"Rod" wrote in message
...
nightjar cpb@ wrote:
"Mr Flibble" wrote in message
...
Bit of bother with some of the local teenage hoods, and considering
installing one of these outside the house. Has anyone tried them, or had
any success with them ? What sort of range do they have ?

There has been talk of banning their use. However, in some shopping
areas, playing classical music has been found to be as effective.

Colin,

Unfortunately, some people suffer from hyperacusis which can result in
even otherwise-pleasant classical music driving us out of the shopping
areas - not just the hoods!

(Mind, most non-classical music, announcements, reversing beepers, etc.
are all far worse. :-))

Quick summary - http://en.wikipedia.org/wiki/Hyperacusis

I have the opposite problem - a reduction in hearing at mid-range
frequencies. However, wandering around Troyes at Christmas, I found the
constant music simply annoying.

Colin Bignell