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Re: Speakers

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.arch.embedded
Subject Re: Speakers
Date 2020-11-05 21:57 -0800
Organization A noiseless patient Spider
Message-ID <87o8kbauxl.fsf@nightsong.com> (permalink)
References <6dc8c01f-2f7d-4dc1-a315-d25a2372c6c5o@googlegroups.com> <87d00r1kh5.fsf@nightsong.com> <ro2dfj$1640$1@gioia.aioe.org> <d053b21f-e04f-45a6-ad9d-3aa5f885651ao@googlegroups.com>

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Rick C <gnuarm.deletethisbit@gmail.com> writes:
> Yeah, this is to produce informative tones, not speech or music.  

Oh, this sounds like an alarm for your ventilator.  First thing I
thought of was a Sonalert but those apparently are around 2 khz.

Anyway, maybe try this: https://www.adafruit.com/product/1739

Rather than a 250hz tone you can get a hard-to-ignore effect by pulsing
a higher frequency tone at 250 hz.

This looks insane and mentions medical devices as an application area:
  https://www.sparkfun.com/products/16454

Many other ones here:

  https://www.sparkfun.com/categories/347

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Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-05 14:25 -0800
  Re: Speakers Paul Rubin <no.email@nospam.invalid> - 2020-11-05 14:56 -0800
    Re: Speakers John Speth <johnspeth@yahoo.com> - 2020-11-05 18:47 -0800
      Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-05 21:15 -0800
        Re: Speakers Paul Rubin <no.email@nospam.invalid> - 2020-11-05 21:57 -0800
          Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-06 08:08 -0800
            Re: Speakers Paul Rubin <no.email@nospam.invalid> - 2020-11-06 14:59 -0800
              Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-06 17:48 -0800
                Re: Speakers Paul Rubin <no.email@nospam.invalid> - 2020-11-07 01:02 -0800
              Re: Speakers upsidedown@downunder.com - 2020-11-07 06:47 +0200
                Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-06 21:23 -0800
                Re: Speakers Michael Kellett <mk@mkesc.co.uk> - 2020-11-07 13:12 +0000
                Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-07 08:05 -0800
                Re: Speakers Rick C <gnuarm.deletethisbit@gmail.com> - 2020-11-07 18:35 -0800
                Re: Speakers Paul Rubin <no.email@nospam.invalid> - 2020-11-07 21:57 -0800
  Re: Speakers "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-11-08 10:03 +0100

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