Sound insulation and sound absorption

1. The conceptual distinction between sound insulation and sound absorption

 Sound insulation: Sound insulation refers to the use of sound insulation materials or structural measures to reduce the noise generated during the propagation of sound through the air. The main function is to block the propagation path of sound and reduce the scope of noise influence.

 Sound absorption: Sound absorption refers to the use of sound-absorbing materials to absorb sound waves and convert them into heat energy or other forms of energy consumption, reducing the noise level in the space and improving the sound quality.

2. Differences and characteristics

Mechanism of action: Sound insulation focuses on blocking sound transmission, while sound absorption focuses on consuming sound wave energy.

Material selection: Sound-insulating materials usually have high density and thickness, such as sound-insulating glass, sound-insulating walls, etc.; sound-absorbing materials are mostly porous, such as mineral wool, glass wool, polyester fiber cotton, etc.

Application scenarios: Sound insulation is mainly used to block the direct connection between noise sources and receiving points, such as soundproof windows, soundproof doors, vehicle soundproof rooms, household soundproofing, etc.; sound absorption is suitable for reducing indoor noise and improving sound quality, such as anechoic rooms. , acoustic laboratories, recording studios, concert halls, etc.

Effect performance: The sound insulation effect is to reduce the distance of noise propagation and improve privacy; the sound absorption effect is to reduce the noise level in the space and improve the sound quality.

Different prices: Usually, the price of sound-absorbing materials with the same material requirements is higher than that of sound insulation materials.

Although sound insulation and sound absorption both aim to improve the sound environment, their mechanisms of action, material selection and application scenarios are different. In actual projects, we must choose appropriate noise reduction measures according to customer needs to achieve good acoustic effects.