Method for arranging loudspeaker of acoustic amplification system in long space

Abstract

The invention discloses a method for arranging a loudspeaker of an acoustic amplification system in a long space, aiming at a requirement for the non-uniformity of a sound field. According to the size and the boundary conditions of the long space and the requirement for the non-uniformity of the sound field, the method comprises the steps of: providing transverse and longitudinal arrangement numbers or intervals in the long space through acoustic attenuation curves of the loudspeaker at different positions in the long space. The method is adaptable to long spaces with two vertical boundaries being perpendicular to the ground surface and having consistent boundary conditions.

Description

technical field [0001] The invention relates to the design of a public broadcasting system, especially the loudspeaker layout method of the sound reinforcement system in long spaces such as tunnels, corridors, and train carriages. Background technique [0002] In the acoustic design of broadcasting systems in actual long spaces, such as tunnels and subway cars, multi-speaker sound reinforcement systems are widely used because sound pressure attenuates with distance in long spaces. British scholar [J.Kang, "Speech intelligibility of multiple loudspeaker public address systems in long enclosures," J.Acoust.Soc.Am.Volume 98, 2982-2982 (1995); J.Kang, "Acoustics in long enclosures with multiple sources," J.Acoust.Soc.Am.Volume 99, 985-989(1996)] based on the existing long-space acoustic method, the acoustic parameters of the multi-source long space were studied, he pointed out that the sound reinforcement in the long space In the system, many factors need to be considered to op...

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Problems solved by technology

However, some studies [Peng Miaoyan. Acoustic Design of Public Address System and Related Standards - Public Broadcasting National Standard Demonstration Project. Electroacoustic Technology, 31(8), 79-82(2007)] pointed out that this design method is only for the sound field. The premise that the uniformity is not greater than 3dB is required to be obtained, so the resulting loudspeaker spacing is relatively small, and the number of loudspeakers required is large

[0007] The unevenness of loudspeaker placement in the actual long space is generally greater than 3dB. At present, there is no loudspeaker system placement method for the unevenness of the sound field in special spaces such as long spaces.

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