crystal loudspeaker

См. также в других словарях:

• Crystal radio — Crystal set redirects here. For the Australian rock band, see The Crystal Set. A modern reproduction of an antique crystal set. It is tuned to different stations by moving the sliding contact (right) up and down the tuning coil (red). The device… …   Wikipedia

• crystal set — noun a simple early form of radio receiver with a crystal touching a metal wire as the rectifier and lacking an amplifier or loudspeaker, necessitating headphones or an earphone …   English new terms dictionary

• Oktava — Contents 1 History 2 Timeline 3 External links 4 See also …   Wikipedia

• electromechanical transducer — ▪ instrument Introduction       any type of device that either converts an electrical signal into sound waves (as in a loudspeaker) or converts a sound wave into an electrical signal (as in the microphone). Many of the transducers used in… …   Universalium

• Microphone — For the indie film, see Microphone (film). Microphones redirects here. For the indie band, see The Microphones. A …   Wikipedia

• Tweeter — A tweeter is a loudspeaker designed to produce high frequencies, typically from around 2,000 hertz to 20,000 hertz (20,000 Hz, generally considered to be the upper limit of the human hearing). A few tweeters can manage response up to an octave or …   Wikipedia

• Audio system measurements — are made for several purposes. Designers take measurements so that they can specify the performance of a piece of equipment. Maintenance engineers make them to ensure equipment is still working to specification, or to ensure that the cumulative… …   Wikipedia

• Mission 737 Renaissance — The Mission 737 Renaissance was a popular British loudspeaker produced by Mission Electronics, an audio company based in Huntingdon, United Kingdom. The Renaissance model dates from the early 80 s but has a direct lineage to the Mission Freedom… …   Wikipedia

• Antique radio — DIORA AGA RSZ 50 ca.1947 from Poland An antique radio is a radio receiving set that is collectible because of its age and rarity. Although collectors may differ on the cutoff dates, most would use 50 years old, or the pre World War II Era, for… …   Wikipedia

• Styrophone — A styrophone is an acoustic device made from Styrofoam (expanded polystyrene foam). There are at least two varieties:* an acoustic musical instrument * a type of loudspeakerThe musical instrument consists of a Styrofoam box that is forced to… …   Wikipedia

• Mechanical filter — Figure 1. A mechanical filter made by the Kokusai Electric Company intended for selecting the narrow 2 kHz bandwidth signals in SSB radio receivers. It operates at 455 kHz, a common IF for these receivers, and is dimensioned 45×15×15 mm ( …   Wikipedia