Singers sometimes practice singing right into a corner so they can hear 
themselves more accurately.

wunder

On Apr 20, 2014, at 5:19 PM, Jim Brown <[email protected]> wrote:

> On 4/20/2014 4:16 PM, Dave Hachadorian wrote:
>> I can't hear any delay in the K3 monitor, and I am VERY sensitive to that.
> 
> I have the capability to measure it, but I have not done so. If it's going 
> through any DSP, there will be some, probably a few msec. I would not expect 
> it to be a problem.
> 
> The difference between what we hear through bone conduction and the actual 
> sound of our voice is mostly the difference in frequency response between the 
> two paths.
> 
> We can get a better approximation of how we sound to others by talking 
> straight into a hard wall at a very close distance. Now, our ears hear our 
> voice bouncing off that wall with very little loss.
> 
> There's a phenomenon called "precedence effect" that was first documented by 
> Joseph Henry around 1850 (the guy whose name is on the unit of inductance in 
> recognition of his inventions involving magnetics much earlier). Precedence 
> effect describes the characteristic of human hearing that if we hear the same 
> sound from more than one direction, we will "hear" it as a single sound, 
> coming from the direction from which it arrives FIRST even though a later 
> arrival is louder. There's a limit -- a loudness difference of more than 10 
> dB will "break" precedence.
> 
> Yes, long delayed echoes can make it difficult to talk or to play music. In 
> live sound reinforcement, delays are produced by DSP, and also by the time it 
> takes sound to get from speakers over a stage down to the audience. Delays 
> more than about 35 msec will start causing fatigue or discomfort, and I've 
> heard very professional announcers slow down and stop talking with delays in 
> the 80-100 msec range.
> 
> 73, Jim K9YC
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Walter Underwood
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