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2. The Mosquito - Wikipedia

   en.wikipedia.org/wiki/The_Mosquito

   The Mosquito was released to the mainstream market in 2005, through Stapleton's company Compound Security Solutions. [8] The current device has two settings: the high frequency sound targeted at youth, and another that can be heard by everyone. The range of the sound is 140 feet (43 m) with the sound baffle, and 200 feet (61 m) without. It ...

3. Security alarm - Wikipedia

   en.wikipedia.org/wiki/Security_alarm

   A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary ( theft ) or property damage , as well as against intruders.

4. Siren (alarm) - Wikipedia

   en.wikipedia.org/wiki/Siren_(alarm)

   Because of its high current draw (100 amps when power is applied) [citation needed] its application is normally limited to fire apparatus, though it has seen increasing use on type IV ambulances and rescue-squad vehicles. Its distinct tone of urgency, high sound pressure level (123 dB at 10 feet) and square sound waves account for its ...

5. Home security products to protect against squatters ... - AOL

   www.aol.com/news/home-security-products-protect...

   Outdoor and indoor security cameras. Doorbell camera. Smart light bulbs. Door stop with alarm. Window alarm. The installation of surveillance cameras is a great first step towards home security.

6. Acoustic harassment device - Wikipedia

   en.wikipedia.org/wiki/Acoustic_harassment_device

   These often employ shrill sounding screams broadcast between 12 and 17 kHz. Acoustic deterrent devices normally broadcast near 10 kHz and use high volume. [3] The intensity level of acoustic harassment devices has been measured up to 194 dB re 1uPa @ 1 m and the noise can be audible up to 50 kilometers away. [3]

7. Long-range acoustic device - Wikipedia

   en.wikipedia.org/wiki/Long-range_acoustic_device

   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. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...