Pressure

Mean sound pressure level

Mean sound pressure level
  1. What do you mean by sound pressure level?
  2. What is a good sound pressure level?
  3. How do you calculate sound pressure level?
  4. What is the standard reference pressure for sound?

What do you mean by sound pressure level?

Sound pressure level (SPL) is the pressure level of a sound, measured in decibels (dB). ... Or, in other words is the ratio of the absolute sound pressure against a reference level of sound in the air.

What is a good sound pressure level?

For a normal human ear pain is experienced at a sound pressure of order 60 Pa or 6 10-4 atmospheres. Due to this range it is convenient to express sound pressure with a logarithmic decibel scale related typically to the lowest human hearable sound - 2 10-5 Pa or 0 dB.

How do you calculate sound pressure level?

Sound Pressure Level Formula = 20 log (p/po) where p is the sound pressure and po is the reference sound pressure of 0.00002 pascals = 0 dB the threshold of hearing at 1 kHz.
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Sound Pressure Terms and Definitions ...

Sources at 1 mSound PressureSPL re 20 μPa
TV studio0.0002 Pa20 dB
Reference sound pressure0.00002 Pa0 dB

What is the standard reference pressure for sound?

In air, the common reference is 20 μPa, because that is near the absolute threshold for a normal human listener for a sound frequency of 1,000 Hz. This level is called sound-pressure level (SPL).

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