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# Noise floor levels with different headphones - Page 2

Quote:

Wouldn't it just be a 1.4x increase in the pressure? And not volume? The actual volume gain would only be 1.2?

+3 dB = twice the power (Power).
+6 dB = twice the amplitude (Voltage and sound pressure).

Depends on which acoustic theory you consider, whether a doubling of level, or a doubling of pressure causes a doubling of loudness. If going by pressure, a 6db increase would be 2x, and 3db 1.4x.

The 10dB is a widely accepted belief of loudness (by experimentation), but the 6dB (pressure change) is a recently studied one.

Edited by proton007 - 1/19/14 at 10:24pm

Quote:
Originally Posted by proton007

+3 dB = twice the power (Power).
+6 dB = twice the amplitude (Voltage and sound pressure).

Depends on which acoustic theory you consider, whether a doubling of level, or a doubling of pressure causes a doubling of loudness. If going by pressure, a 6db increase would be 2x, and 3db 1.4x.

The 10dB is a widely accepted belief of loudness (by experimentation), but the 6dB (pressure change) is a recently studied one.

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