What Is a Soundproof Room?
A soundproof room is constructed with soundproofing materials, vibration damping materials, and sound-absorbing materials.
- Soundproofing material: Blocks sound by reflecting it.
- Vibration damping material: Suppresses vibrations generated by sound.
- Sound-absorbing material: Prevents reverberation noise caused by sound reflection.
These three elements are essential in designing a soundproof room, and soundproof panels used on the walls and ceiling of the soundproof room are made by combining these materials.
Additionally, a soundproof room is a sealed space that requires ventilation and heat dissipation. Therefore, ventilation openings are provided in the soundproof room, and ventilation is carried out using exhaust fans. To prevent sound leakage, a silencer duct is installed. The silencer duct, much like a muffler in a car, allows air to pass through but has sound-damping features.
Types of Soundproof Rooms
1. Noise Control Soundproof Room
Pumps, blowers, various machine tools generate significant noise. These devices are enclosed in a soundproof room to prevent noise from escaping. In factories and facilities, there are guidelines for noise control to prevent noise disturbances and environmental measurement results need to be evaluated for each management category.
[Design Criteria]
Simply enclosing the noise source in a soundproof room does not guarantee effectiveness. The sound waves from noise sources are diverse, and various factors such as installation conditions, ventilation volume, heat generation, workability, maintainability, budget, and the impact of vibrations must all be addressed. By measuring the characteristics of the noise source using sound level meters or vibration meters, the required sound insulation volume is determined, and the design is carried out.
2. Acoustic Measurement Soundproof Room
Manufacturers use soundproof rooms to measure the sound of gears, motors, and speakers for production and development purposes. Unlike noise control, the purpose here is to prevent external sounds from entering the soundproof room. Instruments like sound level meters are used for measurements. To measure small sounds, it is necessary to create an environment quieter than the sound being measured.
[Design Criteria]
The sound insulation volume and sound absorption performance are set according to the noise level generated by the object being measured and the sound pressure level for each frequency. Additionally, the shape, size, and required equipment may vary based on measurement methods such as the distance from the source to the microphone receiving point and the installation method of the object being measured.