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On Mon, Dec 31, 2012 at 2:14 PM, Neil  wrote:
> On Sun, Dec 30, 2012 at 8:28 PM, Fernando Lopez-Lezcano

quoted text
>  wrote:

> > Just a thought: a speaker with an extended frequency response (ie: able

> to

> > reproduce ultrasound) could sound "better" because the high frequency

> driver

> > is more linear and better behaved in the _audible_ range, and not

> because it

> > is able to reproduce sound above our hearing limit...

>

> Good point.  I don't doubt at all that the speakers in question sound

> great.

>

> Neil

>

It's a simple reason if you have the math background:  signals with compact

support in the time domain have infinitely long tails in the frequency

domain.  By having more high frequency range, you improve the temporal

response of the transducer.

At the ends of the frequency range, the group delay becomes significant and

shifts some components of the signal more than others.  A wide-band

transducer with high damping is better able to reproduce the signals that

you feed it, but also loses some of its capability to deliver power.
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On Mon, Dec 31, 2012 at 2:14 PM, Neil <djdualcore@gmail.com=

quoted text
> wrote:

On Sun,=

 Dec 30, 2012 at 8:28 PM, Fernando Lopez-Lezcano

<nando@ccrma.stanford.edu> wrote:

quoted text
> Just a thought: a speaker with an extended frequency response (ie: abl=

e to

quoted text
> reproduce ultrasound) could sound "better" because the high =

frequency driver

quoted text
> is more linear and better behaved in the _audible_ range, and not beca=

use it

quoted text
> is able to reproduce sound above our hearing limit...

Good point. =A0I don't doubt at all that the speakers in question=

 sound great.
NeilIt's a simple reason if =

you have the math background:=A0 signals with compact support in the time d=

omain have infinitely long tails in the frequency domain.=A0 By having more=

 high frequency range, you improve the temporal response of the transducer.=

=A0

At the ends of the frequency range, the group delay becomes significant=20

and shifts some components of the signal more than others.=A0 A wide-band t=

ransducer with high damping is better able to reproduce the signals that yo=

u feed it, but also loses some of its capability to deliver power.
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