Housing Material Products
Top page > Business and Products > housing material products list > Tidbits of Knowledge on Soundproofing
Tidbits of Knowledge on Soundproofing
Glossary of Soundproofing Terms
Sound insulation is a means of soundproofing by reflecting as much sound as possible.
The smaller the sound leakage from or into a certain space, the higher the sound insulation.
Blocking the sound of a piano or stereo from being heard outside the room.
Blocking outside sounds from entering a room.
Representative sound insulating materials: steel plates, sound insulating sheets, lead sheets, plasterboard
When sound passes through material with many small holes in it, the sound waves are attenuated. Material that permits large portion of sound to pass through the holes and reflects minimal portion of it is said to have good sound absorbency.
Example: Reducing the echoing of sound in a room
Representative sound absorbing materials: glass wool, rock wool, rock wool sound absorbing board
Vibration damping is a means of reducing vibration in a short period of time to prevent vibration noise.
Stopping the vibration (sympathetic vibration) of air conditioners and refrigerators.
Reducing the noise generation of flooring material.
Representative vibration damping materials: vibration damping sheets, rubber sheets
Vibration proofing is a means of reducing the transmission of vibration.
Reducing the transmission of noise and vibration caused by people walking overhead.
Reducing the transmission of low pitched sound from stereos.
Representative vibration proofing materials: rubber mats, felt
Noise Levels in Daily Life
● Ticking of a clock
● Sound of breathing
● Air supply sound of an air-conditioner|
● Residential area during the daytime
● Alarm clock
● Running water in a stainless steel sink
● A wooden door closing
● Flush toilet
● TV at a high volume
● Inside a Karaoke booth
● Inside a noisy factory
● Beating of a drum
● Rock music
● Thunder nearby
● Under a railroad bridge
2 units of measurement that express noise level