# Definitions for acoustic impedanceacous·tic im·ped·ance

### Princeton's WordNetRate this definition:0.0 / 0 votes

1. acoustic resistance, acoustic impedance, acoustic reactancenoun

opposition to the flow of sound through a surface; acoustic resistance is the real component of acoustic impedance and acoustic reactance is the imaginary component

### WikipediaRate this definition:0.0 / 0 votes

1. Acoustic impedance

Acoustic impedance and specific acoustic impedance are measures of the opposition that a system presents to the acoustic flow resulting from an acoustic pressure applied to the system. The SI unit of acoustic impedance is the pascal-second per cubic metre (Pa·s/m3), or in the MKS system the rayl per square metre (rayl/m2), while that of specific acoustic impedance is the pascal-second per metre (Pa·s/m), or in the MKS system the rayl. There is a close analogy with electrical impedance, which measures the opposition that a system presents to the electric current resulting from a voltage applied to the system.

### ChatGPTRate this definition:0.0 / 0 votes

1. acoustic impedance

Acoustic impedance is a measure of the resistance a system presents to the flow of acoustic energy. It is a complex physical quantity that is defined as the ratio of the sound pressure to the particle velocity at a particular point in a medium. This measure is used in physical acoustics and audio engineering to help analyze the behavior of sound waves in different materials and structures.

### WikidataRate this definition:5.0 / 1 vote

1. Acoustic impedance

Acoustic impedance indicates how much sound pressure is generated by the vibration of molecules of a particular acoustic medium at a given frequency. Acoustic impedance Z is frequency dependent. It is very useful, for example, for describing the behaviour of musical wind instruments. Mathematically, it is the sound pressure p divided by the particle velocity v and the surface area S, through which an acoustic wave of frequency f propagates. If the impedance is calculated for a range of excitation frequencies the result is an impedance curve. Planar, single-frequency traveling waves have acoustic impedances equal to the characteristic impedance divided by the surface area, where the characteristic impedance is the product of longitudinal wave velocity and density of the medium. Acoustic impedance can be expressed in either its constituent units or in rayls per square meter. Note that sometimes vS is referred to as the volume velocity. The specific acoustic impedance z is the ratio of sound pressure p to particle velocity v at a single frequency and is expressed in rayls. Therefore where D is the sound wave velocity.

### Numerology

1. Chaldean Numerology

The numerical value of acoustic impedance in Chaldean Numerology is: 1

2. Pythagorean Numerology

The numerical value of acoustic impedance in Pythagorean Numerology is: 8

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"acoustic impedance." Definitions.net. STANDS4 LLC, 2024. Web. 7 Sep. 2024. <https://www.definitions.net/definition/acoustic+impedance>.

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