acoustic impedance

American  

noun

Acoustics.

1. the total reaction of a medium to the transmission of sound through it, expressed as the ratio of sound pressure to particle velocity at a given point in the medium.

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Example Sentences

Note that the acoustic impedances for soft tissue do not vary much but that there is a big difference between the acoustic impedance of soft tissue and air and also between soft tissue and bone.

From Textbooks • Aug. 12, 2015

Reflections at boundaries between two different media occur because of differences in a characteristic known as the acoustic impedance Z of each substance.

From Textbooks • Aug. 12, 2015

The greater the difference in acoustic impedance between the two media, the greater the reflection and the smaller the transmission.

From Textbooks • Aug. 12, 2015

While employed as a research engineer for Bell Telephone Laboratories in Murray Hill, N.J., he helped develop a talking typewriter and wrote papers on room acoustics, sound absorption and acoustic impedance.

From New York Times • Jan. 9, 2011