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Cooper became the official tire of the IMSA Prototype Lites series (formerly IMSA Lites) in 2010. [25] Cooper Tires is the official supplier of the Mazda Road to Indy formula ladder: USF2000 (since 2010), Pro Mazda (since 2013), and Indy Lights (since 2014). As of 2014, Cooper is the official supplier of the FIA World Rallycross Championship. [26]
Roadway noise is the collective sound energy emanating from motor vehicles. It consists chiefly of road surface, tire, engine/transmission, aerodynamic, and braking elements. Noise of rolling tires driving on pavement is found to be the biggest contributor of highway noise and increases with higher vehicle speeds. [1] [2] [3]
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Active noise cancelling (ANC) is a software process that uses existing in-vehicle infotainment hardware to eliminate undesirable noise within the interior of a vehicle. This elimination technique is known as harmonic order reduction, where unwanted audio signals are identified by sensors and filtered out of the overall interior vehicle sound. [ 3 ]
Rumble strip installation is widespread, and in some cases controversial. Residents near urban freeways complain of noise at night as vehicles change lanes; or when vehicles strike the transverse rumble strips. The encroachment of shoulder rumble strips onto highways with narrow shoulders may create a hazard for cyclists.
The fundamental Schumann resonance is at approximately 7.83 Hz, the frequency at which the wavelength equals the circumference of the Earth, and higher harmonics occur at 14.1, 20.3, 26.4, and 32.4 Hz, etc. Lightning strikes excite these resonances, causing the Earth–ionosphere cavity to "ring" like a bell, resulting in a peak in the noise ...
D.B. Cooper's Skyjacking, Explained "Onboard the Boeing jet, [Cooper] had a bourbon and soda, smoked cigarettes, and gave a flight attendant a note that said he had a bomb," Biography reports.
ATRAC was developed for Sony's MiniDisc format. ATRAC was updated with version 2, then version 3, version 4, version 4.5, and Type R and Type S. [2] The first major update was ATRAC3 (not to be confused with version 3 of original ATRAC) in 1999. [3]