Letter | Published:

Subjective Interpretation of Loudspeaker Frequency Response Curves in terms of Loudness

Nature volume 128, page 268 (15 August 1931) | Download Citation



In objective measurements of the overall response of sound reproducing systems, the need is continually felt of a method of interpreting them subjectively. We have found it possible, by utilising Kingsbury's scale of loudness and his measurements at different frequencies connecting the sensation level of a pure tone with its loudness,1 to derive loudness-frequency characteristics. By way of example, in Fig. 1, is shown a typical measured acoustical response curve for a high quality loudspeaker. This type of curve can refer to the loudspeaker when supplied with constant current or when associated with its amplifier, or to the overall response characteristic corrected for different factors such as the change in the polar distribution of radiation with frequency.

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  1. 1.

    , Phys. Review, 29, 588; 1927. Also "Speech and Hearing", by H. Fletcher, p. 230. Fig. 108.

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  1. Research Laboratories of the General Electric Company, Ltd., Wembley, July 15.

    • D. A. OLIVER


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