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

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.

Our Favorite Cycling Wind Gear 

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

G. Liu / J. Lindsay, Bicycling Magazine

Triathlon Essentials for Racing Fast, Training Hard, and Having Fun

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

Erin Beresini, Outside Magazine 

Our patented technology 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. 

Cat-Ears / AirStreamz are also Amazon Best Sellers.

According to Amazon, our products are the Best Selling and Highest Rated.

Please visit our Amazon Store if you prefer to purchase our products through Amazon.

"It has been said that 'the purpose of the ears is to point the eyes.'

While the ability of the auditory system to localize sound sources is just one component of our perceptual systems, it has high survival value."  (ECE Department, University of California - Davis)

"I turn my head about 20-30° to reduce wind noise when talking or listening to someone when I ride.

However, this probably isn't a good idea for long conversations or watching where you're going."

(comment from a major cycling forum)

"The car that will kill you is the one you don't see."

"A major study by the League of American Bicyclists finds that the most likely type of fatal bicycle crash is 'motorist overtaking bicycle' - i.e. being struck from behind - accounting for forty percent of cyclist fatalities.”

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

Wind Noise - @ 15 mph (baseline)
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  • 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.

"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)

Hear the Difference - How Cat-Ears / AirStreamz work at 15 miles per hour.  

Wind Noise

Wind noise is a complex phenomenon spanning aerodynamics, acoustics, and the physiology of human hearing.  The amount of acoustic noise generated 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 the generation of sound by unsteady air flow, is difficult and not complete.  Location of the sources of wind noise via measurement is challenging and requires specialized test facilities and equipment.  Understanding the fundamental theory, and its implications for measurement and mitigation, is critical for designing the most effective wind noise reduction products.

Exhaustive Testing

Exhaustive testing ensures that our products are the most effective devices of their kind.​​  We use precision recording equipment, professional spectral analysis software, CT (hot-wire) anemometers / pressure probes, and high resolution flow visualization imaging tools.  In addition to testing in designed use environments, we incorporate more controlled and repeatable laboratory testing in our 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 / wind tunnel tested at speeds up to 35 mph - with variable turbulence.

Materials Engineering

The importance of materials engineering cannot be overstated. We incorporate characteristics like texture, porosity, permeability (flow resistance), resilience, etc.  Effectively combining external and internal flow requirements demands unique material characteristics and blending for optimal performance.  Our unique materials significantly reduce both wind velocity and turbulence vorticity. In this regard, we are the only company to hold a cycling related wind noise reduction (WNR) utility patent (USPTO #9078482 - Sound Permeable Wind Noise Reduction Device).

Acoustic Transparency

Acoustic transparency is critical for situational awareness when cycling.  An understanding of material properties and acoustics is necessary to successfully develop materials with minimal acoustic absorption.  While some WNR products incorporate materials that block or reflect desired sounds, we focus on optimizing the signal to wind noise ratio. Clear communications and pinpointing the location of surrounding sound sources can be important.  Our products are tested for acoustic transparency / sound source localization (including material testing at Antioch University).

Cat-Ears Develops Exceptional Wind Noise Reduction Products

The unique properties of our proprietary pile materials contribute to unsurpassed WNR performance.

In this regard, Cat-Ears products are specifically designed to be very effective in extreme wind situations.

And our custom microphone windscreens have been selected by highly respected companies and organizations.

Aeroacoustic research is important to us.  Contact us for details regarding consulting / academic partnering.



Innovative wind noise reduction solutions since 2012.

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

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

Cat-Ears / AirStreamz | Aeroacoustic Engineering Research and Product Development

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

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