sound pressure
Noun 1. the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point (synonym) instantaneous sound pressure (hypernym) pressure, pressure level, force per unit area | ||||
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Sound pressure Definition from Language, Idioms & Slang Dictionaries & Glossaries
| hEnglish - advanced version |
sound pressure
sound pressure
n : the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point [syn: instantaneous sound pressure]
sound pressure
n : the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point [syn: instantaneous sound pressure]
Sound pressure Definition from Science & Technology Dictionaries & Glossaries
| RF Electronics |
Sound Pressure
Fluctuations in air pressure due to the presence of a sound. This sound pressure is expressed in units such as Pascals, microbars, or dynes/cm2.
Fluctuations in air pressure due to the presence of a sound. This sound pressure is expressed in units such as Pascals, microbars, or dynes/cm2.
Sound pressure Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Sound pressure
Sound pressure is the pressure deviation from the local ambient pressure caused by a sound wave. Sound pressure can be measured using a microphone in air and a hydrophone in water. The SI unit for sound pressure is the pascal (symbol: Pa). The instantaneous sound pressure is the deviation from the local ambient pressure p0 caused by a sound wave at a given location and given instant in time. The effective sound pressure is the root mean square of the instantaneous sound pressure over a given interval of time. In a sound wave, the complementary variable to sound pressure is the acoustic particle velocity. For small amplitudes, sound pressure and particle velocity are linearly related and their ratio is the acoustic impedance. The acoustic impedance depends on both the characteristics of the wave and the medium. The local instantaneous sound intensity is the product of the sound pressure and the acoustic particle velocity and is, therefore, a vector quantity.
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