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How does a long range acoustic device (LRAD) work ...

    https://www.soundlazer.com/how-does-a-long-range-acoustic-device-lrad-work-teardown/#:~:text=We%20already%20determined%20that%20the%20LRAD%20sound%20is,and%20not%20ultrasonic%20as%20claimed%20on%20the%20internet.
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LRAD Sound - Soundlazer

    https://www.soundlazer.com/lrad-sound/
    LRAD uses an audible sweep tone. If we examine the spectrum analyzer’s output closely, we can see that there are two underlying tones with a continuous upward sweep from 2200Hz (2.2KHz) to 3200Hz (3.2KHz). The frequency of the sound starts at 2200Hz and sweeps up to 3200Hz in a matter of a few hundred milliseconds.

How LRAD Works - HowStuffWorks

    https://science.howstuffworks.com/lrad.htm
    The higher its pitch, the faster it moves them. Loud or high-pitched noises can cross the threshold of pain, or the point at which a sound is painful. Here's how some everyday sounds compare to the LRAD: Normal conversation: 60 dB. Lawn mower: 90 dB. Threshold of pain: 130 dB, depending on the person's tolerance.

How To Make An LRAD With Arduino - Soundlazer

    https://www.soundlazer.com/how-to-make-an-lrad-with-arduino/
    Analysis in our previous article of the audio output from the Long Range Acoustic Device shows that the sound frequencies are within the mid-ranges of normal hearing levels between 2200Hz and 3200Hz. We also see that the sweep is a positive direction in a few millisecond bursts. Parts Needed For LRAD Sound Generator

LRAD Products - Genasys Inc.

    https://genasys.com/lrad-products/
    The extended frequency range of the LRAD 2000X ensures that broadcasts will be clearly heard and understood over distances up to 5,500 meters …

The Long Range Acoustic Device: pirate deterrent, crowd ...

    https://newatlas.com/lrad-long-range-acoustic-device/11433/
    The LRAD has maximum volume of 120dB at 1m in normal operation, 146 dB sustained or 151 dB burst at 1m with override. David Greig Tags Electronics Weapons Acoustics Transducers 2 comments David...

LRAD Sound Cannon - How Does LRAD Work | Sonic …

    https://www.popularmechanics.com/military/weapons/a32892398/what-is-lrad-sonic-weapon-protests/
    This limited frequency range—200 Hz to 10 kHz, roughly the same as human speech—combines with the efficient drivers and horn loading to produce the destructive tone. “It is a brute force design...

The psychoacoustic effect of infrasonic, sonic and ...

    https://littlefield.co/the-psychoacoustic-effect-of-infrasonic-sonic-and-ultrasonic-frequencies-within-non-lethal-cf05e1fd8673
    “The frequency that is thought to be most dangerous to humans is between 7 and 8Hz. This is the resonant frequency of flesh and, theoretically, it can rupture internal organs if loud enough. Seven hertz is also the average frequency of the brain’s alpha rhythms; thus this frequency has been described as dangerous but also relaxing.

Audio Spectrum Explained - Teach Me Audio

    https://www.teachmeaudio.com/mixing/techniques/audio-spectrum
    The audio spectrum is the audible frequency range at which humans can hear and spans from 20 Hz to 20,000 Hz. The audio spectrum range spans from 20 Hz to 20,000 Hz and can be effectively broken down into seven different frequency bands, with each band having a different impact on the total sound. The seven frequency bands are: Sub-bass Bass

Understanding the LRAD, the “Sound Cannon” Police Are ...

    https://www.yahoo.com/entertainment/understanding-lrad-sound-cannon-police-151807537.html
    The threshold of loudness that causes pain in healthy adults is between 120 and 140 dB, which means anyone within the first 25 feet of the LRAD could experience pain or ear damage. Sonic injury ...

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