db597
100+ Head-Fier
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I find it hard to believe anyone who here can hear above 20khz. You guys sure it's not a placebo effect?
Originally Posted by sonance Don't be too sure about hearing the higher frequencies with this test. This is an mp3 compressed 44.1 khz sampled file - it really should be sampled at 96khz to be a decent test. According to sampling theory, your need a sampling rate that's a minimum of 2x the frequency being sampled. That's a minimum. Higher is better. if you do the math 44.1 is not enough to even minimally cleanly capture a 25khz tone. You'd really need to generate the tone at 96khz, listen to it on a 96khz capable soundcard that doesnt downsaple (i.e. ASIO or Kernel streaming, and not via a creative audigy of any generation), headphones that extend above 20khz, and the rest of your audio chain would need to handle > 20khz as well. I can clearly hear all the mp3 tones posted here upto 25khz, listening at about 74db measured with a sound meter, but I'm not certain at all that these mp3s are actually playing back a clean 25khz tone. I will test later with a tone generator. |
Originally Posted by sonance Don't be too sure about hearing the higher frequencies with this test. This is an mp3 compressed 44.1 khz sampled file - it really should be sampled at 96khz to be a decent test. According to sampling theory, your need a sampling rate that's a minimum of 2x the frequency being sampled. That's a minimum. Higher is better. if you do the math 44.1 is not enough to even minimally cleanly capture a 25khz tone. You'd really need to generate the tone at 96khz, listen to it on a 96khz capable soundcard that doesnt downsaple (i.e. ASIO or Kernel streaming, and not via a creative audigy of any generation), headphones that extend above 20khz, and the rest of your audio chain would need to handle > 20khz as well. I can clearly hear all the mp3 tones posted here upto 25khz, listening at about 74db measured with a sound meter, but I'm not certain at all that these mp3s are actually playing back a clean 25khz tone. I will test later with a tone generator. |
Originally Posted by db597 I find it hard to believe anyone who here can hear above 20khz. You guys sure it's not a placebo effect? |
Originally Posted by 003 I can hear up to 21,000Hz. At 22,000Hz I can't hear anything. |