Questions and Answers
Q = How often does the hair-like nerves send electrical signals to the brain?
A = Unknown, must be faster than the 20kHz λ (wavelength) a lot. Thick about CD sampling frequency, why does it use a minimum of 44.1kHz? Human are analogous, might be continuous.
•Q = Do the brain process sound in time or in frequency domain?
Q = How long does the brain collect sound before processing it?
•A = It is estimated to be 35ms window. The small ear drum unable to pick up low frequency and this correlates with the equal loudness contour.
35ms wavelength - is in time domain representation - converting it to frequency -> 1/0.035 = 28.57Hz
•A = No, this would render humans incapable of changing decisions for every 35ms segment. It also suggests the brain is in a constant update. We also know humans are highly analogue, therefore cannot be using the digital jump.
•A = The brain’s adoption of integration time window for low frequency extension is one, apart from other thing.
•Q = The 35ms window? What kind of window is it? Is it a rectangular window? Or a trailing window?
A = No one knows what is the shape of the window, except that we know it is not digital hence not a rectangular window.
Suggestions have been made that full-hanning window is closest. This is true due to it's UFO shape nature. However the trailing edges on both ends are too sharp, which does not correlate with human analgoues, therefore the window may be rounded not only in the middle top and bottom, but also side edges are round too.
Unless the integration time is extremely long, then full-hanning window is applicable, but we know the integration time is only around 35ms, and that sound in continuous form of speech and music, is relatively too long in comparison, therefore a full-hanning it not entirely applicable.
Q = Does the shape of the window make a significant difference?
•A = YES extremely significant with every minor changes. (see all MLSSA window adaptation for example.)
The Human Ears
How is sound created?
How do sound travel?
How loud is loud?
How does the ear work?
How does the ear work 2?
Hairlike Nerve Died
How to localize sound?
What do we listen for - to?
How do we listen?
How to differentiate level?
What sound can be heard or not?
Regular music frequencies area
Questions and Answers
Example of sound in Frequency Domain
Example of sound in Time Domain
One prove of human listening in Time Domain
A New Thought
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