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| Audio phase shift circuit design wanted. |
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| magic:
--- Quote from: Jim-0000 on July 10, 2019, 01:01:26 pm ---So, the phase shift (of 180 deg) will need to be adjustable for any frequency over the audible spectrum. --- End quote --- Then you simply want an inverting opamp stage. But as others pointed out, you can't cancel a signal that you can't measure in real time. |
| SiliconWizard:
What are still commonly used as a way of relief for tinnitus are masking signals. They are often some kind of broadband noise, such as filtered and/or modulated white noise. For those interested in knowing a bit more: http://www.tinnitusjournal.com/articles/use-of-masking-for-tinnitus.pdf ( https://www.tinnitus123.com/tinnitus-maskers/ ) |
| ogden:
--- Quote from: Jim-0000 on July 10, 2019, 01:01:26 pm ---I want to invert the phase of perceived (or actually heard) frequency of a Tinnitus sufferer. So, the phase shift (of 180 deg) will need to be adjustable for any frequency over the audible spectrum. --- End quote --- 180 degree phase shift for any frequency or just broadband noise is simple DSP task - invert polarity of waveform/signal. Problem in your case is - you do not have waveform nor signal to invert. Basically your idea of creating 180-degree phase shifted sound to cancel Tinnitus sufferer is impossible. If you say that it is possible then why don't you earn money winning lotteries and trading stocks? [edit] Audiogury pretty much explained why (it is not possible). |
| Audioguru:
I hate to hear acid rock or Rap because they are broadband noise. Instead of hearing noise to mask tinnitus then maybe good music would be better. |
| Jim-0000:
--- Quote from: SiliconWizard on July 11, 2019, 01:19:48 pm ---What are still commonly used as a way of relief for tinnitus are masking signals. They are often some kind of broadband noise, such as filtered and/or modulated white noise. For those interested in knowing a bit more: http://www.tinnitusjournal.com/articles/use-of-masking-for-tinnitus.pdf ( https://www.tinnitus123.com/tinnitus-maskers/ ) --- End quote --- Thanks for the reply. I will read the link. More later. Jim. |
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