Sound Spectrographic Analysis: Suggestions for Facilitating Auditory Imagery

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Abstract
Users of the sound spectrograph seem rarely to avail themselves of the refinements and new facilities introduced by manufacturers. By using a scale magnifier, frequency counter and log scale, sound spectrograms can be made to resemble simple musical notation in the pitch domain without forfeiting the strict objectivity of the analytical process. Such sound spectrograms facilitate auditory imagery and, at the same time, help non-specialists to a better understanding of published illustrations. There is a brief discussion of the relative merits of proportionate versus symbolic time representation, and a proposal that the addition of symbols illustrating relative loudness would help to restore information lost through reproduction [of bird vocalizations].

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