"Fredxx" wrote in message
...
On 27/01/2021 00:42, Theo wrote:
Bert Coules wrote:
So the silly idea is to build a small self contained unit with a very
basic
amplifier, a speaker, and a microphone (perhaps on a flying lead) which
could be placed next to the chime unit and suitably adjusted to make it
audible over a wider area.

Isn't that going to detect any sound near the chime? For example if
somebody sneezes it'll be broadcast around the house.

Could you not detect the bell push in some way? Voltage across the chime
unit, or something? Since bells are often AC, a non-invasive way might
be a
coil wrapped around one of the leads running to a detector circuit.

The OP has a wireless door bell. The push button would comprise a battery,
switch and transmitter. So no easy means of detecting the switch closing.

I have thought about this

Clearly not very well.

and can't really see any alternative other than get a doorbell and
purchase more than one sounder of the same make and type. If you choose
the same channel one push button should be able to transmit to a dozen or
more sounders. If you choose a respectable make there might also be visual
indicators too.

The other obvious possibility is to modify the sounder so its much louder

I think an email to Friedland or similar. The OP isn't unique and there
are countless properties when one or more of the residents is deaf.

But those likely get a better system which calls their
phone and use the vibration alert or flashing light etc