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An acoustic mirror is a passive device use … An acoustic mirror is a passive device used to reflect and focus (concentrate) sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events. Pairs of large parabolic acoustic mirrors which function as "whisper galleries" are displayed in science museums to demonstrate sound focusing. Between the World Wars, before the invention of radar, parabolic sound mirrors were used experimentally as early-warning devices by military air defence forces to detect incoming enemy aircraft by listening for the sound of their engines. During World War II on the coast of southern England, a network of large concrete acoustic mirrors was in the process of being built when the project was cancelled owing to the development of the Chain Home radar system. Some of these mirrors are still standing today.of these mirrors are still standing today.
, Акустичне дзеркало (англ. Acoustic mirror) — пасивний пристрій, призначений для відбиття і фокусування звукових хвиль.
, Een akoestische reflector is een instrumen … Een akoestische reflector is een instrument om geluidsgolven te weerkaatsen en te concentreren (focussen). In de vorm van een wordt de techniek algemeen gebruikt om zachte of verafgelegen geluidsbronnen op te kunnen pikken. Het instrument bevat in elk geval een parabool- of soortgelijke reflector en een microfoon in het brandpunt.flector en een microfoon in het brandpunt.
, Hohlspiegelmikrofone werden zur Richtungsf … Hohlspiegelmikrofone werden zur Richtungsfindung (Lokalisation) von Geräuschen eingesetzt. Sie sind im Prinzip wie Parabolantennen aufgebaut, wobei der Detektor durch ein Mikrofon ersetzt wird. Ihr Einsatz erfolgt häufig in Aeroakustik-Windkanälen mit offener Messstrecke. Meist wird hierbei die Schallabstrahlung von Straßenfahrzeugen oder Flugzeugen untersucht. Daneben gibt es meistens kleinere, handgehaltene Systeme, die zum Beispiel für Abhörmaßnahmen verwendet werden.spiel für Abhörmaßnahmen verwendet werden.
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Акустичне дзеркало (англ. Acoustic mirror) — пасивний пристрій, призначений для відбиття і фокусування звукових хвиль.
, Hohlspiegelmikrofone werden zur Richtungsf … Hohlspiegelmikrofone werden zur Richtungsfindung (Lokalisation) von Geräuschen eingesetzt. Sie sind im Prinzip wie Parabolantennen aufgebaut, wobei der Detektor durch ein Mikrofon ersetzt wird. Ihr Einsatz erfolgt häufig in Aeroakustik-Windkanälen mit offener Messstrecke. Meist wird hierbei die Schallabstrahlung von Straßenfahrzeugen oder Flugzeugen untersucht. Daneben gibt es meistens kleinere, handgehaltene Systeme, die zum Beispiel für Abhörmaßnahmen verwendet werden.spiel für Abhörmaßnahmen verwendet werden.
, An acoustic mirror is a passive device use … An acoustic mirror is a passive device used to reflect and focus (concentrate) sound waves. Parabolic acoustic mirrors are widely used in parabolic microphones to pick up sound from great distances, employed in surveillance and reporting of outdoor sporting events. Pairs of large parabolic acoustic mirrors which function as "whisper galleries" are displayed in science museums to demonstrate sound focusing.nce museums to demonstrate sound focusing.
, Een akoestische reflector is een instrumen … Een akoestische reflector is een instrument om geluidsgolven te weerkaatsen en te concentreren (focussen). In de vorm van een wordt de techniek algemeen gebruikt om zachte of verafgelegen geluidsbronnen op te kunnen pikken. Het instrument bevat in elk geval een parabool- of soortgelijke reflector en een microfoon in het brandpunt.flector en een microfoon in het brandpunt.
|
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Akoestische reflector
, Акустичне дзеркало
, Acoustic mirror
, Hohlspiegelmikrofon
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