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Dr. Andrew Barnard demonstrates the principals of Anti-Aliasing and explains how high frequency microphone signals can become indistinguishable.
Array microphones are a cost effective method to take acoustic measurements in applications such as sound pressure mapping, beam-forming, holography, noise source location and machinery monitoring.
Learn how to identify the appropriate applications for 1/2" and 1/4" Condenser Microphones.
Learn about the logarithmic properties of sound and decibel addition from Dr. Andrew Barnard. Find out how this is used to assess and reduce noise.
Dr. Andrew Barnard demonstrates how Directivity patterns and theory is used for noise source location, beamforming, holography and sound power mapping. Directivity is used for of Acoustic product testing in the loud speaker, automotive and aerospace industries.
Test and measurement microphones are very delicate instruments. Learn how to protect and maintain your microphones by following these safe practices and maintenance recommendations.
When should Prepolarized microphones be used for acoustic test measurements?
Learn the differences between traditional, externally polarized microphones and new modern prepolarized microphones.
Dr. Andrew Barnard shows how use Noise floor calculations to when testing to discover sources of unwanted noise when designing products. This is typically used in testing for the automotive industry and computer components such as disk drives.
Probe Microphones are recommended for sound pressure measurements in confined areas and high temperature applications.
Learn about acoustics basics and terminology, particle motion vs. waveform propagation, sound fields and octave band analysis.
In Part 2 of this presentation, Dr. Walber covers methodologies for measuring sound, sound intensity measurements and ISO standards for sound power.
Surface Microphone are used to measure true surface pressure and noise. The surface microphone and pad design are optimized for confined spaces and to reduce wind induced noise during testing.
Dr. Andrew Barnard shows how to test materials for sound absorption and loss. Learn how choose the best materials for noise reduction. These techniques are used by automobile and aircraft manufacturers to reduce effect of sounds from outside sources such as wind and other noise.