Increase Your Margin of Safety:  Don't let Sound Masking Wind Noise Interfere with Situational Awareness and Communications

 >  Hear / react to approaching cyclists and vehicles sooner
>  Easier communications with other cyclists     >  Protect ears / hearing from wind noise

Wind Noise Measurement / Mitigation Testing - Boulder, Colorado

"Wrap this half inch pile material around your helmet strap to reduce wind noise in your ears... so can more easily hear cars coming and friends talking." Erin Beresini, Outside Magazine

The Best Selling and Most Effective Wind Noise Reduction Products for Cyclists.

Over 75,000 customers in 50+ countries.  Over 750 unsolicited testimonials.

Our products are 100% Satisfaction Guaranteed and Made in the USA.

​Now available through Amazon | Prime at our Enhanced Brand Store

Cat-Ears / AirStreamz are the Best Selling and Highest Rated wind noise reduction products on Amazon.

Cat-Ears / AirStreamz are Amazon's Choice and frequent #1 Best Seller / Read More Here

Our patented approach and proprietary materials reduce the most wind noise.

Cat-Ears / AirStreamz are the highest rated wind noise reduction products for cyclists.

Road, trail, wind tunnel, and hydrodynamic flume tested. 

AirStreamz dampen, dissipate, and deflect oncoming wind - reducing the intensity of wind noise producing turbulence.


"The average person facing a 21 mph wind experiences wind noise at an intensity of 92 dB."

(Experiments on the Noise Heard by Human Beings when Exposed to Atmospheric Winds, NTNU, Trondheim, Norway)

  • We invite you to 'Hear the Difference'  - How Cat-Ears / AirStreamz work at 15 miles per hour.

Wind Noise at 15 miles per hour (without Cat-Ears / AirStreamz)

Wind Noise - @ 15 mph (baseline)
00:00 / 00:00

Wind Noise at 15 miles per hour using patented Cat-Ears / AirStreamz

Wind Noise @ 15 mph - using Cat-Ears A/S
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  • We test our products at different speeds (10-35 mph), turbulence levels, and yaw / pitch variations.

Our Favorite Cycling Wind Gear

"With Cat-Ears, I found I was enjoying rides more... Simply because I could hear more of what I wanted and less of what I didn't."

Joe Lindsey, Bicycling Magazine

Triathlon Essentials

"Wrap this half inch pile material around your helmet strap to reduce wind noise in your ears... so can more easily hear cars coming and friends talking."

Erin Beresini, Outside Magazine

"Cat-Ears work well at reducing wind noise, particularly at higher speeds. Allowing improved awareness of surrounding traffic and racers. I heard little more than tires, gears, and birds on my morning ride."

Technical Editor, BikeRadar

"I can't say enough good things about this product. Wind Noise can inhibit one's ability to distinguish traffic noise, often a first line of defense in an urban setting. Cat-Ears don't restrict hearing while others I've tried do."

Patrick Finley, Adventure Cycling Association

"Do they work? Yes, as advertised, Cat-Ears turn down the volume on wind noise. We logged a handful of rides wearing the Classic model and found it easier to hear traffic and carry on conversations."​

Jason Sumner, / Bicycling / MTBR

Aeroacoustic techniques in engineering were pioneered by engineers investigating noise generation and acoustic signatures in military and defense applications. In civil industries, aeroacoustic noise is increasingly a hot topic for engineers working in ground / air transport, industrial machinery, concert hall acoustics, environmental conditions, as well as complex fluid-structure interactions. Our increased awareness of the adverse effects of noise annoyance has led to aero-acoustically generated noise being identified as a critical design variable in modern engineering design...


Wind Noise

Wind noise is a complex phenomenon spanning aerodynamics, acoustics, and the physiology of human hearing.  The amount experienced depends on factors like: 1) speed, 2) riding position, 3) turbulence, and so on.   Wind noise impacts the ability to hear surrounding sounds.



The theory of aero-acoustics, the physics describing wind noise, is difficult and not complete.  Location of the sources of wind noise via measurement is very challenging and requires specialized test facilities and equipment.  Understanding the theory and its implications for measurement and analysis is critical for designing the most effective wind noise reduction products for cyclists.

Exhaustive Testing

Exhaustive testing ensures that our products are the most effective of their kind on the market.​​ We use precision audio recording equipment, spectral analysis software, CT (hot-wire) anemometers / pressure probes, and high resolution imaging tools.  In addition to 'stress testing' in 'designed use' environments, we incorporate laboratory testing in custom built facilities, including:


 •  Two open jet quiet wind tunnels with controllable speed and turbulence.

 •  A hydrodynamic (water) flume using fluorescein dye for flow visualization.

 Our products are road and laboratory tested at speeds up to 40 mph - with variable turbulence.

Materials Engineering

Materials engineering is important.  We incorporate characteristics like porosity, texture, permeability (k), resilience, etc.  Engineered fluid (air) flow requirements demand unique material characteristics and we hold utility patent #US 9078482 (Sound Permeable Wind Noise Reduction Device).


Acoustic Transparency

Acoustic transparency is critical for situational awareness when cycling.  While some products incorporate materials that block or deflect sound transmission - including desired sounds, we focus on optimizing the signal to wind noise ratio. Clear communications, and pinpointing the location of sound sources, are important.  Our products are tested for acoustic transparency / sound source localization.

We stand behind our products as the most effective devices of their kind on the market.

Cat-Ears / AirStreamz is the leading manufacturer of aero-acoustically designed passive wind noise reduction products for serious cyclists. Tested and recommended by respected publications and professionals, Cat-Ears / AirStreamz are the highest rated and best selling products designed for cyclists.  They are 100% Satisfaction Guaranteed and Made in the USA.

Cat-Ears, LLC

PO Box 21

Cedaredge, CO 81413



Mon - Fri: 9:30am - 4:30pm | ​​Closed Saturday and Sunday

Sound Solutions™ | Reducing Wind Noise Through Sound Engineering

Safer Cycling Through Sound Engineering™ | Look Ahead Hear Behind™ | Sight Sound Safety

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