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Irrelevant for bass signals -- most bass energy already bounces off walls, floor and ceiling

Posted by Richard BassNut Greene on January 5, 2009 at 08:42:47

In Reply to: Audibility of a 1 ms delay posted by David Aiken on January 4, 2009 at 14:18:15:

With a subwoofer, typically located 8 to 12 feet away from your ears, the majority of bass energy that reaches your ears will bounce off one or more room surfaces first.

Most of the bass energy that reaches your ears IS ALREADY DELAYED by many milliseconds because of the time needed for reflections off walls, floor, and ceiling ... before reaching your ears.

Also, there is no test evidence that any human can hear a 3 millisecond delay, much less a 1 millisecond delay, in the subwoofer frequencies under 100Hz.

I'd say the use of a digital subwoofer parametric equalizer to eliminate 2 to 4 bass peaks of +3 to +6dB .... is FAR more important to the bassline than the added 1 millisecond delay (that could be immediately eliminated by moving the subwoofer 1 foot closer to one's ears).

The probability that a subwoofer is currently located in a position where a mere 1ms of additional delay makes the "time gap" between the subwoofer and main speakers audible ... seems like a low probability event.

Let's say a specific listener with really good hearing can hear a 5ms subwoofer-satellite speaker time delay.

For an additional 1ms delay to make an audible difference, his subwoofer would have to be located where it had at least a 4ms delay (which would need an additional 1ms delay to become audible) ... but had no more than a 5ms delay (which would already be audible).
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Richard BassNut Greene
"The Floyd R. Turbo of Bingham Farms Michigan"

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