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Design and evaluation of noise control measures for a pneumatic nail gun.

Jayakumar-V; Hubbard-A; Schneider-G; Louie-S; Zechmann-E
NOISE-CON 2013. The 28th Conference of the Institute of Noise Control Engineering, August 26 - 28, 2013, Denver, Colorado. Washington, DC: The Institute of Noise Control Engineering of the USA, 2013 Aug; :NC13-47
This paper describes the identification and noise reduction for major noise sources in a pneumatic nail gun. The objectives were to identify the major sources of noise, implement design changes to reduce the noise, and evaluate the effectiveness of the modifications. All sound power measurements were acquired in accordance with ISO 3744:2010. The sound output of the nail gun could be separated into two events: sound from the piston impact mechanism and sound from the exhaust event. For the piston impact event, the noise control effort concentrated on identifying the vibration transmission paths through the tool body. For the exhaust event, a custom muffler was designed. The impact and exhaust events were treated and analyzed separately. Wrapping foam around the nailer body and ducting the exhaust with a four foot-ten inch long hose, the impact event had a 6.2 dBA sound power reduction. In a separate measurement using the designed muffler and no wrap around the tool, the exhaust event had a 3.9 dBA sound power reduction.
Noise; Noise-levels; Noise-measurement; Sound; Hearing; Ears; Permissible-limits; Exposure-assessment; Exposure-levels; Exposure-limits; Noise-induced-hearing-loss; Short-term-exposure; Machine-tools; Air-pressure; Measurement-equipment; Power-generation; Pressure-testing; Pneumatic-tools; Pneumatic-equipment
Vignesh Jayakumar, University of Cincinnati, 2600 Clifton Ave, Cincinnati, Ohio 45521
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Construction; Manufacturing
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NOISE-CON 2013. The 28th Conference of the Institute of Noise Control Engineering, August 26 - 28, 2013, Denver, Colorado