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From: -hh <recscuba_google@huntzinger.com>
Newsgroups: comp.os.linux.advocacy
Subject: Re: GNU/Linux is the Empowerment of the PC. So What Do You Do?
Date: Thu, 11 Apr 2024 09:02:41 -0400
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On 4/10/24 8:52 PM, chrisv wrote:
> -hh wrote:
> 
>> It might have been worth spending that much ~20 years ago, but for most
>> of us, mere age has reduced our hearing range capability by quite a bit,
>> such that Billy Joel's "cheap pair o speakers" does well enough.
> 
> I disagree.  I've lost only one octave of the audible range.  I can
> still hear the other nine octaves fine.
> 

That's already a 10% loss .. that you know of.

Where it gets tricky is that the dB loss curve is stronger at higher 
frequencies, plus as one ages it gets steeper.

For example, at 2kHz, going from age 20 to 40 has roughly a -10dB loss, 
but at 8kHz for the same age increase, its a -20dB loss.  Call this the 
"stronger" element part.

When going onto the next 20 year increment (from age 40 to 60), 2kHz now 
has an additional -10dB loss (same "strength" as before), but 8kHz jumps 
to -40dB (thus, much "steeper").

Similarly, for 4kHz, the total loss at age 20 is -9dB, but by age 40 its 
-22dB (notionally, if it was a linear loss it should have been -18dB), 
and age 60 is -55dB ('linear' would have been -27dB)

Recalling that the dB scale is basically LOG(3), the ramifications of 
expecting a -18dB loss but getting -22dB means it is a 50% reduction.

-hh