Influence of Gear Design on Gearbox Radiated Noise - January/February 1998
The article "Influence of Gear Design on Gearbox Radiated Noise" appeared in the January/February 1998 issue of Gear Technology.
A major source of helicopter cabin noise (which has been measured at over 100 decibels sound pressure level) is the gearbox. Reduction of this noise is a NASA and U.S. Army goal. A requirement for the Army/NASA Advanced Rotorcraft Transmission project was a 10 dB noise reduction compared to current designs.
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