Article jekky
1. Bread: the place of an earlier speaker with a microphone in the same, it is possible resonance caused by acoustic feedback and whistle, distortion and oscillation. Ensuring stability and normal operation to maximize profit at the beginning of feedback from the shock of the lower critical 6db gain. 2. Burst: the tape drive only, source CD Sound Machine, no microphone, no return possible return to acoustic coefficient is equal to 0, is a special case of the BCP. its annual use can be divided into the following categories: 1) noise outside his framework is mainly used for the stadium, railway stations, parks, places of art, fountains and other music. its service area is characterized by large area space is large, noise, communication, voice guidance sound, high sound pressure level is necessary if the tall buildings around the site reflects both sound speaker layout is not quite reasonable, sound waves by multiple reflections on the training of more than 50ms delay causes double or multiple acoustic sound, the echo problem of houses that affect clarity of sound and image location. with the external is also affected by climatic conditions, wind direction and impact of environmental disturbances. 2) Inside Inside Sound Sound is most widely used, including various types Theatres, stadiums, dance halls and so forth. this is very specialized, and non-verbal reinforcement, but also the use of different types of theatrical performances, where high quality requirements. designed not only to consider the electro-acoustic technology, but also issues related to architectural acoustics. are part of the sound quality and other factors have greater impact. 3) In addition to becoming a standard SS Strengthening beyond mobile devices. commonly used in various places [as a stage (Hall), art, radio and a large banquet hall] non-performance with the installation of temporary, said mobile mobile performance stereo equipment performance must be compact, easy to carry, transport and assembly , high reliability and can be adapted to the use of harsh conditions. speed large-scale investments, generally used for rental of professional audio. 4) the address of the broadcast audience for hotels, programs for commercial buildings, ports, airports, subways, schools, background music and radio. In recent years, public broadcasters also cater for emergency radio, fire alarm with a link. public function broadcasting election observation rather as a radio and full function call, the switch priority and make forced to broadcast function. and scattered over the loudspeaker load, length of transmission line. Reducing the loss of transmission line, usually 70V or 100V DC transmission with high impedance. SPL is not necessary for sound quality and a high base. 5) Increasing the conference with national and international markets in recent years, conference calls, conferencing and digital video conference (DCN) has developed rapidly. Conference and is widely used in conference centers, hotels, groups and government agencies. conference, including conference discussion, voting, simultaneous interpretation and video conferencing. requested audio and video (image) system at the same time while using computer control and storage of session information. About the author
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