[Csnd] connection between amplitude, loudness and frequency

[Csnd] connection between amplitude, loudness and frequency

Date	2021-03-14 11:25
From	Stefan Thomas
Subject	[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 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

Date	2021-03-14 11:41
From	Victor Lazzarini
Subject	Re: [Csnd] [EXTERNAL] [Csnd] connection between amplitude, loudness and frequency
	Look at this https://en.wikipedia.org/wiki/Equal-loudness_contour https://en.wikipedia.org/wiki/A-weighting https://en.wikipedia.org/wiki/Sone and https://csound.com/docs/manual/GENsone.html ======================== Prof. Victor Lazzarini Maynooth University Ireland > On 14 Mar 2021, at 11:25, Stefan Thomas wrote: > > WARNINGThis email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe. > 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 > 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 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

Date	2021-03-14 22:14
From	Stefan Thomas
Subject	Re: [Csnd] [EXTERNAL] [Csnd] connection between amplitude, loudness and frequency
	Dear Victor, thanks very much for Your links. I will study them. All the best, Stefan Am So., 14. März 2021 um 12:41 Uhr schrieb Victor Lazzarini <Victor.Lazzarini@mu.ie>: Look at this https://en.wikipedia.org/wiki/Equal-loudness_contour https://en.wikipedia.org/wiki/A-weighting https://en.wikipedia.org/wiki/Sone and https://csound.com/docs/manual/GENsone.html ======================== Prof. Victor Lazzarini Maynooth University Ireland > On 14 Mar 2021, at 11:25, Stefan Thomas <kontrapunktstefan@gmail.com> wrote: > > WARNINGThis email originated from outside of Maynooth University's Mail System. Do not reply, click links or open attachments unless you recognise the sender and know the content is safe. > 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 > 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 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 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

Date	2021-03-16 07:16
From	Stefan Thomas
Subject	Re: [Csnd] [EXTERNAL] [Csnd] connection between amplitude, loudness and frequency
	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

Date	2021-03-16 07:44
From	Victor Lazzarini
Subject	Re: [Csnd] [EXTERNAL] [Csnd] connection between amplitude, loudness and frequency
	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 On Mar 16, 2021, at 7:17 AM, Stefan Thomas <kontrapunktstefan@gmail.com> wrote: 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