What are the sound-absorbing materials?
Release time:
2024-12-20
Porous sound-absorbing materials: mineral wool, glass wool, felt, wood wool sound-absorbing boards, and other porous materials. These materials also have good mid to high frequency absorption, and when there is an air layer behind them, they can also absorb low frequencies.
1. Porous sound-absorbing materials: mineral wool, glass wool, felt, wood wool sound-absorbing boards, and other porous materials. These materials also have good mid to high-frequency absorption, and when there is an air layer behind them, they can also absorb low frequencies.
2. Perforated plate resonance sound-absorbing structure: perforated plywood, perforated fiber cement board, perforated paper-faced gypsum board, perforated metal plate, etc., generally absorb mid frequencies, and when combined with porous materials, they absorb mid to high frequencies. Importantly, if there is a large cavity behind them, they can also absorb low frequencies.
3. Membrane sound-absorbing structure: plastic film, canvas, artificial leather, and other membranes are mid-frequency sound-absorbing materials. The membrane and the cavity behind it form a membrane sound-absorbing structure that can absorb low to mid frequencies.
4. Spatial sound-absorbing bodies: making sound-absorbing materials into various shapes of spatial sound-absorbing bodies suspended in the air. Because their sound-absorbing area is much larger than the projected area, it can be said that their sound absorption coefficient can be greater than 1 when calculated by projected area. Hanging sound-absorbing bodies in areas with high sound energy flow density (for example, near sound sources or places where reflections are focused) has a better sound absorption effect.
5. Curtains: breathable textiles used as curtains, installed at a certain distance from the wall or window opening, similar to having an air layer behind porous materials, can be said to have a certain sound absorption effect on mid to high frequencies.
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