Hainan public broadcasting, be safe, Tunchang, Chengmai, white sand free installation

Hainan public broadcasting, be safe, Tunchang, Chengmai, Hainan Baisha free installation Liansheng weak construction team: has a wealth of experience in construction weak construction, to undertake a variety of weak construction, cabling, installation and commissioning. He has strength and rich experience in construction, with more professional knowledge, and strong technical, professional undertaking: monitoring, alarm, network, building intercom, access control, and other construction, integrated wiring, installation and commissioning. Public Broadcasting (Public Address, abbreviated PA): the use of units of self-management within the unit in the range of voice broadcasting public service. Used for broadcasting services, broadcasting and emergency broadcasting background. Public Broadcasting System Features fold Edit this paragraph background music and emergency broadcasting Back ground music abbreviation BGM), its main role is to cover up the noise and create a relaxed and harmonious atmosphere, listening to people if not concentrate on listening, you can not distinguish the sound source position, the volume is small, is a creation of a relaxed atmosphere of the music. Therefore, the effect of background music are the two psychological cover environmental noise, the second is to create and adapt to the indoor environment atmosphere. Public broadcasting system, including background music and emergency broadcast function, usually together, it is an object of public places, in the hallway, the elevator door, the elevator car, halls, shopping malls, restaurants, bars, banquet halls, community gardens, etc. provided Combined sound column or distributed speaker box, usually play background music, the event of an emergency, strong cut emergency broadcast, and use it to direct evacuation. Folding control the public broadcasting system control functions more as constituency broadcast radio and all call functions, forced switching and priority broadcasting function. The public address system speaker loads more dispersed, the transmission line length. To reduce transmission line losses, generally used 70V or 100V constant voltage, high impedance delivery. Sound pressure less demanding, to the midrange and treble sound-based. This system microphone and loudspeaker broadcast to the public broadcasting is generally not at the same room, so silent feedback problems. Contact: 13976640562 Miss Zhang Company Name: Hainan Liansheng Science and Technology Development Co., Ltd. Address: Room pretty good Hainan Haikou Meilan District Building, 707 diligent way