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Microphone Polar Plot Sequence

This 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

This sequence measures the self noise of a condenser microphone, using a spectrum analysis step and a power sum calculation to derive an RMS rating for the unit under test. The sequence has several parts (some optional). The sequence intitally determines  whether or not you have a high enough signal (signal being your microphone’s self […]

Active Noise-Cancelling Headphone Battery Life Test

This 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

These 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

When measuring noise cancelling headphones there are three important pieces of data to generate. 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 feature. Lastly, Total Attenuation […]

Headphone Test Sequence

This 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 […]

Thiele-Small Parameters

Loudspeaker 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 […]

Advanced SoundCheck Training – June 1, 2015

We are excited to announce a 1-day SoundCheck® Advanced Training Seminar on Monday, June 1st 2015. This new training class covers a combination of advanced electroacoustics education and SoundCheck topics that are beyond the scope of our basic 2-day training course. It is of broad interest to most testing applications, although the open loop testing […]

Headphones and EN50332

This webinar discusses the setup and execution of the EN-50332 standard sequence package for SoundCheck.  This standard outlines procedures for measuring the maximum output of headphones and portable music players. Presented by Brian Fallon, Listen, Inc. Status: Recorded. Watch Webinar  

Impedance Measurement

In this webinar we demonstrate how impedance can be measured using both highly accurate dual channel methods and simpler single channel methods. The presentation discusses the different test methods and show how each can be set up using SoundCheck. In addition, a novel, patent pending, method of single channel measurement that offers similar accuracy to […]