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Sometimes the reproduction of the very lowest frequencies (20–~50 Hz) is augmented by a subwoofer often in its own (large) enclosure. In a two-way or three-way speaker system (one with drivers covering two or three different frequency ranges) there is a small amount of passive electronics called a crossover network which helps direct ...
The first one was the SPK375 which were made to go on optional speaker stands. They were rated at 60 watts RMS and 120 watts maximum and were in a 36-pound acoustic suspension enclosure . These were initially meant to be used with the 100 watt MSA-100 amplifier; then later in 1985 the 200 watt MSA-200 amplifier was released which was compatible ...
[16] This approach to communication encompasses the possibility or idea that one may be responsible for unexpected outcomes due to what and how one communicates. This perspective widens the scope of focus from a single speaker who is intervening to a multitude of speakers all communicating and intervening, simultaneously affecting the world ...
Some PA systems have speakers that cover more than one building, extending to an entire campus of a college, office or industrial site, or an entire outdoor complex (e.g., an athletic stadium). A large PA system may also be used as an alert system during an emergency. PA systems by size and subwoofer approach
The larger the speaker, and the higher the frequency, the longer the effective nearfield. The nearfield for this device is approximately 8 metres (26 ft). [9] An LRAD can thus emit a targeted "beam" of sound at very high volume, up to 160 dB at one meter from the device. This is louder than standing behind a jet engine taking off, or a nearby ...
A speaker driver mounted on a finite baffle will display a physical phenomenon known as interference, which can result in perceivable frequency-dependent sound attenuation. This phenomenon is particularly noticeable at low frequencies where the wavelengths are large enough that interference will affect the entire listening area.
Human communication can be defined as any Shared Symbolic Interaction. [6]Shared, because each communication process also requires a system of signification (the Code) as its necessary condition, and if the encoding is not known to all those who are involved in the communication process, there is no understanding and therefore fails the same notification.
Many models of communication include the idea that a sender encodes a message and uses a channel to transmit it to a receiver. Noise may distort the message along the way. The receiver then decodes the message and gives some form of feedback. [1] Models of communication simplify or represent the process of communication.