Outdoor Public Address SystemsJune 30, 2018The outdoor public address systems can be divided into the following categories according to transmission and signal processing:1. Traditional outdoor public address systems: the outdoor public addres...view
Function of the Outdoor Public Address SystemJune 29, 2018The outdoor public address system includes background music and emergency broadcasting, which are usually combined. Its objects are public places. They are installed in the corridor, the elevator door...view
A Brief Introduction of Public Address AmplifiersJune 28, 2018Public address amplifiers are a device for amplifying the voltage or power of an input signal, consisting of an electron tube or a transistor, a power transformer and other electrical components. It i...viewTypes of Announcement SpeakersJune 28, 2018There are many types of announcement speakers, which can be divided into electric type(moving coil), electrostatic (capacitance), electromagnetic (tongue spring), piezoelectric (crystal type) and so o...view
A Brief Introduction to the Announcement Speaker SystemJune 25, 2018An announcement speaker is a transducer that transforms electrical signals into acoustic signals. The performance of speakers has great influence on their sound quality. The speaker is the weakest dev...view
A Brief Introduction to the Surface Mount Ceiling SpeakerJune 24, 2018Surface mount ceiling speaker, also known as the surface mount speaker, an important member of the public broadcasting system, is a ceiling mounted electro-acoustic conversion device. It is used to co...view
The Selection of Surface Mount Ceiling SpeakerJune 23, 2018Site formulation is advocated. It is generally difficult to achieve the best result of the selection of surface mount ceiling speaker and the arrangement of the loudspeakers based on the drawings with...view
The discriminative methods of positive and negative poles of announcement speakerJune 22, 2018The phase of an announcement speaker is the connection of the positive and negative poles of the loudspeaker when used in series and parallel. When more than two speakers are used, the consistency of ...view
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