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The volume of sound is measured in decibel (dB), which are a measure of air pressure. Sound pressure level (SPL) or sound level Lp is a logarithmic measure of the effective sound pressure of a sound relative to a reference value.
- The sound intensity is $I = \xi^2 \omega^2 c \rho$ where $\xi$ is the particle displacement, $\omega$ the frequency, $c$ the speed of sound and $\...
- The "volume of sound" is usually measured as sound pressure level (SPL), which is a measure of air pressure, in decibel (dB) units: Sound pressure...
- Propagation speed in an ideal gas varies as the square root of pressure . It also depends on the adiabatic index, the density of the gas, and the t...
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At 0 °C (32 °F), the speed of sound in air is about 331 m/s (1,086 ft/s; 1,192 km/h; 740 mph; 643 kn). The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in ordinary air, deviating slightly from ideal behavior.
Feb 24, 2022 · If you double the pressure you put on a sample of air (as long as you don't let its temperature change), you double its density and therefore leave the speed of sound unchanged. Note that this applies to any one gas.
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