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- Parabolic_microphone abstract "A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a receiver, in much the same way that a parabolic antenna (e.g., satellite dish) does with radio waves. Parabolic microphones have great sensitivity to sounds in one direction, along the axis of the dish, and can pick up sounds from many meters away. Typical uses of this microphone include nature sound recording such as recording bird calls, field audio for sports broadcasting, and eavesdropping on conversations, for example in espionage and law enforcement. Parabolic microphones were used in many parts of the world as early as World War II, especially by the Japanese. Parabolic microphones are generally not used for high fidelity recording applications because dishes small enough to be portable have poor low frequency (bass) response. This is because, from the Rayleigh criterion, parabolic dishes can only focus waves with a wavelength much smaller than the diameter of their aperture. The wavelength of sound waves at the low end of human hearing (20 Hz) is about 17 metres (56 feet); focusing them would require a dish much larger than this. A typical parabolic microphone dish with a diameter of one metre would have little directivity for sound waves longer than 30 cm, corresponding to frequencies below 1 kHz. A gain of about 15 dB can be expected, however, when the wavelength of the sound becomes comparable with the diameter of the parabolic dish the response falls away.A shotgun microphone may be used as an alternative for applications requiring high fidelity.".
- Parabolic_microphone thumbnail ParabolicMicrophone.jpg?width=300.
- Parabolic_microphone wikiPageID "170175".
- Parabolic_microphone wikiPageLength "2325".
- Parabolic_microphone wikiPageOutDegree "19".
- Parabolic_microphone wikiPageRevisionID "673178412".
- Parabolic_microphone wikiPageWikiLink Acoustic_location.
- Parabolic_microphone wikiPageWikiLink Acoustic_mirror.
- Parabolic_microphone wikiPageWikiLink Angular_resolution.
- Parabolic_microphone wikiPageWikiLink Bird_call.
- Parabolic_microphone wikiPageWikiLink Bird_vocalization.
- Parabolic_microphone wikiPageWikiLink Category:Covert_listening_devices.
- Parabolic_microphone wikiPageWikiLink Category:Microphones.
- Parabolic_microphone wikiPageWikiLink Category:Surveillance.
- Parabolic_microphone wikiPageWikiLink Eavesdropping.
- Parabolic_microphone wikiPageWikiLink Espionage.
- Parabolic_microphone wikiPageWikiLink Microphone.
- Parabolic_microphone wikiPageWikiLink Parabolic_antenna.
- Parabolic_microphone wikiPageWikiLink Parabolic_reflector.
- Parabolic_microphone wikiPageWikiLink Radio_wave.
- Parabolic_microphone wikiPageWikiLink Rayleigh_criterion.
- Parabolic_microphone wikiPageWikiLink Satellite_dish.
- Parabolic_microphone wikiPageWikiLink Shotgun_microphone.
- Parabolic_microphone wikiPageWikiLink Sound.
- Parabolic_microphone wikiPageWikiLink Sound_recording.
- Parabolic_microphone wikiPageWikiLink Sound_recording_and_reproduction.
- Parabolic_microphone wikiPageWikiLink File:ParabolicMicrophone.jpg.
- Parabolic_microphone wikiPageWikiLinkText "Parabolic microphone".
- Parabolic_microphone wikiPageWikiLinkText "directional microphones".
- Parabolic_microphone wikiPageWikiLinkText "parabolic microphone".
- Parabolic_microphone hasPhotoCollection Parabolic_microphone.
- Parabolic_microphone wikiPageUsesTemplate Template:Reflist.
- Parabolic_microphone wikiPageUsesTemplate Template:Sound-tech-stub.
- Parabolic_microphone wikiPageUsesTemplate Template:Unreferenced.
- Parabolic_microphone subject Category:Covert_listening_devices.
- Parabolic_microphone subject Category:Microphones.
- Parabolic_microphone subject Category:Surveillance.
- Parabolic_microphone hypernym Microphone.
- Parabolic_microphone type Article.
- Parabolic_microphone type Company.
- Parabolic_microphone type Article.
- Parabolic_microphone type Sensor.
- Parabolic_microphone type Technique.
- Parabolic_microphone comment "A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a receiver, in much the same way that a parabolic antenna (e.g., satellite dish) does with radio waves. Parabolic microphones have great sensitivity to sounds in one direction, along the axis of the dish, and can pick up sounds from many meters away.".
- Parabolic_microphone label "Parabolic microphone".
- Parabolic_microphone sameAs Micròfon_parabòlic.
- Parabolic_microphone sameAs Micrófono_parabólico.
- Parabolic_microphone sameAs میکروفون_سهمیوار.
- Parabolic_microphone sameAs m.016thr.
- Parabolic_microphone sameAs Q377794.
- Parabolic_microphone sameAs Q377794.
- Parabolic_microphone wasDerivedFrom Parabolic_microphone?oldid=673178412.
- Parabolic_microphone depiction ParabolicMicrophone.jpg.
- Parabolic_microphone isPrimaryTopicOf Parabolic_microphone.