A vessel may not be operated on Washington waters if, when measured from the shore, it produces a noise level over 75 decibels.
75
The decibel.
Decibel (dB) * The Bel is the primary unit. However, the scale is too large. So for human hearing, we use the deciBel, where each deciBel is 1/10 of a Bel. this is abbreviated dB.
Decibel is a measurement of loudness.
All sound output can and is measured in dB (decibel's)
Weight is measured in kilos, liquid is measured in litres and sound is measured in decibels.
The loudness of the radio was measured at a high decibel level by the council authorities.
Sound is measured in decibels. A decibel is 10logPower Out/Power In.
A: Dbm or decibel of modulation
The loudness of sound is measured using the "decibel" or "bel" unit.
Sound is measured in decibels by a sound pressure level meter (SPL-meter).
All I can think of that you might be asking is what is it measured in, and that would be the unit of the decibel (dB)