cosine?
Sound is measured in decibels
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Sound is measured in decibels and is symbolized dB
sound is measured in decibles
A sound spectrogram measures the frequency and wavelengths of sound waves. The frequency is measured in Hertz and the wavelengths are measured in meters.
I=P/S P=SoundPower S=Surface [W/m^2]
Sound is measured in decibels, which are commonly shortened to "dBs".
There is really no standard distance from the sound source where the sound pressure level (SPL) is measured.
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Answer is by sound waves