Chapter | six
The dB Concept
CHAPTER OUTLINE
From dB to Power or Amplitude Ratio
When sound levels have to be specified, it is practical to do so in a manner that corresponds to the way in which the ear perceives them. Human hearing is approximately logarithmic with respect to the perception of both level and frequency. Logarithmic growth means that there is a constant proportion between the individual steps on the scale. For example, if 1 W is first imparted to a loudspeaker and then followed by 2 W, this will be experienced as a given step in perceived ...
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