摘要:
A wind instrument is constituted of a mouthpiece and a pipe structure including tapered/straight pipes. The pipe structure is constituted of a blow member and a branch pipe. The branch pipe is branched into a main pipe and an auxiliary pipe, which are straight pipes having openings and connected together in a branch shape. The blow member is connected to a branch point of the branch pipe. The branch pipe simulates resonance characteristic of a tapered pipe having a predetermined length, a predetermined distance between the upper base and the vertex, and a predetermined sectional area of the upper base commensurate with the sectional area of the main pipe.
摘要:
A voice signal transmitting/receiving apparatus includes: a device body; a speaker array arranged in the device body and including a plurality of arrayed speaker units; and a microphone array arranged in the device body and including a plurality of arrayed microphones. By thus integrating the speaker array and the microphone array, it is possible to improve the operability of a user, to acquaint the user relatively easily with the error in the set position and to make the device compact.
摘要:
An acoustic drum or electronic percussion instrument is constructed by a drumhead corresponding to a punching sheet on which plenty of apertures are formed and a cylinder covered with the drumhead being stretched under tension as well as a muting structure which is realized by a vibration absorption member and a support structure containing L-shaped support members and a support plate. Herein, the support members are detachably attached to an interior periphery of the cylinder to support the support plate, on which the vibration absorption member is mounted and is arranged in contact with a backside surface of the drumhead to absorb vibration of the drumhead whose surface is being struck by a drumstick or else. Using the muting structure, it is possible to actualize mute performance in which drum sounds are being muted by reduction of the vibration of the drumhead propagating into the air. It is possible to form plenty of projections on an upper surface of the vibration absorption member, or it is possible to provide a reinforce member being attached to the backside surface of the drumhead. In addition, it is possible to provide the support structure with a vertical adjustment function by which the vibration absorption member is manually moved in a vertical direction along the interior periphery of the cylinder, so that the vibration absorption member is selectively arranged in contact with the backside surface of the drumhead.
摘要:
An acoustic drum or electronic percussion instrument is constructed by a drumhead corresponding to a punching sheet on which plenty of apertures are formed and a cylinder covered with the drumhead being stretched under tension as well as a muting structure which is realized by a vibration absorption member and a support structure containing L-shaped support members and a support plate. Herein, the support members are detachably attached to an interior periphery of the cylinder to support the support plate, on which the vibration absorption member is mounted and is arranged in contact with a backside surface of the drumhead to absorb vibration of the drumhead whose surface is being struck by a drumstick or else. Using the muting structure, it is possible to actualize mute performance in which drum sounds are being muted by reduction of the vibration of the drumhead propagating into the air. It is possible to form plenty of projections on an upper surface of the vibration absorption member, or it is possible to provide a reinforce member being attached to the backside surface of the drumhead. In addition, it is possible to provide the support structure with a vertical adjustment function by which the vibration absorption member is manually moved in a vertical direction along the interior periphery of the cylinder, so that the vibration absorption member is selectively arranged in contact with the backside surface of the drumhead.
摘要:
An electronic percussion instrument has a covering section 7A for covering the rim switch 5 on the outer periphery of a pad member 7 and a switch compression section 13 and two grooves 14 are provided on the back surface of the covering section 7A. In the switch compression section 13, a pressing surface 13a is made into a curved surface protruding towards the rim switch 5. The result is that striking forces for pressing the rim switch 5 are concentrated on the switch compression section 13 so as to enable to reliably and effectively transmit the forces to the rim switch 5 by elastic deformation of the switch compression section 13, regardless of the hitting direction of the drumstick on the rim section.
摘要:
An electronic cymbal (10) has a first cymbal unit (12) for normal playing and a second cymbal unit (13) for cup playing which are vertically separated and attached to a common instrument holder (11). The second cymbal unit (13) of a smaller size than the first cymbal unit (12) is positioned above the first cymbal unit (12) with an intervening felt washer (22). Transducers (15, 19) are provided on the back surface of respective cymbal units (12, 13).
摘要:
A wind instrument is constituted of a mouthpiece and a pipe structure including tapered/straight pipes. The pipe structure is constituted of a blow member and a branch pipe. The branch pipe is branched into a main pipe and an auxiliary pipe, which are straight pipes having openings and connected together in a branch shape. The blow member is connected to a branch point of the branch pipe. The branch pipe simulates resonance characteristic of a tapered pipe having a predetermined length, a predetermined distance between the upper base and the vertex, and a predetermined sectional area of the upper base commensurate with the sectional area of the main pipe.
摘要:
The invention provides a sound collection device having little error in a desired directivity. The sound collection device includes a unidirectional microphone 12A, a unidirectional microphone 12B, and a unidirectional microphone 12C which are arranged on one plane. Each of the unidirectional microphones has the maximum sensitivity direction directed toward the inside of the arrangement. Each of the unidirectional microphones has a rear surface (direction of the minimum sensitivity) being open acoustically. Since the maximum sensitivity direction of each of the unidirectional microphones is directed toward the inside of the arrangement, the oscillation plane of each of the unidirectional microphones can be positioned substantially at the center of the arrangement. Thus, by adjusting the gain of the sound collected by the respective unidirectional microphones, the directivity can be freely formed on a flat plane with little error.
摘要:
A sound pickup apparatus, which can control directionality and has a simple structure, and in which a plurality of microphones can be provided so as to be floated by using the small number of parts, is provided. Three support columns 13A to 13C having the same length are provided upright on a top surface of a housing 11 of a sound pickup apparatus 1. The support columns 13A to 13C are equidistantly arranged away from a center position of the housing 11 and equally spaced 120 degrees apart from each other. A frame 4 having microphone frames 14A to 14C in which microphones are fitted is arranged above the top surface of the housing 11. In addition, the microphone frames 14A to 14C are coupled to the support columns 13A to 13C of the housing 11 by elastic rubbers 15A to 15C in a state where tensile stress passes the center of the housing 11 and is generated in an outward direction.
摘要:
An electronic drum has a drum pad beaten with sticks and a pad structure, a sensor board attached to the pad structure and an piezoelectric element attached to the sensor board form in combination the drum pad; the sensor board is formed of cellular vinyl chloride with an internal loss or tangent-delta equal to or greater than 0.02 so that the vibrations propagated to the sensor board have a constant amplitude.