Noise affects us everyday; at home, at leisure, during sleep, when traveling and at work. Taking an active role in making a room soundproof is not only soothing but could also yield noticeable health benefits. Below are a few things you should know about sound and how its measured.
What is STC?
|Poor: 30 – 39|
|Good: 40 – 49|
|Better: 50 – 59|
|Excellent: 60 – 69|
STC stands for Sound Transmission Class. This is a method of gauging sound transmission loss through a wall. The American Standards and Testing Materials criteria is universally accepted by architects, designers, manufacturers, contractors and distributors of acoustical building products. The original acceptability of STC 34 walls must be reconsidered with the advent of increasing noise pollution.
What are dBs?
|In general, noise pollution refers to any noise irritating to one’s ear which comes from an external source.|
While an STC rating is given in terms of points, the data is given in terms of decibels. A decibel, or dB, is a unit measure reflecting “how loud” a sound is. A sound pressure level of 0 dB represents the threshold of hearing in the most sensitive frequency range of a young, healthy ear, while the thresholds of tickling or painful sensations in the ear occur at about 120 to 130 dB.
Sound Levels and Human Response
|Common Sound||Noise Level||Effect|
|Hearing begins||10 dB||Just Audible|
|Broadcasting Studio||20 dB|
|Soft whisper||30 dB||Very quiet|
|Quiet Office||40 dB|
|Light Auto Traffic||50 dB||Quiet|
|Noisy Restaurant||70 dB||Intrusive|
|Alarm Clock||80 dB|
|City Traffic||90 dB||Annoying|
|Garbage Truck||100 dB|
|Rock Concert||110 dB||Very Loud|
|Jet Taking Off||120 dB|