Noise Reduction

Reflected sounds that are not absorbed will cause as increase in overall sound levels in a space. When the space is acoustically treated the sound build up is eliminated or reduced. The sound level differences between the untreated space and the acoustically treated space is described as the Noise Reduction (NR).

Sound measured on one side of a wall and then on the opposite side will reflect the sound transmission blocking characteristics of the wall. The difference between the two measurements is described as the Noise Reduction characteristics of the wall.

Treating a noisy reverberant space with acoustical materials can reduce the reflected sound build up that occurs due to the reflective hard surfaces.

In a"before treatment" and "after treatment" comparison the decibel level can be calculated. This diagram can be used to compare how the sound reduction will be perceived.

Example: An existing room with 500 sabines of absorption prior to acoustical treatment that adds an additional 1500 sabins will have a absorption ratio of

Treated	= 4
Untreated

The treated room will be perceived to be about 37% quieter than the untreated room.

• Soundproofing Products • Sonex Ceiling & Wall Panels • Sound Control Curtains • Equipment Enclosures • Acoustical Baffles & Banners • Solid Wood & Veneer Acoustical Ceiling & Wall Systems • Professional Audio Acoustics • Vibration & Damping Control Fire Retardant Acoustics • Hearing Protection • Moisture & Impact Resistant Products • Floor Impact Noise Reduction • Sound Absorbers • Noise Barriers • Fabric Wrapped Wall Panels • Acoustical Foam (Egg Crate) Acoustical Sealants & Adhesives • Outdoor Noise Control • Assistive Listening Devices • OSHA, FDA, ADACompliance • On-Site Acoustical Analysis • Acoustical Design & Consulting • Large Inventory • Fast Shipment • No Project too Large or Small • Major Credit Cards Accepted

123 Columbia Court North • Suite 201 • Chaska, MN 55318 • Tel: (952)-448-5300
Fax: (952)-448-2613 • 1-(800)-854-2948 • Email: [email protected]
NOISE CONTROL HELP LINE 1-(800)-854-2948