RE: Wireless Headphones

["Mark Harrison" <Mark.Harrison@xxxxxxx>]

> Or is there some wonderful techie reason to have them open?

Response curves are very different, particularly at high frequencies.
(Like, those frequencies close in wavelength to the distance between
the
active speaker element and the back of the phone enclosure.

This is a bit of a moving feast, since as the speaker element vibrates,
the distance changes, thus does the resonant frequency.

Having open baffles circumvents this.

Regards,

Mark

-----Original Message-----
From: roaming@xxxxxxx [mailto:roaming@xxxxxxx] 
Sent: 31 December 2002 12:56
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Wireless Headphones


Now ya tell me!

I assumed they would be closed coz they were expensive!  
Having a grille on the back really doesn't help - surely it was more
expensive 
to create this than to leave it closed?
-

Are the ones you have the same?

cheers,

T.
Quoting Mark McCall <Mark@xxxxxxx>:

> You'll need a "closed" back design to minimise the escaping
sound.
> 
> M
> 
>   ----- Original Message -----
>   From: roaming@xxxxxxx
>   To: ukha_d@xxxxxxx ; Kenneth Watt
>   Sent: Tuesday, December 31, 2002 11:46 AM
>   Subject: [ukha_d] Wireless Headphones
> 
> 
>   it's not a very personal experience - the sound is very
audible out 
> the back of
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
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