sequence by changing the test details and sorting criteria to meet your needs. FREE.

THD using 3rd Octave Noise - A test sequence which demonstrates a procedure to measure Total Harmonic Distortion (THD) using a band-limited pseudo-random noise stimulus. This is useful for measuring harmonic distortion on devices that do not efficiently transmit sine waves such as: VoIP phones, Bluetooth audio devices, and other audio products that heavily use DSP. The general procedure for this test is outlined in IEEE 269, Annex J, part J.3.

Frequency Response with P50 Speech - Modern audio devices such as cell phones, headsets, and VoIP phones often contain a significant amount of on-board processing. This makes it challenging to test them with traditional methods such as sine-based stimuli. Often it is desirable or necessary to use stimulus signals that present the device under test with a waveform that is more representative of real-life use such as real or artificial speech signals. This sequence demonstrates how to measure the frequency response of a device using P50 artificial speech as the stimulus signal. It takes advantage of the new RTA analysis option in SoundCheck to compensate for the response of the stimulus in order to isolate solely the frequency response of the device under test. The sequence is non-application specific and could be used with headsets, cell phones, VoIP phones, and more.

Excel Templates in Autosave (word document)- A 'How to' guide and sequence to demonstrate how to keep your data organized when you are running the same sequence repeatedly - includes customizing the layout of your data and creating your own additional worksheets with extra data like graphs, statistics, or summaries. 

Using Virtual Instruments - A sequence on using virtual instruments in SoundCheck. The sequence provides examples of how virtual instruments can be used in acquisition steps rather than in a typical stimulus plus Play & Record combination.