[Csnd] connection between amplitude, loudness and frequency

Dear community,
as we all know, pitches with the same amplitude seem to be louder if the frequency is higher.
Can one say how much louder seems to by e.g. 880 Hz than e.g. 110 Hz with same amplitude, let’s say 0.5?
I would like to transfer this relations to an ftable.
Would You suggest to use decibel values or raw amplitudes for this purpose?
Thanks for Your help,

Stefan

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Look at this

and

https://csound.com/docs/manual/GENsone.html

Dear Victor,
thanks very much for Your links. I will study them.
All the best,
Stefan

Dear Victor, dear community,

I would like to ask a question concerning GENsone. I’ve read in the manual that the syntax of the opcode is

f # time size “sone” start end equalpoint rescale

There’s also an example for a ftable with this opcode:

f 2 0 16385 “sone” 0 32000 32000 0

I would like to what this value 32000 stands for. Is it a value for frequency? And is there a special reason for the value 16385 as the given size for the ftable?
Thanks for Your help!
Stefan

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

16385 is a table size 16384 with extended guard point (guard point that is an extension of the curve).

32000 is the max value of the interval (0,32000) in which this function is drawn, and 32000 is where input and output of the function are the same value.

The sone function as applied in the example maps an input amplitude to the SONE scale. The scale itself is not frequency dependent.

John wrote this GEN, he might know more.

Prof. Victor Lazzarini
Maynooth University
Ireland