Oto ni yoru kaitensū no sokutei shuhō no kentō chōsa gyōmu
Subtitle: Heisei 21-nendo Kankyōshō ukeoi gyōmu kekka hōkokusho
Publisher: Nihon Jidōsha Kenkyūjo
Published: 2009
Place of publication: [Tōkyō-to Minato-ku]
Language: jpn
Number of pages: 32
Subjects: Automobiles; Motors; Measurement; Mufflers; Automobile sounds
Notes: Cover title.

Includes bibliographical references.

Summary in English.