Abstract: An ear pad includes an exterior body which is mounted on a headphone and is formed in a ring shape having a hollow internal space, at least a contact surface of the exterior body with a user's temporal region having air permeability when the headphone is worn; and air permeable members placed in the exterior body.

Abstract: A headset of the present invention includes: a housing 10 worn on one auricle of a wearer; an arm 41 having a predetermined length, one end side of which is accommodated in the housing and the other end side of which is pulled out of a hole 13a of the housing to the outside, accommodated in the housing by adjusting the length pulled out of the hole 13a of the housing to the outside; and a microphone attached to the arm 41. When the headset is being used, the end of the arm 41 comes close to the wearer's mouth by pulling the arm 41 out of the housing 10. When the microphone need not be used, the arm 41 is stored in the housing 10 so as not to protrude from the housing 10.

Abstract: A switch-equipped input-output plug available for a voice input-output connector (jack) different from one type of portable phone or the like from another is provided. A connecting portion of a 4-electrode plug, for connecting a manipulate-signal electrode has a screwing portion formed therearound. is used for two types of portable phones respectively equipped with 4-electrode and 3 electrode jacks. Thus, a single type of plug is commonly available for two types of portable phones respectively equipped with 4-electrode and 3 electrode jacks by using an adaptor designed to serve as the manipulate-signal electrode such that the adaptor is screwed with the connecting portion and is detached from the connecting portion, respectively.

Abstract: A switch-equipped input-output plug available for a voice input-output connector (jack) different from one type of portable phone or the like from another is provided. A connecting portion of a 4-electrode plug, for connecting a manipulate-signal electrode has a screwing portion formed therearound. is used for two types of portable phones respectively equipped with 4-electrode and 3 electrode jacks. Thus, a single type of plug is commonly available for two types of portable phones respectively equipped with 4-electrode and 3 electrode jacks by using an adaptor designed to serve as the manipulate-signal electrode such that the adaptor is screwed with the connecting portion and is detached from the connecting portion, respectively.

Abstract: A headset of the present invention includes: a housing 10 worn on one auricle of a wearer; an arm 41 having a predetermined length, one end side of which is accommodated in the housing and the other end side of which is pulled out of a hole 13a of the housing to the outside, accommodated in the housing by adjusting the length pulled out of the hole 13a of the housing to the outside; and a microphone attached to the arm 41. When the headset is being used, the end of the arm 41 comes close to the wearer's mouth by pulling the arm 41 out of the housing 10. When the microphone need not be used, the arm 41 is stored in the housing 10 so as not to protrude from the housing 10.

Abstract: In a speaker which is constructed in a manner that a voice coil bobbin is attached to an inner circumferential portion of a cone type diaphragm while a voice coil is wound around the voice coil bobbin, and the voice coil is inserted into a magnetic gap, the voice coil bobbin is formed of a conductive material and is provided with a gap extending a lengthwise direction so as to form a one-turn voice coil, and the voice coil is fixed to the voice coil bobbin by a soft bonding agent while a very high frequency audio signal is supplied to the one-turn voice coil forming the voice coil bobbin.

Abstract: In a speaker which is constructed in a manner that a voice coil bobbin is attached to an inner circumferential portion of a cone type diaphragm while a voice coil is wound around the voice coil bobbin, and the voice coil is inserted into a magnetic gap, the voice coil bobbin is formed of a conductive material while the voice coil being fixed is the voice coil bobbin by a soft bonding agent, and in a very high range, the voice coil is operated as a driving coil while the voice coil bobbin is operated as a short coil.

Abstract: An electromagnetic induction type acoustic transducer apparatus including a magnetic gap formed between a plate and a pole piece serving as assemblies of a magnetic circuit, a conductive ring attached to a diaphragm, the diaphragm interposed within the magnetic gap for generating sounds when it is vibrated, and a flat coil disposed in the plate or the pole piece at the position opposing the magnetic gap and of which winding is increased from the vibration direction of the diaphragm to the direction perpendicular to the vibration direction of the diaphragm, wherein a width of the magnetic gap can be reduced.

