What device can automatically measure volume and light an LED when noise is too loud?

Joseph Videtto January 13, 2013
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I work in a school, and we have a rewards program. Students are rewarded for practicing good behavior. One thing they are asked to do is not speak while the teacher is speaking. Also, when they are permitted to speak, they are asked to do so in an ‘inside voice’ (that is, not to scream or talk excessively loudly – which is referred to as ‘outside voice’ when done outside).

I would love to buy a device that could measure the frequency of their speaking out of turn throughout the day, and reward them when they comply with rules about when to speak and when to listen. In addition to that, I would live to reward them for speaking in a quiet tone when appropriate, and give them a visible ‘indicator’ (maybe an LED light) when they are speaking too loudly.

I know decibel meters are available for purchase, but without the functionality I describe.

Is there any such device available for purchase, with the features I’ve described ?

How might I hack together something that does this – best hardware and software to use ?

  1. Paul Pruitt
    January 13, 2013 at 3:14 pm

    http://www.proteacher.net/discussions/showthread.php?t=17185 - some discussion of the uses. It may work better with the alarm off.

  2. Paul Pruitt
    January 13, 2013 at 3:05 pm

    The Yacker Tracker - "CTU3030 Finally- you select the appropriate level of noise for any given situation! Traffic light is computerized with adjustable sound level meter which can be set from 50 dB to 110 dB. Green light stays lit until noise in room goes above set level, then a flashing yellow light comes on as a warning. When sound level reaches 15 decibels above set level, a red light and siren sound come on (siren sound is optional). Lights can also be adjusted manually. Unit is 17" tall and can stand on its own or be mounted on the wall. AC powered." - http://www.amazon.com/Learning-Advantage-3030-Yacker-Tracker/dp/B001AZ2O2Q/

    This one may be better: http://www.amazon.com/Deluxe-Yacker-Tracker-no-CTU3050/dp/B000GW032C/. Read the reviews...