A rural broadcasting system

Abstract

The invention provides a rural broadcast system comprising a signal input device, a variable frequency modulator, a transmitter and a broadcast terminal, wherein the broadcast terminal comprises a loudspeaker, the loudspeaker comprises a sound production body and a first cover body matched with the sound production body, the loudspeaker further comprises a second cover body, the second cover body is arranged on an outer side of the first cover body, a hole communicating with the second cover body is formed in the first cover body, a vibrating membrane is arranged on the hole, the conicity of the first cover body is the same as that of the second cover body, and the first cover body is longer than the second cover body. The intensity of acoustic waves in an area located between the first cover body and the second cover body is smaller than the intensity of acoustic waves in the first cover body, but since the acoustic wave transmission distance is relatively small, the listening of this part of audience is influenced. Therefore, the effect that near and distant audience can hear approximate volume within a certain range can be achieved. The position of a baffle is adjusted to adjust the intensity of acoustic waves that enter the area located between the first cover body and the second cover body.

Description

technical field [0001] The invention relates to the technical field of broadcasting, in particular to a rural broadcasting system. Background technique [0002] In the rural broadcasting system, the loudspeaker is the main broadcasting terminal, which is used to deliver the audio model to the audience. Especially for loudspeakers installed outdoors, in order to transmit audio signals to as far away as possible listeners, the loudspeakers are generally provided with a conical cover. But this also brings some problems, that is, listeners who are close to the speaker may find it harsh, but listeners who are far away from the speaker will feel that the sound is too light. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the invention provides a rural broadcasting system, which can make listeners within a certain distance hear similar sounds. [0004] In order to solve the above technical problems, the present invention is solved by the followin...

AI Technical Summary

Problems solved by technology

But this also brings some problems, that is, listeners who are close to the speaker may find it harsh, but listeners who are far away from the speaker will feel that the sound is too soft

Images