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US RE39,330 E1Granted
Speaker system and a method for improving sound quality thereof
OwnerKatsutoshi Tozawainventor
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OwnerKatsutoshi Tozawainventor
Estimating the term…
A speaker system suppresses standing waves generated in the system and reproduces clear and dynamic bass sound. The system includes a cabinet formed of acoustic insulation walls, and at least one partition wall situated inside the cabinet to form a space by surrounding the space. The partition wall suppresses the standing waves generated inside the cabinet and is formed of a material having high internal loss. The space has a total capacity more than one tenth of a capacity of the cabinet, wherein a closed end of the partition wall is located between one-half and four-fifths of a distance from one end to the other end, and an opening area of the same partition wall is located at a side opposite to the closed end in a longitudinal direction of the cabinet. The opening area is located between four-fifths and five fifths of a distance from one end to the other end. The material has a density per volume greater than 0.1 g/cm3, a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for the standing waves. The partition wall has a closed end portion. The closed end portion is formed of at least one of the partition wall and the acoustic isolation walls. The space is a substantially closed space.
A speaker system for a speaker comprising, ;
A method of improving sound quality of a speaker system having a cabinet formed of an acoustic isolation wall walls, said cabinet having a maximum length L among width, depth and height of an inside of the cabinet, comprising forming at least one partition wall to form a space for suppressing standing waves generated inside the cabinet by a sound source and a closed end portion surrounding the space, at least a part of said partition wall being formed of a material which has high internal loss and a density per volume greater than 0.1 g/cm3, and said closed end portion being formed of at least one of the partition wall and the acoustic isolation wall walls wherein said material has a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for at least two kinds of standing waves of wavelengths of the length L and twice of said length L among the standing waves, said space is a substatially substantially closed space, and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt uninterrupted by any protrusion which reflects said two kinds of standing waves.
A speaker system for a speaker comprising, :
A method of suppressing standing waves generated inside a cabinet by a sound source, said cabinet being formed of an acoustic isolation wall walls, said cabinet comprising forming at least one partition wall to form a space and a closed end portion surrounding the space, at least a part of said partition wall being formed of a material which has high internal loss and a density per volume greater than 0.1 g/cm3, and said closed end portion being formed of at least one of the partition wall and the acoustic isolation wall walls, wherein said material has a density per area from 0.01 g/cm2 to 0.21 g/cm2 and a characteristic of semi-transmission for the standing waves, said space is a closed space, and a surface of said partition wall directed toward the sound source is substantially flat and uninterrupt uninterrupted by any protrusion which reflects said standing waves.
Dependencies are inferred from the claim text.