In article ,
Andy Burns wrote:
Andrew wrote:

I find it difficult to believe that this would provide
66 minutes of protection.

https://www.richersounds.com/clearance-bargains/in-store/39/hoody-hoody4.html?instore


They seemed to manage 90 minutes of testing

https://www.mastdigital.co.uk/media/productattach//h/o/hoody_bs_en_1363_1.pdf

If it prevents the sound from the speaker going elsewhere, it's going to
effect the sound it makes too.

The design of a speaker to go in a true infinite baffle like a ceiling is
likely to be very different from one designed to go in a small sealed box.

That's a beauty of ceiling mounting - a relatively inexpensive unit can
sound quite good.

Of course it's merely a comms speaker used for announcements etc it likely
doesn't matter much. But this specifically mentions domestic use.

--
*The sooner you fall behind, the more time you'll have to catch up *

Dave Plowman London SW
To e-mail, change noise into sound.