Mar 17, 2025 · What makes sound a weapon? Review the basics of sound and discover exactly how the LRAD produces its "beam of sound." We'll also explore LRAD's hailing and warning abilities and other uses for sound.

Nov 7, 2019 · In this post I have explained the construction of a ultrasonic directive speaker system also called parametric speaker which may be used to transmit an audio frequency over a targeted spot or zone such that the person situated exactly at that spot is able to hear the sound while the person next to him or just outside the zone stays completely un...

A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance.

The LRAD 450XL utilizes technology developed and patented* by Genasys Inc. to provide the audio output of larger acoustic hailers almost twice its size and weight, while delivering the same outstanding vocal clarity inherent in all LRAD systems.

Jun 17, 2020 · What appears to be a projector, a box amplifier, or a loudspeaker mounted on a police car or strapped to an officer’s chest is a relatively modern military-grade deterrent that creates powerful...

View and Download GENASYS LRAD 450XL equipment manual online. LRAD 450XL marine equipment pdf manual download.

It works by taking an audio source, in this case a Bluetooth speaker circuit, which then gets modulated to 40khz through a 555 timer circuit. From the 555 timer the output gets amplified and then is then sent to an array of ultrasonic transducers.

Sep 13, 2023 · The system they use is called LRAD® (long-range acoustic device) and consists of giant flat loudspeakers mounted on the side of ships so they can send loud audio warnings to vessels at a potential range of over 500m (a third of a mile).

Download scientific diagram | Speaker Model Type Long Range Acoustic Device (LRAD) , is a speaker capable of producing loud and clear sound, this device is able to produce up to 156 dB sound in a...

At the 2017 Women's March, for instance, the Washington DC Metropolitan Police Department used a Long Range Acoustic Device (LRAD) or "sound cannon" (Figure 1) "to assist in instructing the crowd...