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  2. Bleacher - Wikipedia

    en.wikipedia.org/wiki/Bleacher

    Bleachers (North American English), or stands, are raised, tiered rows of benches found at sports-fields and at other spectator events. Stairways provide access to the horizontal rows of seats, often with every other step enabling access to a row of benches. Benches range from simple planks to elaborate ones with backrests.

  3. Glossary of baseball terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_baseball_terms

    Bleacher seats (in short, bleachers) are uncovered seats that are typically tiered benches or other inexpensive seats located in the outfield or in any area past the main grandstand. The term comes from the assumption that the benches are sun-bleached. "Bleachers" is short for the term originally used, "bleaching boards".

  4. Siren (alarm) - Wikipedia

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

    Sound sample ⓘ An 1860s-era siren. [2] A siren is a loud noise-making device. There are two general types: mechanical and electronic. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines.

  5. Grandstand - Wikipedia

    en.wikipedia.org/wiki/Grandstand

    A covered bleacher may be called a "pavilion", also to distinguish from the main "grandstand". The term grandstanding , from the notion of playing to the people in the grandstands, is often used as a pejorative to describe someone intent on drawing attention to themself.

  6. Phonophobia - Wikipedia

    en.wikipedia.org/wiki/Phonophobia

    Phonophobia, also called ligyrophobia or sonophobia, is a fear of or aversion to loud sounds (for example firecrackers)—a type of specific phobia. [2] It is a very rare phobia which is often the symptom of hyperacusis. Sonophobia can refer to the hypersensitivity of a patient to sound and can be part of the diagnosis of a migraine.

  7. Long-range acoustic device - Wikipedia

    en.wikipedia.org/wiki/Long-range_acoustic_device

    An NYPD LRAD on top of a police humvee An LRAD operator wearing hearing protection LRAD on a navy ship. 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.

  8. Bleacher Creatures - Wikipedia

    en.wikipedia.org/wiki/Bleacher_Creatures

    Bleacher Creature members have been known to engage in conflict with non-members, and have sometimes been ejected by NYPD as a result. Since the inception of the Bleacher Creatures, many people have held a negative viewpoint towards the section for their notorious attitude towards opposing fans and players, and their raucous nature in general. [70]

  9. Noise pollution - Wikipedia

    en.wikipedia.org/wiki/Noise_pollution

    Noise pollution, or sound pollution, is the propagation of noise or sound with potential harmful effects on humans and animals. The source of outdoor noise worldwide is mainly caused by machines, transport and propagation systems.