Abstract: An electromagnetic induction type acoustic transducer including a plate as an assembly of a magnetic circuit and having an opening of a predetermined diameter about a central axis, a pole piece as an assembly of the magnetic circuit and protruded on the central axis, having an outer peripheral diameter smaller than the opening of the plate and having an upper surface located lower than a lower surface of an opening peripheral portion of the plate by a predetermined distance, a lower surface portion of the opening peripheral portion of the plate and an upper surface portion of the pole piece constitute a magnetic gap of the magnetic circuit,a diaphragm vibrated in the upper and lower direction on the central axis at the position perpendicular to the central axis in the predetermined distance, an annular ring attached to the diaphragm at the position of the magnetic gap, and a coil attached to the plate and/or pole piece.

Abstract: A headphone includes a pair of housing members into which speaker units and diaphragms are accommodated, protector members having sound radiating portions on which a plurality of sound radiating apertures are bored and respectively provided on the pair of housing members at their sound radiation sides from which sound is radiated by a vibration of the diaphragms, and supporting members for supporting the housing members within a cavum concha of an auricle of a listener's ear so that the sound radiating portion is opposed to the entrance of an external auditory meatus in the auricle of the listener's ear, wherein the housing member has a concave portion that is engaged with one portion of the auricle of the listener's ear when the housing member is fitted into the auricle of the listener's ear.

Abstract: A novel diphenythiazole derivative represented by the following general formula (I): ##STR1## wherein m and n are each 1 or 2; R.sup.1 and R.sup.2 represent each a hydrogen atom, a lower alkyl group, a lower alkoxy group, a lower alkylsulfenyl group, a nitro group, an amino group, a methanesulfonyloxy group or a halogen atom; A.sup.1 represents a lower alkanesulfonyl group, a halogenated lower alkanesulfonyl group, a substituted benzenesulfonyl group, a lower acyl group or a halogenated lower acyl group; and A.sup.2 represents a hydrogen atom, a lower alkanesulfonyl group, a halogenated lower alkanesulfonyl group or a lower alkyl group,and being efficacious as a drug having antiinflammatory, analgesic, antiallergic, uricosuric or platelet aggregation inhibiting effects.

Abstract: A novel phenylalkanoic acid derivative represented by the following formula ##STR1## wherein n is an integer of 1-2, X is a halogen atom, alkoxyl group or nitro group, R is a hydrogen atom or alkyl group, and Z is a hydrogen atom or acyl group,a method for producing said derivative, a method for separating the optical isomers of said derivative from each other, as well as an anti-inflammatory drug, analgesic drug or preparation for external use each containing said derivative.

Abstract: A headphone includes an electro-acoustic transducer, a housing, and first, second and third members. The electro-acoustic transducer includes a diaphragm and is supplied with a signal through a cord. The housing is shaped in such a way as to be accommodated into a concave portion of an auricle and includes an accommodating portion in which the electro-acoustic transducer is accommodated and a projecting portion for leading the cord from the inside of the housing to the outside of the housing. The accommodating portion has a first opening so that the electro-acoustic transducer is exposed to the outside from the first opening. The projecting portion is formed on the rear surface of the accommodating portion. A first member is provided so as to cover the whole surface of the diaphragm and the first opening and is made of a metal material. The first member has a plurality of first openings. A second member is provided on the first member so as to cover the first member and is made of a synthetic resin material.

Abstract: The present invention relates to a so-called bass-reflex electroacoustic transducing apparatus, wherein a plurality of sound ducts (ports) having the same equivalent mass and different lengths are provided in communication with a housing which incorporates therein an electroacoustic transducing element. Thus, resonance and antiresonance generated in respective sound ducts cancel each other out, thereby preventing a tone quality of a reproduced sound from being deteriorated.