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The program then suggests the number and arrangement of boxes. Alternatively, some programs require the number of boxes entered and it will predict the resulting sound pressure levels in different parts of the room. Once designed, the rigging points are hung from the structure, followed by chain motors (or blocks), flying frame and then the ...
This frequency is known as the free-space resonance of the loudspeaker and is designated by F s. At this frequency, the voice coil is vibrating in the speaker's magnetic field with maximum peak-to-peak amplitude and velocity. The back EMF generated by this movement is also at its maximum. The electrical impedance of the speaker varies with the ...
All speaker drivers have a means of electrically inducing back-and-forth motion. Typically there is a tightly wound coil of insulated wire (known as a voice coil) attached to the neck of the driver's cone. In a ribbon speaker, the voice coil may be printed or bonded onto a sheet of very thin paper, aluminum, fiberglass or plastic.
That speaker sold for $220,000 a pair when it was discontinued. The developers of the Tri-Ergon sound-on-film sound film system had developed a primitive design of electrostatic loudspeaker as early as 1919. David JansZen, son of Arthur JansZen, using his father's papers and designs introduced his own version of electrostatic hybrid speakers.
The output of this mixer is thus audio frequency, which is passed through a low pass filter into an audio amplifier which may drive a speaker. For receiving CW ( morse code ) the local oscillator is tuned to a frequency slightly different from that of the transmitter in order to turn the received signal into an audible "beep."
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Sound reinforcement in a large format system typically involves a signal path that starts with the signal inputs, which may be instrument pickups (on an electric guitar or electric bass) or a microphone that a vocalist is singing into or a microphone placed in front of an instrument or guitar amplifier.