(800)
No Noise
sales@800nonoise.com
|
Quieting a
roomful of buzz saws
If
you've ever used a power saw in the basement, your family was probably more irritated with
the noise than excited about your creation. Imagine what a saw mill sounds like!
The owner of this sawmill didn't have to imagine
anything; his compact, efficient sawmill cuts and planes hardwood from raw logs for the
furniture industry.
After renovating the building, he found that the
new walls and ceilings contributed to a significant increase in noise levels. It was
a problem that the owner and his insurance company wanted resolved for the comfort and
safety of his employees.
After assessing the problem, it was determined
that the noisiest part of the operation, the actual sawing, could not be isolated because
every piece of equipment had to remain accessible to perform that function. Acoustic
enclosures were considered impractical. Instead of isolating the noise at the
source, they decided to treat the environment. |
More than 600 ceiling baffles reduced overall noise
levels by 8 db(A).
The cost of a standard 2'x4' polywrap baffle is
substantially less than any other noise reduction treatment
|
It was recommended that a large quantity of
Polywrap Acoustic Baffles be suspended from the ceiling throughout the entire mill.
Since the ceiling height was less than ten feet, the suspended baffles placed
a great deal of absorption close to the noise sources.
The customer's goal of a 5 dB(A) noise reduction was
exceeded. By virtually eliminating reverberation as a factor, noise levels were
reduced by approximately 8 dB(A) throughout the entire mill. Even better, the cost
of the project was so low that the owner was well satisfied.
The owner and his employees now work in a much more
comfortable atmosphere. Besides the obvious benefits of increased productivity and a
quieter place to work, Les knows that his operation will always be
in compliance with OSHA noise standards - and there's a lot of comfort in that!
Polywrap Baffles are an effective tool to improve room
acoustics. The cost, even in large quantities, is affordable to virtually any
business. Polywrap Baffles are best utilized in applications where they will not be
subjected to abrasion or traffic.
The standard Polywrap Baffle comes in white, 2' w. x4' l. x1
1/2" th. with grommets installed for easy hanging.
ACOUSTICAL BAFFLES
Polywrapped Style
Absorption coefficients-sabins/unit
One-third octave band center frequency Hz |
| Style |
125 |
250 |
500 |
1000 |
2000 |
4000 |
NRC |
| Polywrap |
2.6 |
5.6 |
9.1 |
11.9 |
9.5 |
6.3 |
9.05 |
Table showing how the human ear perceives noise reduction.
|
| Decibel Reduction |
Reduction Experienced by Ear |
| 2 |
15% |
| 4 |
23% |
| 6 |
38% |
| 8 |
48% |
| 10 |
56% |
| 12 |
63% |
| 14 |
68% |
| 16 |
75% |
| 18 |
77% |
| 20 |
81% |
|