Audio test applications are concerned with the quality of sound from devices including speakers, amplifiers, and microphones. Engineers perfrom linearity characterization, distortion measurements, sound quality analysis, rub and buzz, and others. Audio measurements are highly demanding, requiring high-quality signal acquisition, complex scaling, extensive analysis, and multiple graphical presentations.
Class D Amplifier Testing - AES17 Filters - Class D amplifiers are tested and validated like other types of amplifiers, however, a low pass filter for the high frequency switching components is often used on the output.
Electroacoustics 101 with SoundCheck - Covering electro-acoustic and audio electronics test including frequency response, phase, sensitivity, distortion, directivity, impedance, rub and buzz, and Thiele-Small parameters
These products and solutions from National Instruments partners and integrators provide out-of-the-box applications for automated audio test.
AudioMASTER by microLEX - Automated analysis and test of audio components such as hearing aids, headsets, telephones, and other transducers with a simple task-oriented user interface
SoundCheck by Listen, Inc. - A flexible software-based audio test system, including a spectrum analyzer, real-time analyzer, signal generator, multimeter, and oscilloscope
Legal This tutorial (this "tutorial") was developed by National Instruments ("NI"). Although technical support of this tutorial may be made available by National Instruments, the content in this tutorial may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this content with each new revision of related products and drivers. THIS TUTORIAL IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).
Print
