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 In the 750 Hz column, click the panel next to your reference panel. Have made a choice, this becomes your reference sound. Notice that theĭB level chosen is now recorded at the bottom of the chart. If necessary until these conditions are satisfied. It and check that (i) it is not uncomfortably loud and (ii) it isĬonsiderably louder than the background noise.
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