Acoustic admittance

Acoustic admittance is the measure of the flow of acoustic energy. It is measured in cubic meters per second (m3/s), per pascal (Pa).[1] By nature, acoustic impedance is the reciprocal of acoustic admittance. Immittance is a concept which combines both acoustic admittance and acoustic impedance.

Acoustic admittance
Common symbols
Yf
Other units
(m3/s)/Pa[1]

Acoustic admittance is widely used in bioacoustics where immittance is indispensable for its ability to assist with differential diagnosis of middle ear disease using tympanometry.[2] Acoustic admittance also has applications in construction and engineering, and has been utilized to research and develop an open-cell polyurethane foam that had mean pore sizes of 0.01 - 0.08 cm and a fibrous structure.[3]

References
  1. Damico, Jack S.; Ball, Martin J. (2019). The SAGE Encyclopedia of Human Communication Sciences and Disorders. SAGE Publications, Inc. doi:10.4135/9781483380810. ISBN 978-1-4833-8083-4.
  2. Lilly, David (April 20, 2005). "The Evolution of Aural Acoustic-Immittance Measurements". The ASHA Leader. 10 (5): 6–24. doi:10.1044/leader.FTR2.10052005.6. ISSN 1085-9586.
  3. Lambert, Robert F. (April 1, 1983). "Surface acoustic admittance of highly porous open‐cell, elastic foams" (PDF). pubs.aip.org. ISSN 0001-4966. Retrieved May 20, 2023.
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