Subjective Preference for Air-Conditioner Sounds inside A Car In Summer and Winter

The sound quality inside a car is a very important aspect of automobile design. Many different sources produce sounds that can be heard inside a car. Previous studies have investigated the sound quality of the sources, such as those produced by the engine [1,2], door closing [3,4], and power windows [5,6]. Recent developments in vehicle design have led to a reduction in various sound levels, principally those produced by the engine. Thus, the contribution pattern of sound sources to the overall interior sound inside a car has changed. Previously masked sound sources, such as those produced by the airconditioner, have become noticeable to passengers, and are therefore playing a heightened role in passenger comfort.