Generally threshold of sound intensity for human is.
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The threshold of hearing is generally reported as the RMS sound pressure of 20 micropascals, corresponding to a sound intensity of 0.98 pW/m2 at 1 atmosphere and 25 °C.
The threshold of hearing is generally reported as the RMS sound pressure of 20 micropascals, corresponding to a sound intensity of 0.98 pW/m2 at 1 atmosphere and 25 °C.
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Sound intensity is the measurement of sound per unit area of the listener. This can be calculated using the standard formula and is said to be 0dB for humans at a frequency of 1000Hz. dB is the unit for the threshold of sound intensity which stands for ‘Decibel’.
This indicates that human hearing is highly sensitive. The actual average limit, however, is 4dB, but the standard threshold is taken as 0db for the threshold of sound intensity.
If you observe the frequency curve, you will see that the threshold changes with the frequency.
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