EARPHONE HAVING SOUND INSULATION MEANS
First Claim
1. An earphone in which:
- an inner earphone is defined as an earphone,{environmental noise reaching an auditory sense via an earphone structure} is defined as entrance noise A,{environmental noise reaching the auditory sense via a gap formed between the earphone and a {wall of an {external ear}} is defined as entrance noise B,{sound reaching the auditory sense} of regeneration sound of the earphone is defines as entrance regeneration sound,{deformable sound insulation porous plastic} to {fill a space formed near an entrance of the earphone and an external auditory canal} is defined as a sound insulation element,a hole {through which a {hollow tube to be described later is inserted in the sound insulation element}} is defined as a hollow tube insertion hole,the hollow tube insertion hole has a cup shape with one side closed and the other side opened,an {opened side} of a {hole of the sound insulation element} is defined as an earphone mounting section,a {closed side} of the {hole of the sound insulation element} is defined as a sound insulation section,a {side along an axis} of the {hole of the sound insulation element} is defined as a sound insulation side,an {empty tube having both} of a {function of being mounting on radiating holes of sound of the earphone} and a {function of combining the earphone and the sound insulation element by being inserted in the hole of the sound insulation element} is defined as a hollow tube;
the hollow tube has;
a {function as an aggregate of a {deformable soft sound insulation element}};
a {function of compressing {the sound insulation side and the sound insulation section} of the {sound insulation element filling a gap} between {the wall of the external ear} and the {hollow tube};
a {{function of attenuating the entrance noise B} by compressing a portion contacting the sound insulation side of the sound insulation element, i.e., the {wall of the external ear near the entrance of the external auditory canal}}; and
a function of attenuating {the entrance noise A, the entrance noise B, and the entrance regeneration sound} altogether by compressing the sound insulation section of the sound insulation element, i.e., {the vicinity of a space at the entrance of the external ear},a combination of the sound insulation element and the hollow tube is defined as a composite sound insulation element,an {{attenuation characteristic} or {dependency of the attenuation characteristic on frequency}} of a {{transmission characteristic of the entrance regeneration sound} of the {sound insulation element or composite sound insulation element}} is defined as an entrance regeneration sound attenuation characteristic,a function of compensating the entrance regeneration sound attenuation characteristic is defined as a high sound range attenuation compensation function,an earphone having a {regeneration characteristic of the high sound range attenuation compensation function} is defined as a high sound range attenuation compensation type earphone,an {electronic circuit or electrical circuit} having a characteristic of the high sound range attenuation compensation function is defined as a high sound range attenuation compensation circuit,an earphone {mounted with the composite sound insulation element} is defined as a first characteristic,an {earphone having the high sound range attenuation compensation circuit at any place} between the {voice coil of the earphone} and the {earphone plug} is defined as a second characteristic, anda high sound range attenuation compensation type earphone {mounted with the composite sound insulation element} is defined as a third characteristic,wherein the earphone is the {earphone having the first and second characteristics} or the {earphone having the third characteristic},
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Accused Products
Abstract
The present invention relates to an inexpensive environmental noise reduction type inner earphone which allows a user to listen music with high quality of sound and with a small volume under noisy environments making noise of 86 dB or more such as in aircraft seats, subways, trains and so on, and particularly which is capable of blocking a high level of environmental noise and regeneration sound passing through the inner earphone by filling a space formed between an ear and the inner earphone with a sound insulation element made of porous soft plastic. The earphone includes a frequency characteristic correction circuit which serves to correct a sound insulation characteristic of the sound insulation element between a voice coil of the earphone and a plug of the earphone and includes a resistor and a capacitor.
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Citations
9 Claims
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1. An earphone in which:
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an inner earphone is defined as an earphone, {environmental noise reaching an auditory sense via an earphone structure} is defined as entrance noise A, {environmental noise reaching the auditory sense via a gap formed between the earphone and a {wall of an {external ear}} is defined as entrance noise B, {sound reaching the auditory sense} of regeneration sound of the earphone is defines as entrance regeneration sound, {deformable sound insulation porous plastic} to {fill a space formed near an entrance of the earphone and an external auditory canal} is defined as a sound insulation element, a hole {through which a {hollow tube to be described later is inserted in the sound insulation element}} is defined as a hollow tube insertion hole, the hollow tube insertion hole has a cup shape with one side closed and the other side opened, an {opened side} of a {hole of the sound insulation element} is defined as an earphone mounting section, a {closed side} of the {hole of the sound insulation element} is defined as a sound insulation section, a {side along an axis} of the {hole of the sound insulation element} is defined as a sound insulation side, an {empty tube having both} of a {function of being mounting on radiating holes of sound of the earphone} and a {function of combining the earphone and the sound insulation element by being inserted in the hole of the sound insulation element} is defined as a hollow tube; the hollow tube has; a {function as an aggregate of a {deformable soft sound insulation element}}; a {function of compressing {the sound insulation side and the sound insulation section} of the {sound insulation element filling a gap} between {the wall of the external ear} and the {hollow tube}; a {{function of attenuating the entrance noise B} by compressing a portion contacting the sound insulation side of the sound insulation element, i.e., the {wall of the external ear near the entrance of the external auditory canal}}; and a function of attenuating {the entrance noise A, the entrance noise B, and the entrance regeneration sound} altogether by compressing the sound insulation section of the sound insulation element, i.e., {the vicinity of a space at the entrance of the external ear}, a combination of the sound insulation element and the hollow tube is defined as a composite sound insulation element, an {{attenuation characteristic} or {dependency of the attenuation characteristic on frequency}} of a {{transmission characteristic of the entrance regeneration sound} of the {sound insulation element or composite sound insulation element}} is defined as an entrance regeneration sound attenuation characteristic, a function of compensating the entrance regeneration sound attenuation characteristic is defined as a high sound range attenuation compensation function, an earphone having a {regeneration characteristic of the high sound range attenuation compensation function} is defined as a high sound range attenuation compensation type earphone, an {electronic circuit or electrical circuit} having a characteristic of the high sound range attenuation compensation function is defined as a high sound range attenuation compensation circuit, an earphone {mounted with the composite sound insulation element} is defined as a first characteristic, an {earphone having the high sound range attenuation compensation circuit at any place} between the {voice coil of the earphone} and the {earphone plug} is defined as a second characteristic, and a high sound range attenuation compensation type earphone {mounted with the composite sound insulation element} is defined as a third characteristic, wherein the earphone is the {earphone having the first and second characteristics} or the {earphone having the third characteristic}, - View Dependent Claims (2, 3, 4, 5)
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6. A {relay cord or a relay plug jack} comprising one terminal having an earphone plug and the other terminal having an earphone jack,
wherein insertion of a CR type high sound range attenuation compensation circuit between the earphone plug and the earphone jack is defined as an eighth characteristic.
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7. An earphone comprising:
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an earphone body which includes a voice coil and outputs a regeneration sound through radiating holes; a sound insulation element which is made of deformable sound insulating porous plastic, covers the radiating holes of the earphone body, and fills a space formed between the earphone body and an entrance of an external auditory canal; and a hollow tube which is mounted on the radiating holes of the earphone body and forms an aggregate such that the sound insulation element is combined to the earphone body. - View Dependent Claims (8, 9)
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Specification