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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 ...
The device works by emitting an ultra-high frequency blast (around 19–20 kHz) that teenagers or people under approximately 20 are susceptible to and find uncomfortable. Age-related hearing loss apparently prevents the ultra-high pitch sound from causing a nuisance to those in their late twenties and above, though this is wholly dependent on a ...
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in ...
Apple TV+ on Friday handed an early Season 2 renewal to the Mad Men star’s new crime drama, Your Friends & Neighbors. The pickup comes a full four-and-a-half months ahead of its series premiere ...
Extended episodes of TV shows. Adaptations of operas, Broadway plays, and other musicals; Celebrity profiles, interviews, or tribute specials; Seasonal programs or parades: Christmas television specials, Macy's Thanksgiving Day Parade, New Year's Eve; Theatrical films and "made-for-TV" movies; Animated cartoons (shorts, more than two-part episodes)
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The episode follows Phil, Claire and the kids trying to improve their communication skills by giving up their electronic devices. Gloria is getting obsessed over a neighbor's barking dog while Mitchell and Cameron try to find a preschool for Lily. "Unplugged" received a mix of critical acclaim and negative reviews.
Its distinct tone of urgency, high sound pressure level (123 dB at 10 feet) and square sound waves account for its effectiveness. In Germany and some other European countries, the pneumatic two-tone (hi-lo) siren consists of two sets of air horns, one high pitched and the other low pitched.