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A New Method for the Determination of the Acoustic Center of Acoustic Transducers

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Abstract:

The concept of acoustic center is important in practical realization of free-field reciprocity calibration of microphones. The accuracy in the position of the acoustic center has a significant influence on the accuracy of the estimated free-field sensitivity of the microphones. The last experimental methods used for half inch microphones allows to obtain results only from 2 kHz (the current lower frequency limit). In order to broaden this frequency range (in the lowest frequency domain, from nearly 2 kHz to 400 Hz), an improved experimental method which increases the signal to noise ratio is presented here. Thus, today, experimental results, which are based on the inversely proportional distance law, are available from 400 Hz to 20 or 30 kHz.

Document Type: Research Article

DOI: https://doi.org/10.3813/AAA.918279

Publication date: 2010-03-01

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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