Acoustic test system of active noise reduction earphone

Abstract

The invention relates to the technical field of earphone acoustic structures, in particular to an acoustic test system of an active noise reduction earphone. The system comprises an audio system, a test sound card, a test microphone, a converter and a console; the audio system comprises a test loudspeaker, the test loudspeaker comprises a simulation front shell and a simulation rear shell, the simulation front shell is provided with a front cavity, the simulation front shell is further provided with a middle cavity, a hole channel and a leakage hole, the middle cavity is internally provided with a testing space used for containing the resonance damping loudspeaker box to be tested, the inner wall of the middle cavity is provided with an installation hole site, one end of the leakage hole is communicated with the front cavity, the installation hole site is provided with an elastic flat pressing pipe body which is used for supporting and is communicated with the interior of the resonance damping loudspeaker box, and the elastic flat pressing pipe body is provided with a through hole; and one end of the flat pressing pipe body is inserted into the mounting hole site. The acoustic testing system of the active noise reduction earphone can be used for testing a resonance damping loudspeaker box with a special structure, the tested resonance damping loudspeaker box is easy to install and replace, and the actual earphone assembling environment of a loudspeaker is simulated.

Description

technical field [0001] The invention relates to the technical field of earphone acoustic structure, in particular to an acoustic test system for active noise reduction earphones. Background technique [0002] The acoustic structure of active noise-cancelling headphones seriously affects the overall performance of the headphones, and they must pass various tests before entering the market. [0003] The production consistency of noise-cancelling headphones is very high. At the same time, it is also necessary to consider whether the design of the headphones can ensure the consistency of leakage when worn by real people. The common method in design is to increase the leakage resistance of the front cavity, but this will lead to frequency response The range is narrowed, which reduces the sensitivity of the earphone. In order to solve this problem, someone proposed a design of a resonance damping speaker box. In the speaker installation box, it is proposed to realize the problem t...

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Problems solved by technology

[0003] The production consistency of noise-cancelling headphones is very high. At the same time, it is also necessary to consider whether the design of the headphones can ensure the consistency of leakage when worn by real people. The common method in design is to increase the leakage resistance of the front cavity, but this will lead to frequency response The range is narrowed, which reduces the sensitivity of the earphone. In order to solve this problem, someone proposed a design of a resonance damping speaker box. In the speaker installation box, it is proposed to realize the problem through the material selection and structural design of the resonance damping speaker box. Solved, but the prior art has not been able to provide a system for simulating the acoustic performance of the resonance damping speaker box

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