Soundproof door frame for acoustical experiment

Abstract

The invention relates to a soundproof door frame for acoustic experiments, comprising a door frame body, a buffer layer made of rubber elastic body is provided on the inner side of the door frame body and the contact surface of the door panel; two sides of the door frame body are sequentially provided with steel plates The reinforced layer and the sound-absorbing layer made of PET fibers are provided with a plurality of first sound-absorbing convex strips and a plurality of second sound-absorbing convex strips on the outside of the sound-absorbing layer. The section of the bar is an inverted trapezoidal structure, and the first sound-absorbing bar, the second sound-absorbing bar and the sound-absorbing layer are integrated; the first sound-absorbing bar and the second sound-absorbing bar are arranged at intervals on the sound-absorbing layer and evenly distributed; the thickness of the reinforcement layer L1: the door frame body Thickness L2: Sound-absorbing layer thickness L3=2:3:19; the sound-absorbing layer is connected to the reinforcement layer by gluing, and the reinforcement layer is connected to the door frame body by gluing. Simple structure, high strength, good sound insulation effect.

Description

technical field [0001] The invention relates to a door frame, in particular to a sound insulation door frame used for acoustic experiments. Background technique [0002] The acoustic laboratory is a special laboratory for simulating various ideal sound field conditions and measuring various parameters to study the law of sound wave propagation and the sound absorption, sound insulation and noise reduction performance of building materials, building structures, and building components . It is mainly used to simulate the diffusion sound field, free sound field and the propagation of sound waves in the pipeline, etc. There are reverberation chambers, anechoic chambers, sound insulation rooms, etc. In the prior art, the door and door frame used in the sound insulation room of the acoustic experiment are simple in structure, and the suction plate is often used to make it simply. There are small gaps between the door and the door frame, and occasionally sound leaks out during the...

AI Technical Summary

Problems solved by technology

In the prior art, the door and door frame used in the sound insulation room of the acoustic experiment are simple in structure, and the suction plate is often used to make it simply. bad

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