HELMHOLTZ RESONATOR TYPE MUFFLER

PROBLEM TO BE SOLVED: To provide a helmholtz resonator type muffler capable of further improving muffling effect without offsetting resonance vibration frequency from frequency of muffling target sound.SOLUTION: The helmholtz resonator type muffler comprises a cavity part and a communication hole 18...

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Bibliographische Detailangaben
1. Verfasser:	ORIMOTO YUKIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR AXLES FOR WHEELS OR CASTORS CASTORS INCREASING WHEEL ADHESION METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES TRANSPORTING VEHICLE WHEELS VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a helmholtz resonator type muffler capable of further improving muffling effect without offsetting resonance vibration frequency from frequency of muffling target sound.SOLUTION: The helmholtz resonator type muffler comprises a cavity part and a communication hole 18a communicating the cavity part to the outside. The communication hole 18a has a notch part 18c on an inner peripheral surface 18b of a shell 18 so as to enhance viscosity resistance generated between air in the communication hole 18a which is vibrating and a surface of the communication hole 18a.