520 HZ Low Frequency

Information on 520Hz Low Frequency Sounders for Sleeping Areas


Below are two active links that will allow you to sample a standard fire alarm tone as well as the newer low frequency 520Hz tone


Listen to a 520HZ Low Frequency Tone



Listen to a 3 KHz Standard Tone 









Click on the links below to read different articles we have written pertaining to the newer low frequency 520Hz sounders for occupant notification.



Low Frequency Sounders for Hearing ImpairedSome basic information about the newer International Building Code required and NFPA 72 standard 520 Hz Low Frequency Sounders for sleeping areas.

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