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First, the Public Broadcasting System
I-KOKO is the world's most professional public broadcasting equipment manufacturers, more than half a century in the course of development, has been a high-tech, high-quality, said the world.
The public address system and background music is divided into two major emergency broadcast system, which features practical, widely used, more and more by small, hotels, supermarkets, offices and other public places.
The background music used in cell systems can not only play music, play a relaxed and harmonious atmosphere, easing the pressure to cover up the role of noise can also be linked with the fire alarm, emergency radio, paging and other features. I-KOKO series of the amplifier can work long hours under full load, and with modern decoration in one of modern intelligent building an ideal sound system broadcasting.
I-KOKO integration of emergency public address system can connect up to 330 road speaker line, with software-driven features can be easily upgraded system will be expanded.
Second, the system design
(1), according to public broadcasting system requirements to play background music when listening to music is being unaware of the location of the sound source, with a small irritant is the pleasure of sound quality; for public broadcasting, is based on listening People can hear a clear and accurate voice for the goal; fire emergency radio listening is when people anywhere can be heard clearly and accurately as the voice of the design objectives. More than three working conditions, the average sound pressure level and frequency standards are as follows:
Background music sound pressure level = 70-85dB, wide frequency response 100-1200Hz
Sound pressure level of public broadcasting = 80-90dB, wide frequency response 100-6000Hz
Fire radio sound pressure level = 88-94dB, wide frequency response 100-6000Hz
(2), the cloth from the speaker: According to the high ceiling of smallpox, the spread of the selected speaker, as well as customers of Wen Ting Kok height (1.5 m) to determine the distribution of speakers from the (generally not less than 9 meters).
(3), each of the speaker's power rating should not be less than 3W, the number should be able to guarantee that a fire from the sub-region to any part of a recent speaker distance of not more than 25 meters; aisle with the last speaker at the end of the distance does not Should be greater than 12.5 meters.
(4), environmental noise in the larger set of regional public speaker, when the fire radio, its farthest point play within the framework of sound pressure level of play should be higher than the background noise.
Third, the main function
(A), the public address system, including background music radio, public broadcasting, as well as fire the fire radio.
(2), the public address system with AM / FM radio reception, CD player, Zhong, alarm, remote control with a microphone and broadcast urgent priority.
(3), intelligent control of the host when an emergency occurs, regardless of their geographical lines on whether the output in volume or removal of the minimum position, will automatically switch to a state of emergency broadcast.
(4), under the system set up throughout the area is divided into 4 geographical constituencies through software can be set for different regions of different background music broadcasting.
(5), fault detection circuit system, relying on the pilot 20KHZ signal detection amplifier circuit failure, if there is fault, the amplifier power LED indicator light is off, emergency relay output module, automatic switch to the backup power amplifier.
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