[PD] perception of sound

<tboulanger@voila.fr tboulanger at voila.fr
Wed Nov 10 17:34:25 CET 2004

Thanks for your support !
Your explanations are clear (I did not think in term of energy carried by the signal but eventually it seems so obvious... let's go for a first start with a square wave) ("ça tombe sous le sens !") and I'll have a look at the links you gave me (PD beginner, I have to get involved in audio processing as well).
As for the word "buzzer", we use it to design, yes CK, a big flashy button that you squeeze the more violently you can or... a little loudspeaker. I was talking about the little loudspeaker.
At least, it seems that using a "foreigner word" in your native tongue is as hazardous than exporting a .pat to a .pd...
Have a nice day

> Message du 10/11/04 à 16h49
> De : "Roman Haefeli" 
> A : tboulanger at voila.fr, "pd-list at iem.at" 
> Copie à : 
> Objet : Re: [PD] perception of sound
> hi
> " schrieb:
> > Hi list !
> > 
> > It seems for many people that the alarm level is not enough strong, even 
> > at full blast so here's my question :
> > do you know if there are some rules that make a sound appear more strong 
> > than another at an identic level ?
> the crest-factor decribes the energy of the sound in relation to its 
> amplitude. the waveform with the highest crest-factor is a squarewave 
> (imagine: the positon of the membrane of the loudspeaker is always at 
> maximum position). using a square should result in the maximum loudness 
> at a specific amplitude.
> our is ear is the most sensitive in the area between 1 to 4kHz (as chris 
> and derek already mentioned).
> another approach:
> what about making the beep-sound of your buzzer pulse? noises without 
> constant amplitudes seem to get more attention.
> roman

Faites un voeu et puis Voila ! www.voila.fr 

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