Foundries, smelters, forges, metal finishing, sheet metal fabrication, and welding operations, are challenging work environments.

In foundries noise levels can be expected to range generally between about 80 and 110dB. Most common noise sources are from mould vibrators, shake outs, rumblers and shot blasting, arc gouging and fettling and dressing of castings, using angle grinders and hammering and banging on castings.

Operator noise exposure levels from the above sources, of between 96–102dB, as average over the shift duration, are not uncommon in this industry. Noise sources may also be found from induction furnaces.

NoiseBuster Electronic Earmuffs are great for:

• Metal Grinder Hearing Protection
• Welding Hearing Protection
• Sheet Metal Fabrication Hearing Protection
• and more..

Low Frequency Noise

Low frequency noise from engines, motors and fans is prevalent in many foundry environments. This noise is not easily eliminated with traditional passive hearing protection devices. Low frequency noise waves are long and carry great distances. They can penetrate passive barriers like foam earcups or even cement walls (which is why you can hear the bass of your neighbor's stereo).

Foundries Noise Sources	dB Level
Mould vibrators	85-114
Inverter	83-116
Arc/air gouging	82-107
9 inch angle grinder	97-110
Shot blasting	86-101
Shake out	84-95