One comment on “Bring the Noise

  1. Going to the Dogs…

    Sound regulations also may eventually apply to traditional internal combustion engines, which are getting smaller and quieter every year because of increasingly tough emissions standards, Mr. Roussarie says. Mr. Hubert of UNECE says electric bicycles and mopeds also may be affected.

    One challenge researchers have identified is to produce a sound that guide dogs for the blind can identify as an approaching car.

    “Technically, it’s not a problem to insert high-frequency sounds that only dogs can hear. The problem is to avoid a car waking up all the dogs in a neighborhood as it passes through,” Mr. Roussarie says. The dog-audible frequency would be blended into the main sound, Mr. Roussarie explains.

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