Perceptual Loudness is the perceptual measurement of the loudness level of an audio signal being observed by a human, which is measured in Phon. It is of note that the perceived loudness of an audio signal is not solely dependent on the amplitude of the signal, but also highly dependent on the frequency of signal. For computational purposes, the calculation of the perceived loudness from the more analytical measurements of sound pressure level (dB) and frequency (Hz) is outlined in the International Standard ISO226:2003 [1]. This standard includes a formula for the calculation of perceived loudness based on 29 specified frequencies. An alternative method for the calculation of perceived loudness is proposed in this paper, incorporating the use of Artificial Neural Networks. The development of this A.N.N. implementation is also outlined, along with the benefits that this A.N.N. methodology has over the established methods.
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