The curve that relates perceived loudness to frequency is the 
Fletcher-Munson curve.

Another curve I'm particularly interested in relates amplitude to perceived 
loudness: the sone curve.

Looking it up in my old Music360 manual, I found (recalled) it was GEN13 
there. A pity that routine didn't make it into Csound. I used it regularly, 
and continue to do so by approximating it with GEN16. This is the table I 
read:
f1 0 512 16 1 511 2.2 1000

Art Hunkins

----- Original Message ----- 
From: "Chuckk Hubbard" 
To: 
Sent: Thursday, December 04, 2008 10:24 AM
Subject: [Csnd] Re: Re: Re: Re: Re: low frequency oscilators


> On Thu, Dec 4, 2008 at 12:37 AM, Richard Dobson
>  wrote:
>> Andres Cabrera wrote:
>>>
>>> Hi,
>>>
>>> Also be aware that ears are not linear in their relation of amplitude
>>> and frecuency, i.e. different frequencies at the same amplitude will
>>> be heard at different loudness.
>>>
>>
>> And further, that  the same tone at different loudnesses  will be heard 
>> at
>> different pitches, e.g. louder-->flatter, quieter-->sharper.
>>
>> Richard Dobson
>
>
> I've heard this in reference to the extremes, towards the higher and
> lower ends of the audible spectrum; I forget the name given to it, but
> I've verified it myself with several-kHz tones, changing the amplitude
> and hearing a pitch change.  I'm not sure how strong it is in the
> mid-range, I can't detect it so much.
>
> -Chuckk
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
> csound" 

Everything from Barry Vercoe's Music360 should have made it to Csound?
Curious.
Maybe it can be resurrected?

-dB
On Dec 4, 2008, at 11:56 AM, Art Hunkins wrote:

> The curve that relates perceived loudness to frequency is the  
> Fletcher-Munson curve.
>
> Another curve I'm particularly interested in relates amplitude to  
> perceived loudness: the sone curve.
>
> Looking it up in my old Music360 manual, I found (recalled) it was  
> GEN13 there. A pity that routine didn't make it into Csound. I used  
> it regularly, and continue to do so by approximating it with GEN16.  
> This is the table I read:
> f1 0 512 16 1 511 2.2 1000
>
> Art Hunkins
>
> ----- Original Message ----- From: "Chuckk Hubbard"  >
> To: 
> Sent: Thursday, December 04, 2008 10:24 AM
> Subject: [Csnd] Re: Re: Re: Re: Re: low frequency oscilators
>
>
>> On Thu, Dec 4, 2008 at 12:37 AM, Richard Dobson
>>  wrote:
>>> Andres Cabrera wrote:
>>>>
>>>> Hi,
>>>>
>>>> Also be aware that ears are not linear in their relation of  
>>>> amplitude
>>>> and frecuency, i.e. different frequencies at the same amplitude  
>>>> will
>>>> be heard at different loudness.
>>>>
>>>
>>> And further, that  the same tone at different loudnesses  will be  
>>> heard at
>>> different pitches, e.g. louder-->flatter, quieter-->sharper.
>>>
>>> Richard Dobson
>>
>>
>> I've heard this in reference to the extremes, towards the higher and
>> lower ends of the audible spectrum; I forget the name given to it,  
>> but
>> I've verified it myself with several-kHz tones, changing the  
>> amplitude
>> and hearing a pitch change.  I'm not sure how strong it is in the
>> mid-range, I can't detect it so much.
>>
>> -Chuckk
>>
>>
>> Send bugs reports to this list.
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
>> "unsubscribe csound"
>
>
>
> Send bugs reports to this list.
> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
> "unsubscribe csound"