Reply to thread

Message

<blockquote data-quote="Papermaker85" data-source="post: 8533197" data-attributes="member: 572595">kmsl. ok..VIA audioholics&quot;One oddity is that at the louder tones of 100 dB and 110 dB, the lower frequencies are better at masking high order harmonics than the higher frequency tones, but not the lower frequency harmonics. For example, at 110 dB, a 20 Hz tone will mask a 2nd harmonic up to 5% of the total output and a 100 Hz tone will mask a 2nd harmonic for up to 2.5%, but for the same loudness level, a 20 Hz tone will only mask a 5th harmonic up to 0.4% while the 100 Hz tone masks the 5th harmonic up to 0.9%. This is counterintuitive to what one would expect from viewing a equal loudness chart, as the steeper slope of human sensitivity at deep frequencies would seem to indicate that further harmonics would be especially audible. This effect is due to the fact that the measured harmonic bands of the lower frequencies are much narrower than the higher frequencies; the 5th harmonic of 10 Hz and 20 Hz is to 50 Hz and 100 Hz respectively, while for 50 Hz and 100 Hz it goes to 250 Hz and 500 Hz. However the masking band of frequencies below 300 Hz remains constant due to a characteristic in our hearing known as critical bands.&quot;</blockquote>

[QUOTE="Papermaker85, post: 8533197, member: 572595"] kmsl. ok.. VIA audioholics "One oddity is that at the louder tones of 100 dB and 110 dB, the lower frequencies are better at masking high order harmonics than the higher frequency tones, but not the lower frequency harmonics. For example, at 110 dB, a 20 Hz tone will mask a 2nd harmonic up to 5% of the total output and a 100 Hz tone will mask a 2nd harmonic for up to 2.5%, but for the same loudness level, a 20 Hz tone will only mask a 5th harmonic up to 0.4% while the 100 Hz tone masks the 5th harmonic up to 0.9%. This is counterintuitive to what one would expect from viewing a equal loudness chart, as the steeper slope of human sensitivity at deep frequencies would seem to indicate that further harmonics would be especially audible. This effect is due to the fact that the measured harmonic bands of the lower frequencies are much narrower than the higher frequencies; the 5th harmonic of 10 Hz and 20 Hz is to 50 Hz and 100 Hz respectively, while for 50 Hz and 100 Hz it goes to 250 Hz and 500 Hz. However the masking band of frequencies below 300 Hz remains constant due to a characteristic in our hearing known as critical bands." [/QUOTE]

Verification