Abstract: A low-cost, small-size Wilkinson-type combiner that suppresses the risk of damaging an isolation resistor due to combination loss is provided. The combiner comprises first and second input terminals to which RF signals are input; an output terminal; a wiring line that combines the RF signals input to the first and second input terminals, and outputs the combined signal to the output terminal; an isolation unit provided between the first and second input terminals and formed by a first isolation resistor, a transformer, and a second isolation resistor connected in series; a detection circuit connected to a secondary coil of the transformer and configured to detect a current flowing in the secondary coil; and a determination circuit that outputs a control signal to block input of RF signals to the first and second input terminals if the current flowing in the isolation unit and detected by the detection circuit is higher than or equal to a prescribed value.

Abstract: A low-cost, small-size Wilkinson-type combiner that suppresses the risk of damaging an isolation resistor due to combination loss is provided. The combiner comprises first and second input terminals to which RF signals are input; an output terminal; a wiring line that combines the RF signals input to the first and second input terminals, and outputs the combined signal to the output terminal; an isolation unit provided between the first and second input terminals and formed by a first isolation resistor, a transformer, and a second isolation resistor connected in series; a detection circuit connected to a secondary coil of the transformer and configured to detect a current flowing in the secondary coil; and a determination circuit that outputs a control signal to block input of RF signals to the first and second input terminals if the current flowing in the isolation unit and detected by the detection circuit is higher than or equal to a prescribed value.

Abstract: A key unit includes: a base portion that is fixable to a musical instrument body that includes a tube body; a key post that projects from the base portion; a key shaft that is attached to the key post; and a key that is attached to the key shaft.

Abstract: A wind instrument includes a tube body; a tone hole tube that has an inner open end formed extending from the outer periphery of the tube body and opening to the inside of the tube body, and an outer open end opening to the outside of the tube body; and a finger pressing plate that, in the radial direction of the tone hole tube, extends from the outer open end of the tone hole tube to the outside of the tone hole tube.

Abstract: A mute is provided that can be stored together with a wind instrument. A mute comprises a main body portion, a rod-like member, and an inner head. The main body portion comprises a body, a head, and a connecting member. When in use, a large diameter end of the body is connected to a large diameter end of the head. When the inner head is in a bell, the body is fixed to the inner circumferential face of the bell. For storage, the mute is reassembled into a mode for storage in which the body is separated from the head, the head is in the head, and the inner head is in the head. The entire mute reassembled into this mode is in the bell.

Abstract: A wind instrument includes: a tube body; and a plurality of tone hole tubes each having an outer open end formed at the outer periphery of the tube body and an inner open end formed through the outer opening end and opening to the inside of the tube body, wherein at least one of the tube body and the tone hole tube is curved such that the plurality of outer open ends of the plurality of tone hole tubes are disposed so as to be in positions corresponding to respective fingers of the performer, and the plurality of inner open ends are connected at positions that cause the tube body to produce a predetermined pitch.

Abstract: A key unit includes: a base portion that is fixable to a musical instrument body that includes a tube body; a key post that projects from the base portion; a key shaft that is attached to the key post; and a key that is attached to the key shaft.

Abstract: A wind instrument includes: a tube body; and a plurality of tone hole tubes each having an outer open end formed at the outer periphery of the tube body and an inner open end formed through the outer opening end and opening to the inside of the tube body, wherein at least one of the tube body and the tone hole tube is curved such that the plurality of outer open ends of the plurality of tone hole tubes are disposed so as to be in positions corresponding to respective fingers of the performer, and the plurality of inner open ends are connected at positions that cause the tube body to produce a predetermined pitch.

Abstract: A wind instrument includes a tube body; a tone hole tube that has an inner open end formed extending from the outer periphery of the tube body and opening to the inside of the tube body, and an outer open end opening to the outside of the tube body; and a finger pressing plate that, in the radial direction of the tone hole tube, extends from the outer open end of the tone hole tube to the outside of the tone hole tube.

Abstract: A mute is provided that can be stored together with a wind instrument. A mute comprises a main body portion, a rod-like member, and an inner head. The main body portion comprises a body, a head, and a connecting member. When in use, a large diameter end of the body is connected to a large diameter end of the head. When the inner head is in a bell, the body is fixed to the inner circumferential face of the bell. For storage, the mute is reassembled into a mode for storage in which the body is separated from the head, the head is in the head, and the inner head is in the head. The entire mute reassembled into this mode is in the bell.

Abstract: A silencer for a wind instrument includes a hollow pipe whose one end is closed and serves as a closed end. The pipe includes an outer wall having at least one of at least one recessed portion and at least one protruding portion on a portion of the outer wall near the closed end.

Abstract: 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.

Abstract: 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.

Abstract: An electric stringed musical instrument includes: a string which vibrates by a performance operation; a body which supports the string via a bridge; a pickup sensor mounted on a portion which vibrates by a vibration of the string, the pickup sensor being configured to detect a vibration having propagated from the string and output an electric signal; a supporter having a spring structure which supports the bridge with respect to the body; and a damper mounted on a portion which vibrates by a vibration of the string, the damper being configured to damp a vibration of the bridge.

Abstract: A silencer includes: a hollow main body to be inserted in a bell of a wind instrument and including (a) a rear end portion serving as an opening portion and (b) a front end portion serving as a closing portion; and a flow-path adjuster supported by the main body in the bell and configured to narrow a path through which a breath of a player of the wind instrument is delivered into the main body. The front end portion of the main body is located near a frontmost portion of the bell or at a rear of the frontmost portion in a state in which the main body in mounted in the bell.

Abstract: An electric stringed musical instrument including: a string which vibrates by a performance operation; a body which supports the string via a bridge; a pickup sensor mounted on a portion which vibrates by a vibration of the string, the pickup sensor being configured to detect a vibration having propagated from the string and output an electric signal; and a supporter having a spring structure which supports the bridge with respect to the body to bring a vibration characteristic of the electric stringed musical instrument closer to a vibration characteristic of one acoustic stringed musical instrument.

Abstract: A silencer includes: a main body including (a) a cylindrical portion whose outer circumferential surface is mounted on an inner circumferential surface of a bell of a wind instrument and (b) a closing portion configured to close one end portion of opposite end portions of the cylindrical portion; and a pipe including (i) a first end portion opening inside the main body and (b) a second end portion opening outside the main body. The first end portion of the pipe is disposed at a vicinity of the closing portion. The pipe is bent between the first end portion and the second end portion.

Abstract: A mute detachably attached to a brass instrument includes a fixed part and a plurality of branch pipes, each including a main pipe and an auxiliary pipe. The branch pipes are unified together and inserted into a bell pipe of a brass instrument. The fixed part is attached to the tapered portion of a bell pipe and interposed between the interior of the bell pipe and the exterior of the main pipe. The branch pipe is designed such that the auxiliary pipe is connected to the main pipe at an interconnect part, at which an air flow propagating through the main pipe is partly branched into the auxiliary pipe.