Soundproof door frame for acoustical experiment

Abstract

The invention relates to a soundproof door frame for an acoustical experiment. The soundproof door frame comprises a door frame body, and a buffer layer composed of a rubber elastic body is arranged on the contact surface of the inner side of the door frame body and a door plate. Reinforcing layers composed of steel plates and sound-absorbing layers composed of PET fibers are sequentially arrangedon the two sides of the door frame body from inside to outside, and a plurality of first sound-absorbing convex strips and a plurality of second sound-absorbing convex strips are arranged on the exteriors of the sound-absorbing layers. The section of each first sound-absorbing convex strip is of a semicircle structure, the section of each second sound-absorbing convex strip is of an inverted-trapezoid structure, and the first sound-absorbing convex strips, the second sound-absorbing convex strips and the sound-absorbing layers are of an integrated structure. The first sound-absorbing convex strips and the second sound-absorbing convex strips are arranged at intervals and evenly distributed at the sound-absorbing layers. The ratio of the thickness L1 of each reinforcing layer to the thickness L2 of the door frame body to the thickness L3 of each sound-absorbing layer is 2:3:19, the sound-absorbing layers are connected with the reinforcing layers in a glued mode, and the reinforcing layers are connected with the door frame body in a glued mode. The soundproof door frame is simple in structure, high in strength and good in soundproof 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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