A 50 Hz source is perceived to be equally loud as a 1 kHz source at 20 dB when its intensity level is 50 dB higher than the 1 kHz source. What is the ratio of the intensities of these two equally loud sources?

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    $\begingroup$ Use the equal loudness curves (phon scale). $\endgroup$
    – march
    Jan 26 at 4:13
  • $\begingroup$ I don't think they need the Equal Loudness contours. The problem clearly states the relation between the two relations. All they have to do is just use the definition of the dB, which is itself the ratio of two values (with consistent dimensions of course). $\endgroup$
    – ZaellixA
    Jan 26 at 11:46


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