Shoei Neotec Helmet Installation
Installation of Quiet Ride Noise Reduction Ear Muffs in Shoei Neotec Helmet
Front view of used Shoei Neotec large size helmet showing no signs that it has Quiet Ride noise reduction earmuffs installed in the helmet. reduces engine sounds from stock exhaust motorcycle and wind noise by over 50% at ears.
Method of shortening chin straps
Chin strap must be shortened 2″ on each side by shortening chin strap connection to metal connector to the helmet.
Pop Rivet Gun
A thin piece of plastic was placed over slider mechanism for sun shield to protect mechanism and loop Velcro that comes in kit is stuck in proper location to inside earmuff pocket.
Plumbing parts to install in a helmet design to apply air pressure to earmuffs forcing earmuffs to seal around ears.
Test results for stock Shoei Neotec helmet before installing earmuffs and after installing noise reduction earmuffs
Test results show an average noise reduction for wind and stock engine noise of 12 decibels (dB). For every 10 dB of noise reduction your ears perceive a sound level reduction of 50%, hence the noise reduction is just over 50%.
World Health Organization
Noise Dose Chart: Noise Exposure Limits
The risk to your hearing from noise exposure depends on how loud it is and how long you’re exposed to it. This noise dose chart shows the acceptable safety limits.
Noise Dose Formula
The generally accepted standard to minimize hearing risk is based on an exposure to 85 dB for a maximum limit of eight hours per day, followed by at least ten hours of recovery time at 70 dB or lower (at which the risk of harm to healthy ears is negligible). Then a “3-dB exchange rate” formula is applied, which means that for every 3 dB above 85 dB, the maximum exposure time is cut in half.
After reading the noise exposure limits above provided by the World Health Organization riders should conclude they have three options to protect their hearing when riding for extended periods of time.
- Wear quality earplugs to protect hearing, or
- Wear a helmet with noise reduction earmuffs installed in their helmet, or
- Wear earplugs and noise reduction earmuffs installed in their helmet
I have tested many full size helmets and modular helmets for sound levels at various speeds. Using the sound level meter shown above shows sound levels at various speeds for all manufacture helmet models without ear noise reduction earmuffs installed to produce very similar sound levels no matter the manufacturer.