Technical Resources
With over 100 combined years of audio measurement experience, our team has created a wealth of technical papers, sequences, articles and other useful information to assist you with your audio test needs. Please browse the collection below, or filter by type of resource.
Hearing Protection Measurement
How do you measure hearing protection devices? In this short video, we demonstrate how to measure hearing protection using SoundCheck in accordance with the ANSI S3.19-1974 standard. You’ll see how to set up a head and torso simulator, calibrate the system, and perform repeated unoccluded and occluded measurements using pink noise to accurately calculate attenuation […]
Hearing Aid Measurement
How do you measure hearing aids? In this short video, we demonstrate how to test hearing aids using SoundCheck with standard ANSI S3.22 measurement techniques. You’ll see how to set up an anechoic test box and coupler, and configure SoundCheck for key measurements including frequency response, input/output linearity, OSPL 90, and release time. This method […]
Open Loop Test Measurement
How do you measure devices that can’t be directly connected to an audio interface? In this video, we demonstrate how to measure open loop devices such as smartphones and smart speakers using SoundCheck. You’ll learn how to generate a stimulus file, play it back from the device under test, and use triggered recording with a […]
Frequency Normalized Distortion – A Necessity for Modern Transducers
Frequency Normalized Distortion, or Normalized THD is a more accurate method for measuring distortion in transducers, and should be used alongside conventional THD measurements. Here’s the background from the creator of the original measurement. Full Article More about Frequency Normalized THD This article examines the limitations of conventional Total Harmonic Distortion (THD) calculations when evaluating […]
Frequency-Normalized THD Test Sequence
This sequence measures both conventional Total Harmonic Distortion (THD) and Normalized THD to provide a more accurate representation of a device’s nonlinear behavior. A stimulus is played through the device under test and recorded via a calibrated reference microphone and amplifier signal paths. Conventional THD compares each harmonic to the fundamental at the stimulus frequency, […]
Frequency Normalized Distortion Seminar
Recent transducer development, particularly piezo-MEMS loudspeakers, have brought renewed attention to Normalized Distortion (also known as Frequency Normalized Distortion), because it is essential to accurately characterize their behavior. Normalized Distortion is a measurement algorithm first proposed in a 1993 AES paper by Listen president Steve Temme during his time at Brüel & Kjær. Although it […]
How to Average Data in SoundCheck
Learn how to average measurement data the right way in SoundCheck. In this video, we’ll walk through curve averaging, averaging multiple curves, and waveform RMS calculations to get meaningful results from your data. Additional Resources for SoundCheck Detailed explanations of how to use SoundCheck can be found in the SoundCheck manual. Video Transcript: How […]
SoundCheck’s FFT Analyzer and RTA: Live or in a Sequence
Understand when to use SoundCheck’s FFT Analyzer and RTA live versus in a sequence. In this video, we’ll show how live multi-instrument FFT/RTA measurements are ideal for real-time adjustments and troubleshooting, while sequence-based analysis steps enable automated, repeatable measurements, averaging over time, and advanced calculations like frequency response. Additional Resources for SoundCheck Detailed explanations […]
