To convert between decibels and sound pressure level, you can use the formula: SPL = 20 * log10(P/P0), where P is the sound pressure and P0 is the reference pressure of 20 micropascals. This formula assumes a linear relationship between dB and SPL, which is only accurate for small changes in sound pressure. For larger changes, a more complex formula that accounts for the non-linear nature of sound perception is needed.
Underwater acoustic units are used to measure and describe sound in water, while standard acoustic units are used for sound in air. The main difference between the two is the reference pressure used. Underwater acoustic units use a reference pressure of 1 microbar, while standard acoustic units use a reference pressure of 20 micropascals.
To convert between underwater acoustic units and standard acoustic units, you can use the formula: SPL (underwater) = SPL (standard) + 26.4 dB. This formula takes into account the difference in reference pressures and allows for easy comparison between sound levels in air and water.
Sound speed in water is directly proportional to temperature. As water temperature increases, so does the speed of sound. The exact relationship is dependent on salinity and pressure, but as a general rule, sound speed increases by approximately 1.5 m/s for every 1 degree Celsius increase in temperature.
To convert between sound speed in water and sound speed in air, you can use the formula: c (water) = c (air) * (sqrt(rho (water) / rho (air))), where c is the speed of sound and rho is the density of the medium. This formula takes into account the difference in density between air and water and allows for easy conversion between the two mediums.