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NEW! - Shoei Neotec ANC/BT Earmuff Helmet Installation

ANC earmuffs with Bluetooth and headphone sound system - available in 5 months
Meets OSHA and WHO recommendations
for hearing protection from engine and wind noise up to 70 mph (112 kph)
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Front view of used Shoei Neotec large size helmet showing no signs that it has Quiet Ride noise reduction earmuffs installed in the helmet.
Installation of Quiet Ride active noise canceling (ANC) earmuff kit with Bluetooth (BT) in Shoei Neotec Helmet
 
Thin noise reduction earmuffs shown in helmet will reduce wind and engine noise at ears by over 50%.
Standard Shoei Neotec Helmet produces damage to hearing wind and engine noise levels at 65 mph (112 kph)

First step, remove side padding shown in picture above. Grind off chin strap metal connection to helmet and cut off secondary connection. They are in the way for installing air bladder under earmuff in earmuff pocket.
Trnasforming Shoei Neotec helmet into a helmet thqt will protect your hearing up to 70 mph (112 kph)
 
Using a high speed grinder with a 1/4 inch carbide burr die grinder bit works very well to grinding off factory installed metal chin strap. Grind off ends of pop rivet holding metal chin strap connection to the helmet.
Using a high speed grinder with a 1/4" carbide burr die grinder bit works very well to grinding off factory installed metal chin strap. I use a high speed grinder with 1/4" carbide burr die grinder bit to grind off ends of pop rivet holding metal chin strap connection to the helmet.
 
Metal chin strap connection to helmet on each side of helmet must be relocated 2 inches lower and forward as shown so metal chin strap connection and chin strap will not be under earmuff.
Metal chin strap connection to helmet on each side of helmet must be relocated 2" lower and forward as shown so metal chin strap connection and chin strap will not be under earmuff. I used some 1" wide red nylon strap to replace original Shoei 1" black nylon strap that came with the helmet because I accidently cut black strap too short when shortening black original strap.
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.

To attach 1 inch wide strap securely to metal strap attachemnt to helmet I held the strap in a vice and melted 1/8 inch holes thru strap using a torch to heat up a small nail. I found some very small 1/8 inch by 3/8 inch in length metal pop rivets to secure shortened strap to metal connector.
 
Torch
To attach 1" wide strap securely to metal strap attachemnt to helmet I held the strap in a vice and melted 1/8" holes thru strap using a torch to heat up a small nail. I found some very small 1/8" by 3/8" in length metal pop rivets to secure shortened strap to metal connector.

Showing melted 1/8 inch hole thru nylon shortened chin strap for reinstallation of metal chin strap connection piece to be installed in new 3/16th inch hole drilled in the helmet for attaching metal chin strap connector.
The picture above shows melted 1/8" hole thru nylon shortened chin strap for reinstallation of metal chin strap connection piece to be installed in new 3/16th inch hole drilled in the helmet for attaching metal chin strap connector.
 
Pop Rivet Gun
Pop Rivet Gun

Pictures of shortened chin straps by 2 inches to compensate for relocation of metal chin strap connections 2 inches lower and forward on each side of helmet. Reattach metal chin strap connectors using short 3/16 inch pop rivet.
2 pictures of shortened chin straps by 2" to compensate for relocation of metal chin strap connections 2 inches lower and forward on each side of helmet. Reattach metal chin strap connectors using short 3/16" pop rivet.
 
Pictures of shortened chin straps by 2 inches to compensate for relocation of metal chin strap connections 2 inches lower and forward on each side of helmet. Reattach metal chin strap connectors using short 3/16 inch pop rivet.

An earmuff pocket must be cut out of Styrofoam insert on left and right side of helmet to accept earmuff.
An earmuff pocket must be cut out of Styrofoam insert on left and right side of helmet to accept earmuff.
 
Showing a slot cut in side padding.

The foam covering must be reformed around foam side padding for left side of the helmet.
The foam covering must be reformed around foam side padding for left side of the helmet.
 
Left side vinyl cut to allow control unit line and optional intercom line to connect to the left side ANC/BT earmuff.
Left side vinyl cut to allow control unit line and optional intercom line to connect to the left side ANC/BT earmuff.

 
Latex rubber airlines that attach to the air valve in 1st generation helmets deteriorated and rotted if exposed to sunlight for longer periods of time and would leak. Silicone line spliced into latex air line will not deteriorate from exposure to the sinlight.

Designed to apply pressure to earmuff to seal around the ears. When air pressure is released the earmuffs recede into earmuff pockets to allow dawning and removing the helmet.
Designed to apply pressure to earmuff to seal around the ears. When air pressure is released the earmuffs recede into earmuff pockets to allow dawning and removing the helmet.
 
It is important to place air bladder as shown in lower portion  of the earmuff pocketon each sideso the air bladder applies more air pressure to the bottom area of the earmuff pad surrounding the ear as more pressure is needed to seal around jaw bone under the ear versus the flat head bone surface above the ears.
It is important to place air bladder as shown in lower portion of the earmuff pocketon each sideso the air bladder applies more air pressure to the bottom area of the earmuff pad surrounding the ear as more pressure is needed to seal around jaw bone under the ear versus the flat head bone surface above the ears.

Exterior control unit for ANC/BT earmuffs.
 
Exterior control unit for ANC/BT earmuffs.
Exterior control unit for ANC/BT earmuffs.

Diagram

Custom line set attaches speaker line from an intercom headphone sound system in ANC/BT earmuffs
Custom line set attaches speaker line from an intercom headphone sound system in ANC/BT earmuffs.
 
Two small cable clamps hold the silicone airlines attached to the air valve stuck on the helmet using 3M VHB 5 lb outdoor double face tape.  One larger clamp attaches air bladder pump to the helmet and onto the air valve.
Two small cable clamps hold the silicone airlines attached to the air valve stuck on the helmet using 3M VHB 5 lb outdoor double face tape. One larger clamp attaches air bladder pump to the helmet and onto the air valve.

Testing noise reduction at various speeds was performed by riding a naked bike at various speeds with a sound level meter with remote control installed in the Quiet Ride ANC/BT earmuffs installed in the Shoei Neotec Modular helmet.
Testing noise reduction at various speeds was performed by riding a naked bike at various speeds with a sound level meter with remote control installed in the Quiet Ride ANC/BT earmuffs installed in the Shoei Neotec Modular helmet.
 
Sound level meter
Sound level meter with remote lapel mic used to measure sound levels at various speeds.

Test results for stock Shoei Neotec helmet before installing earmuffs and after installing noise reduction earmuffs.
CRUISING SPEED



35 mph
45 mph
55 mph
60 mph
65 mph
1. Sound level in stock Shoei Neotec helmet without earmuffs measured at ears placed in the ear in the helmet..

91 dB
94 dB
96 dB
97 dB
98 dB
2. Sound level in ANC/BT earmuff with the lapel mic installed in the earmuff in the Shoei Neotec Helmet.

67 dB
71 dB
73 dB
74 dB
78 dB
Test results show an average noise reduction for wind and stock engine noise of 22.6 decibles (dB). For every 10 dB of noise reduction you ears perceive a sound level reduction of 50%, hence the noise reduction is just over 75%.

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 chart


After reading the noise exposure limits information provided by the World Health Organization and OSHA riders will understand they can protect their hearing when riding for extended periods of time per day if they consistently keep their speed under 70 mph (112 kph) and have ANC earmuffs installed in their helmet.
 
 

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