Eric Heller - Journey into psychoacoustics

[@norortvel]

Great work, but there is a mistake in the chart of the spectrogram of Hearing out partials of the bell, the first arrow is pointing to a partial that is higher, and so the next ones, that confuses.

[@rudranaksh9540]

I will watch this

[@ph9674]

Very interesting lecture! Are there yet any scientific papers to the subjects he was proposing?

[@PRAR1966]

🙂

[@godsdominatrix439]

Heller criticizes Helmholtz (30:56) for not understanding the difference between a "tone" and a "partial." I wish Heller himself gave us a definition for "tone" and "partial." He DOES give us his definition for pitch (25:11) as "the quality of sound remaining after loudness and timbre." I find this definition troublesome because "timbre" is often defined as the quality of sound, and I've seen sound definition of timbre that claim it to be what left over after pitch and loudness, so this odd to me. He then asks the question (26:48) "Does pitch equal periodicity of the tone?" In my readings pitch and tone are synonyms (not to be confused with "tone" in terms of intervals and "tone" in terms of guitar tone, which should really be called timbre. But back to "tone" and "partial." I agree with Heller that sine waves are the atoms of sound. But as the atoms of sound, sine waves can never be heard as pure since they require space, which means there is constant adulteration from an acoustic environment, and because ears cannot hear purely across their dynamic range (roughly 20 to 20k Hz). And what is a partial? My understanding, and I might be wrong, is that a partial is precisely a sine wave in a complex tone (pitch) or other complex sound (like a noise, which is defined as an aperiodic sound, or a sound without a focused pitch (without periodicity). The dream of synthesis is that with an infinite amount of sine waves, any sound can be constructed (though an infinite amount of sine waves is impossible, so there are shortcuts for us to get close). I think tones and pitches are synonymous here. Timbre, when applied to tone of pitch, then functions like a sweater surrounding that pitch and giving that pitch a sonic identity. But timbre does not require pitch. Noise has timbre. White noise is the opposite spectrum of sine waves: white noise also cannot be pure because any kind of acoustic environment takes the purity out of white noise. So my criticism for Heller is only that I wish he didn't gloss over some of these ideas.

[@paulwary]

From the context of each term in his presentation I think that his definition is: Pitch is the general sense of the human perception of the frequency content of presented sounds. Tone is the single frequency that dominates the perception of a presented sound, either a simple sinusoid or a complex waveform. Eg you can have a variety of tones perceived depending upon the sound, but the general ability to do that is due to your pitch perception. Partial is the 'objective' pure frequency components of a sound, either identified by Fourier transform, or generated by additive synthesis.

[@norortvel]

@cirmmt 30:00 He makes a demostration, but he doesnt choose the right frecuencies to create the 100 hertz tone, He confuses and uses 200-400-600.

[@sheyooo]

Brilliant man

[@rakanpendengaran1127]

i could not get the website for sound generation , sir can you pls help

[@MarkAllentheProducer]

I'd email you ..... but

[@avzarathustra6164]

Ooo.