Re: [ARSCLIST] Dynamic-frequency Range

[Don Cox <doncox@xxxxxxxxxxxxxx>]

On 25/10/06, Steven C. Barr(x) wrote:
> ----- Original Message ----- 
> From: "Don Cox" <doncox@xxxxxxxxxxxxxx>
>> This is completely different from what I was suggesting. You need an
>> impulse signal such as the sharp click from a spark to derive a
>> function for deconvolution.
>> 
>> Simply comparing one tenor with another and adjusting some EQ is not
>> at all the same.
>> 
> I can see one place where this might break down. The various items
> which affect the accuracy of a recording (i.e. how close it is to the
> actual sound it supposedly represents) are, to a great extent,
> variable over the audio frequency spectrum. That is, the recording
> horn or microphone not only varies in sensitivity over the
> spectrum...in the case of an acoustic horn its shape and dimensions
> can actually emphasize some frequencies (which can include harmonics
> or frequencies produced by "audio heterodyning").
> 
> It might be possible to use a "perfect click" (a short-duration
> sample of "white noise" with all frequencies at equal amplitude)...
> but I would assume that if the sound duration was short enough 
> to be heard as a "click," it would represent only tiny fractions
> of lower frequencies?

An infinitely short impulse contains all frequencies. Consider the fact
that if it happens once in a week that is a frequency of one cycle per
week.

Regards
-- 
Don Cox
doncox@xxxxxxxxxxxxxx