On Tuesday, 13 December 2016 14:58:59 UTC, Bod wrote:
On 13/12/2016 13:20, whisky-dave wrote:
On Tuesday, 13 December 2016 13:04:13 UTC, Dave Plowman (News) wrote:
In article ,
wrote:
On Tuesday, 13 December 2016 11:05:08 UTC, wrote:
Piezos are very power efficient but they just don't have the
required volume. Old mechanicals do.

Piezos and other electronic sounders have just about replaced
conventional bells in fire alarm systems due to low current requirement
enabling more sounders to be used, for uniform volume coverage.

Piezo sounders tend to be tuned to a particular highish frequency for best
efficiency. Perhaps ideal for an alarm, but not sure I'd like that nasty
noise as a door bell.

I agree with that, horrible screeching noise great for alarms but...

I;'ve had a plan for years for a speech doorbell, simple enough really just havn;t got around to it.
I'd use phrase like southparks, "hey dude vistors" (from cartmen gets an anal probe)

or aliens the young girl "They mostly come at night, mostly"

Now coupled that with some sort of recognition of the bell ringer, and I could include obsenities ... JWs. Father Jacks, Feck, Arse, girls.

I'm sure others could come up with interesting ones.

You can get ones that you record your voice/music or whatever. I had
one, but it ate batteries. 10 secs of recording time. Good fun though.

I do have one as a kit somewhere never put it together.
it only has 1 speaker I wanted a dul asystem but as my front door is on the ground floor and my lounge 1st floor there wasn;t an easy cable run other than along the stairs and through the door, so I'm waiting for an IoT version so it.s true wireless.
I do know they use quite a bit of power even when not being pressed, so that was anothe rreason not to bother as I;d need to power it at the door or have yet more cables along the wall.