Innovative Bike Paraphernalia

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The Iguana
Participant
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I’ve had some untested ideas about a device that reduces helmet airflow noise…

From https://student.societyforscience.org/blog/doing-science/teen-scientists-invent-accessible-devices-research-cancer

My device works by reducing the turbulence that causes wind noise. Turbulence occurs when air flows around obstructions; in this case, around the helmet straps and the outer ear (pinna).

It’s important that my device works by reducing turbulence and not by muffling all sounds. Other sounds such as cars and emergency sirens can still be heard.


Eric
Member
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Neat.  These have been available for a while and claim to do the same thing.

http://www.cat-ears.com


Ornoth
Member
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Also http://www.slipstreamz.com/

I’ve used their “The Spoiler” product in the past, and found it minimally effective.


paulheckbert
Moderator
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I know someone with the Cat Ears product that loves them.

A science digression: I’m skeptical that turbulence is the cause of the wind noise problem and that reduction of turbulence is the key to the success of Cat Ears for cyclists or fur windscreens for microphones. I suspect the problem is wind speed at the sensor (eardrum or microphone) and fur works by slowing the wind speed at the sensor.

If old people stopped using ear hair trimmers, maybe we wouldn’t need Cat Ears.


The Iguana
Participant
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Science from https://www.noisyplanet.nidcd.nih.gov/have-you-heard/wind-noise-can-contribute-to-noise-Induced-hearing-loss-in-cyclists

Researchers from Henry Ford Hospital Department of Otolaryngology—Head and Neck Surgery found that wind-related noise experienced by cyclists can be loud enough to contribute to noise-induced hearing loss—with wind noise increasing proportionally with speed, ranging from 85 decibels at 15 mph (about the speed of an average cyclist on flat terrain) to 120 decibels at 60 mph (the approximate speed of a professional cyclist racing downhill).

To study the impact of wind noise, researchers used the Ford Motor Company aero-acoustic wind tunnel to generate wind speeds ranging from 15-60 mph. Cyclists were fitted with microphones attached to their ears to measure the noise level at various speeds, with sound measurement taken with the cyclist’s head position at 15-degree increments relative to the wind. Interestingly, researchers discovered that wind noise was greatest for the cyclist’s downwind ear due to air turbulence caused by whirlpool currents observed on the downwind side. You can read more about the study online:
From https://www.henryford.com/news/2016/09/wind-related-noise-experienced-by-cyclists-can-contribute-to-noise-induced-hearing-loss
The researchers say this finding may be due to air turbulence caused from eddy currents observed on the downwind side.
….
May be AIR TURBULENCE…


Eric
Member
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I tried cat ears. They reduced the wind noise but they would get sweaty (gross) and also kept slipping down my helmet straps, so I gave them up.


Marko82
Participant
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And another thing….

Why does the wind noise seem so much worse in the winter?  I hardly notice it in warmer weather.


The Iguana
Participant
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From Interbike 2017 via Bicycle Times
http://bicycletimesmag.com/interbike-2017-day-1/

Silca Tattico pump with Bluetooth https://silca.cc/products/tattico-bluetooth-mini-pump…digital gauge interfaces to your phone…a bit overboard I think..

Acepac Bike Shelter… 1100 grams, sleeps two people, folds up into the size of a Nalgene bottle. Leave the groundsheet at home and you have a 750 gram shelter. All for only $120

AnneeLondon folding helmet https://www.anneelondon.com/…that’s innovative

http://bicycletimesmag.com/interbike-2017-day-2-tidbits/

Pinhead Locks https://pinheadlocks.com/store/en/… Pinhead is an anti-theft system for the entire bike, including locks for your components as well as your frame.

….


Benzo
Participant
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The annelondon helmet looks interesting. Looks kind of goofy in the photos, but it’s still not in full production. The one thing I havn’t seen is pictures of anyone actually wearing one of these on their head. My biggest worry would be lack of ventilation.

I was looking at the morpher helmet, which looked like an decent folding helmet option as well.  https://www.morpherhelmet.com/

 

 


The Iguana
Participant
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https://www.treehugger.com/bikes/can-life-sticker-prevent-door-prizes.html

“Any car door that’s opened suddenly can have serious consequences, especially if cyclists or motorcyclists are approaching from the rear. Semcon’s patent-pending solution is called Life Sticker. Life Sticker can be stuck easily to a door mirror, no matter what kind of car you have – old or new. When a cyclist approaches, the driver is alerted in time and can avoid opening the door into the cyclist, thereby preventing an accident.”


Eric
Member
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It is cheaper to look over your shoulder before opening a car door. (:


StuInMcCandless
Participant
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Safety is not something you buy, it’s something you do.


paulheckbert
Moderator
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If you want a pedal-powered, collapsible boat, here are 5 options: Akwakat, itBikes, Bikeboat (chiliboats), Shuttle Bike, Bikeboat Up (chiliboats). All of them use a catamaran flotation system (two inflatable pontoons). Some attach to your existing bicycle, and fit in a backpack.


jonawebb
Participant
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Dirk Strothmann’s new campaign for brake shoe Magnic lights is up. For a brief time you can get a complete set for  approx $18. https://www.kickstarter.com/projects/dynamodirk/magnic-microlights-non-contact-driven-brake-shoe-b?ref=nav_search&result=project&term=Magnic


paulheckbert
Moderator
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jonawebb
Participant
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Or, you could just go fully autonomous and ride to work while working:


The Iguana
Participant
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From https://gearjunkie.com/berd-bicycle-spokes-soft-uhmwp-polymer

Freaking Strings! Fabric Bike Spokes Are Stronger Than Steel

Berd PolyLight Spokes: A Significant Change to Bike Wheels
UHMWP is the strongest material on the planet on a per-weight basis. Its popularity stems from its extremely light weight and famous resistance to abrasion, impact, corrosion, and UV damage. Actually, the outdoor industry knows this substance by a number of trade names: Dyneema, Spectra, and Nanofly, for example.

Brands already use it in myriad products, from backpacks to shoe closures to sailboat rigging. The stuff is widely recognized as tougher than nails and super light.

So how does a soft fabric spoke support a wheel? Well, bike wheels (even with steel spokes) use tension to support the wheel. Your spokes don’t act as pillars upon which weight rests. Instead, they are carefully tensioned to maintain – “true” – the wheel’s shape. It can get technical, but put simply, spokes bear tension rather than load.

….

Thus, a fabric spoke can function just as well as a metal one, or, in this case, even better.

 

 

 

 


paulheckbert
Moderator
#

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