Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
65 words
An acoustic apparatus comprising: a Helmholtz resonator having an open duct port, and a vibrator which is arranged in the resonator and driven to cause the resonator to radiate a resonant acoustic wave, said open duct port comprising an air permeable member which has a proper acoustic resistance and a viscoelastic member which has no air permeability and is attached to said air permeable member.
Claim 2
Dependent Claim
65 words
An acoustic apparatus comprising: a Helmholtz resonator having an open duct port, and a vibrator which is arranged in the resonator and driven to cause the resonator to radiate a resonant acoustic wave, said open duct port comprising an air permeable member which has a proper acoustic resistance and a viscoelastic member which has no air permeability and is attached to said air permeable member.
Claim 3
Dependent Claim
58 words
An apparatus according to claim 1, wherein said air permeable member is formed into a cylindrical shape, said viscoelastic member is disposed at front and rear portions of said cylindrical air permeable member, and a central portion of said cylindrical air permeable member is exposed as a portion of an outer peripheral wall of said open duct port.
Claim 4
Dependent Claim
30 words
An apparatus according to claim 1 or 2, wherein said vibrator is driven by an electrical servo to cancel an air counteraction from said resonator when said resonator is driven.
Claim 5
Dependent Claim
62 words
An acoustic apparatus comprising: a Helmholtz resonator having a cavity and an open duct port for causing said cavity to communicate with an external region, a vibrator which is arranged in the resonator and driven to cause the resonator to radiate a resonant acoustic wave, and a viscoelastic member inserted at a mounting portion between said open duct port and said cavity.
Claim 6
Dependent Claim
62 words
An acoustic apparatus comprising: a Helmholtz resonator having a cavity and an open duct port for causing said cavity to communicate with an external region, a vibrator which is arranged in the resonator and driven to cause the resonator to radiate a resonant acoustic wave, and a viscoelastic member inserted at a mounting portion between said open duct port and said cavity.
Claim 7
Dependent Claim
28 words
An apparatus according to claim 4, wherein said vibrator is driven by an electrical servo to cancel an air counteraction from said resonator when said resonator is driven.
Claim 8
Dependent Claim
76 words
An acoustic apparatus comprising: a Helmholtz resonator having a cavity and an open duct port, a vibrator which is arranged in the resonator and driven to radiate a resonant acoustic wave from said open duct port, and an ornament grille attached to a front surface of said acoustic apparatus, the grille having a portion which has a larger air permeability than other portions at the place opposite to the opening portion of said open duct port.
Claim 9
Dependent Claim
76 words
An acoustic apparatus comprising: a Helmholtz resonator having a cavity and an open duct port, a vibrator which is arranged in the resonator and driven to radiate a resonant acoustic wave from said open duct port, and an ornament grille attached to a front surface of said acoustic apparatus, the grille having a portion which has a larger air permeability than other portions at the place opposite to the opening portion of said open duct port.
Claim 10
Dependent Claim
28 words
An apparatus according to claim 6, wherein said vibrator is driven by an electrical servo to cancel an air counteraction from said resonator when said resonator is driven.
Claim 11
Dependent Claim
38 words
An apparatus according to claim 1, wherein said viscoelastics member of the open duct port functions as both a portion of the open duct port and a fixing member for fixing said open duct port and said cavity.
Claim 12
Dependent Claim
40 words
An apparatus according to claim 6, wherein said open duct port is connected with said ornament grill and formed larger in said air permeability. than other portions at the place opposite to the opening portion of said open duct port.
Claim 13
Dependent Claim
27 words
An apparatus according to claim 1, wherein at least one end of said open duct port is expanded in curvature to be made in a horn-like shape.