Loud 3v Alarm / Horn System - 150 db possible? Is it Piezoelectric required?

Discussion in 'The Projects Forum' started by seamuskernow, Sep 1, 2013.

  1. seamuskernow

    Thread Starter New Member

    Sep 1, 2013
    What options are there for electronic products that work at low voltage - 3V and can output a loud sound?

    For example Piezoelectric buzzers seem to get around 100db, but is it possible to get any electronic product to emit a sound at 150db or higher with just 3V powered by two AAA batteries?

    It would be great if you could share your advice on:
    1. What other electronic products (if any) can emit loud sounds on low power.
    2. An idea of what type of circuit you would require to create loud sounds.

    Many thanks for your help.
  2. #12


    Nov 30, 2010
    150 db resembles a 4 engine airplane at 3 feet of distance. You need to tell more about your needs so we can figure the proportions of them.
  3. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    Google "piezo siren", some of those have high dB levels advertised.

    Most will require 12v to operate, but you could also google "3v to 12v DC-DC converter" because they are available too.

    Now having said that we will probably discover the O.P. is getting his "3v" from a tiny button cell... ;)
  4. strantor

    AAC Fanatic!

    Oct 3, 2010
    Go to a truck stop and get a "screaming meanie." Not sure if they still make them, but it's the loudest pocket sized alarm device I've ever met.

    Here you go.
    120 db. I suspect that's the best you are going to find.