SOUND REPRODUCTION DEVICE

• Main Authors: SAGAWA HIROYUKI, MIURA MASAMI, INANAGA KIYOFUMI, IIDA YASUHIRO
• Format: Patent
• Language: English
• Published: 05.04.1990
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; PUBLIC ADDRESS SYSTEMS; SOUND-PRODUCING DEVICES

PURPOSE:To remove an oppressive sensation and to obtain a good stability outside a head by making the opening end part of an opposite side to the ear insersion part of an acoustic tube into a sound non-reflection end. CONSTITUTION:The respective one opening end parts of a pair of acoustic tubes 1L and 1R are made into a pair of ear insersion parts 2L and 2R. An acoustic signal being reflected by respective tympanums pL and pR is propagated toward the opening end parts 3L and 3R of the other side corresponding in the respective sound tubes 1L and 1R, however the opening end parts pL and pR of the other side are made a sound non-reflection end. Consequently, the acoustic signal which reaches the respective tympanums pL and pR and is reflected by the tympanums pL and pR no longer reaches the respective tympanums pL and pR again. Thus, the sense of a normal position inside the head and the generation of the oppressive sensation are prevented.