[78-L] Removing hiss^

[Julian Vein]

Steven C. Barr wrote:
> We can assume the outside groove of a 10" 78 is about 9.9" in diameter; its
> length (9.9 * pi) is a bit over 31 inches. This length must be traversed in 
> 1/78
> of a minute (.77 seconds), or a speed of 40.4 ips.Since one cycle of a 6KHz
> sound lasts .00167 seconds, its "waveform" on the record will be about 
> .0673"
> long. So...if the particles of "filler" which generate the typical "hiss" on 
> 78's are
> around .0673" across/in diameter, they will generate "noise" of c. 6KHz when
> the record is played. AFAIK, there is no practical way to tell the 
> difference
> between the groove path created by a 6KHz signal...and one caused by a
> "stray" particle of filler with a size identical to that signal...?!
> 
> Steven C. Barr 
> 
> _______________________________________________
What you are describing is an Algerhythm for removing Hiss!

      Julian Vein


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