So a typical human equal loudness curve is somewhat That is applied to sound level meters to mimic (roughly) the response Is a decibel? The dBA weighting curve is the response of a filter (below) and to the dBA weighting curve given on What You might like to compare your curve to the standard equal loudness curves You can print this chartīy right clicking on the chart, by going to the 'file' menu of yourīrowser and clicking 'print', or you can print the screen electronically ('print screen' on a PC, Apple-shift-3 for Mac). Response of your sound card and headphones. The frequency response of your ears, it is modified by the frequency We repeat that, while this curve roughly approximates The chart will now show the sounds that you have chosen as havingĮqual loudness.Now find a sound at 1.5 kHz that equals the loudness of the 1 kHz.Do the same for 375, 250 Hz etc, all the way down to 30 Hz, at.Next find a sound at 500 Hz whose loudness equals that of your reference.Is by definition subjective, there is no person or machine that can To judge equal loudness for different pitches, but because loudness Keep doing this until you are satisfied that the theħ50 Hz and the 1 kHz sounds are equally loud. And if it isĮqually loud, leave it where it is.) Go back to your reference soundĪnd compare. Is louder, click on the panel below to make it softer. The panel that is 3 dB louder, still at 750 Hz. If you find that it is less loud than the reference sound, click on
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