Project Description

Embossed faced foam is a high performance acoustical material with superior absorption at the most critical frequency bands. It is often used in speaker housings, medical equipment, HVAC units, blower enclosures, and office equipment such as computer and printer housings. The embossed surface has an attractive, high tech appearance that is pleasant to the touch. It readily stands up to abusive air streams and the associated abrasion in air ducts and blower housings. Embossed foam increases sound absorption performance in the most critical frequency bands by 25% to 35% when compared to other available foams.

Embossed Foam
Thickness

Frequency (Hz)

125 250 500 1K 2K 4K NRC
1/2″ .00 .09 .24 .75 .97 .75 .50
3/4″ .07 .13 .29 .82 .86 .89 .55
1″ .07 .18 .53 .98 .88 1.01 .65
1-1/2″ .08 .31 .71 .94 .97 1.05 .75
ASTM C423-90a  Absorption Coefficient

Embossed Foam in Use

Embossed Foam Noise Correction

Embossed foam placed inside a speaker housing to correct reverberant noise.

Embossed Foam Noise Correction

Embossed foam placed inside a speaker housing to correct reverberant noise.

Embossed Foam Noise Reduction

Embossed foam placed inside beverage dispenser knocks the noise down by five dBA.

BMW Z3 roadsters with removable hardtop had drumming vibration noise at certain engine RPM. dB Engineering designed the composite kit that eliminated the offensive noise radiating inside the passenger compartment and subsequently went into their production.

Effectiveness chart of Thickness of 4# Polyester Foam

Comparison chart of a soundproofing foam of 1 inch Thick Polyester Foams

Effect of Facing on 2 inch 2 pound Polyester acoustic foam

Comparison of 2 pound and 4 pound acoustic foam at one quarter inch thickness

Effect of Thickness on Plain two pound polyester acoustic foam