Ventilated type vehicle-mounted woofer speaker system and design method thereof

Abstract

The invention discloses a ventilated type vehicle-mounted woofer speaker system and a design method thereof. The design method is designed based on a waveguide tube, can adjust and control many parameters and is high in freedom degree. The design method of the ventilated type vehicle-mounted woofer speaker system comprises the following steps of: S1, calculating a radiation impedance of a current waveguide tube of a speaker system; S2, establishing a mathematical model of the speaker system according to the radiation impedance of the waveguide tube obtained in step S1; S3, calculating a radiation sound field of the speaker system according to the mathematical model established in step S2; and S4, comparing the radiation sound field obtained in step S3 with an expected radiation sound field, and adjusting a structure of the waveguide tube if the expected radiation sound field is not satisfied.

Description

technical field [0001] The invention relates to the field of vehicle speakers, in particular to a ventilated vehicle subwoofer system and a design method thereof. Background technique [0002] With the rapid development of the automobile industry and the increasing popularity of automobile tools, the relationship between car audio and people is getting closer and closer. The quality of sound in cars has become a hot spot in the current market. Car audio involves the design of physical devices, including speakers, cavities, and the optimization of the car's acoustic environment; car audio also involves audio signal processing, such as equalization, surround sound adjustment, etc. An excellent high-quality car audio system, the woofer is especially important. At present, the common design scheme is to design the woofer unit as a closed or perforated box and place it in the trunk, and transmit low-frequency sound waves through the gap between the trunk and the compartment; th...

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Problems solved by technology

[0004] However, it should be pointed out that the current research, including the above two patents, does not give a specific method for adjusting the low-frequency resonance frequency of the speaker, nor does it give the size of the tube and the size of the rear cavity. What kind of frequency will be obtained? and only from the design point of view of the Helmholtz resonator, there are too few degrees of freedom to adjust, and it is likely that the length of the tube that meets the index requirements is not suitable for installation in the car

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