Acoustic resistance testing equipment and acoustic resistance testing system for die cutting part

Abstract

The invention discloses acoustic resistance testing equipment and an acoustic resistance testing system for a die-cutting part. The acoustic resistance testing equipment for the die-cutting part comprises an airflow channel, a flow velocity sensor, a first pressure sensor, a second pressure sensor and a control circuit; the airflow channel is provided with a test product placing area, the first pressure sensor and the second pressure sensor are arranged at the two sides of the test product placing area respectively, and the flow velocity sensor is arranged in the air flow channel; the control circuit is connected with the flow velocity sensor, the first pressure sensor and the second pressure sensor. the airflow channel comprises a shell, and the shell is provided with an air flow inlet and an air flow outlet; and the acoustic resistance testing equipment is provided with an airflow adjusting mechanism which can adjust the airflow speed in the airflow channel. According to the acoustic resistance testing equipment and the acoustic resistance testing system for the die cutting part, the acoustic characteristics of the acoustic element can be effectively evaluated.

Description

technical field [0001] The invention belongs to the technical field of acoustic impedance testing, and relates to a testing device, in particular to a die-cut acoustic impedance testing device and an acoustic impedance testing system. Background technique [0002] Acoustic impedance is a physical quantity that characterizes the relative relationship between gas pressure and particle velocity around the gas, and reflects the transmission ability of sound waves in materials. There are many traditional acoustic impedance measurement methods, generally there are reference acoustic impedance method and transmission line method based on acoustic waveguide. However, no matter which of the two test methods, most of them are developed for bulk materials, and are very poorly applicable to cloth mesh or film materials with small thickness. [0003] Flow resistance refers to the ratio of the pressure difference on both sides of the sound-absorbing material sample to the linear velocity...

AI Technical Summary

Problems solved by technology

According to the existing air permeability measurement standards, it is mainly aimed at textile materials, and lacks the pertinence of acoustic materials, so the applicability is relatively poor

On the other hand, there are only a few devices that mainly rely on reference acoustic resistance for testing, which has problems such as cumbersome operation, poor accuracy, and poor repeatability.

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