骨传导耳机介绍

We "use ears for listening" when talking to someone or listening to music. However, this seemingly natural perception is not accurate. Whales living in the ocean have ears inside their bodies where seawater and hydraulic pressures have no effect. Their ears are structured so as to block direct external sounds. In spite of that, whales hear sounds just like other animals. Ludwig van Beethoven became hard of hearing late in life, but the great composer listened to the piano in a way that allowed him to continue writing music.How do whales catch sounds? How did Beethoven listen to music? Whales use the lower jawbone to catch vibrations that travel through water and transmit them to their ears. Beethoven held a baton between his teeth and pressed it tightly against his piano. He listened by transmitting the piano sound vibrations from his teeth to his hearing organs by way of his skull.As these examples show, there are two transmission routes for sounds and voices: the air and bones. V ibrations that reach our ears through the air are known as air-transmitted sound. People normally refer to these vibrations when discussing hearing. V ibrations that reach our ears through bones are called bone-transmitted sound. Thus, sounds and voices reach our ears as vibrations through the air or through our bones and skin.As explained above, vibrations or what we conceive as sounds reach our ears (1) through the air or (2) through our bones and skin. The auditory nerve in our inner ear detects both types of vibratory motion as sound immediately upon arrival. We would like to explain how these vibrations or sounds travel to the auditory nerve as follows:Let us begin our explanation with air-transmitted sound. We normally "hear sounds with our own ears" when detecting vibrations in the air. Human speech, radio, and television sounds vibrate the surrounding air. The outer ear collects and guides these vibrations into our external auditory canal. V ibrations reach and shake the eardrum through the external auditory canal. Our middle ear amplifies this vibratory motion, which we perceive as sounds the moment it swings the tip of our auditory nerve floating in lymph that fills the cochlear canal in the inner ear.Bone-transmitted sound refers to "directly transmitted vibrations." These vibrations do not bypass either the outer ear or middle ear, and travel straight to the cochlear canal in the inner ear. Upon arriving in the cochlear canal, this vibratory motion shakes the auditory nerve floating in lymph. We can still hear our own voice when speaking with our ears covered. We can do this because our bones and skin transmit the vibrations of our speech. Our own voice sounds like someone else's when we utter words with ears covered. We sense this impression because closed ears shut out air-transmitted sound. We receive most vibrations from our bones and skin when covering our ears. Our own voice sounds strange when speaking with our ears covered because the voice we always hear and recognize as our own is a mixture of air-transmitted and bone-transmitted sound.Hearing through the bones and skin offers many advantages because it does not require you to lend your ear to air-transmitted sound. The greatest advantage is complete freedom in both ears. Y ou can catch sounds in your surroundings and have natural conversations without disconnecting your bone conduction speakers. Y ou can useearplugs in combination to protect your hearing against loud noise. Bone conduction speakers serve various occasions and demands. Y ou can use them in water and other special environments.Though we produce our voice by vibrating the vocal cords, other people catch our vibrations released in t he air with their ears. That's how others perceive our voice. The vibratory motion of the vocal cords travels to our own hearing organs through two transmission routes: the air and our skull.We can hear our own voice when covering our mouth or ears with our hands, then saying something. We can catch our voice in such experiments thanks to bone conduction. However, our own voice sounds different from our normal one when speaking with covered mouth or ears. We experience this change because we only catch bone-transmitted sound under such circumstances. The opposite also holds true. Our own voice sounds strange when taping it and playing it back because a tape recorder only catches air-transmitted sound.Our bones transmit voices. We can hear through our bones by using a highly sensitive vibration sensor to collect the vibrations of the vocal cords (that vibrate the bones) and converting these vibrations into electric audio signals.V oice transmitted through the bones is the same as converting vocal cord vibrations into audio signals upon reception by the skull. Y ou can catch cranial vibrations or voices in airless environments. Hearing aids incorporating the bone conduction mechanism offer users many advantages. These devices are easy to waterproof (for outdoor and underwater use), offer excellent tolerance to noise (thus less susceptible to external noise) and flexible to wear (by allowing you to position the microphone away from your mouth). Y ou can use hearing aids in many places and on many occasions.Bone conduction speakers offer a technical base for hearing voices and sounds through bones. These devices enable hearing-impaired people to catch sounds when there is no vibration in the air, and operate on the principle that we perceive sounds when vibrations reach our hearing organs directly. Based on this principle, we developed and patented a small, high-output bone conduction speaker that converts audio signals into vibrations. We realized unprecedented user convenience by integrating this speaker in a headset.Bone conduction microphones form another technical basis. The microphone cords use a highly sensitive vibration sensor to collect vibrations that reach the skull from the vocal cords and convert this vibratory motion into audio signals. Y ou can wear these devices all over your head to pick up vibrations, provided they are mounted on a relatively solid section of your head. We offer two types of bone conduction microphones: an "ear microphone" that picks up vibrations in the auditory canal, and a headset that captures vibrations on the head. We equipped both products with corrective circuits optimized for converting bon e-transmitted sound into clear voices. These products are compatible with various types of telecommunications equipment.We have developed communications tools that provide high added values in various fields by applying the bone conduction mechanism to a broad range of cutting-edge telecommunications technology. Our achievements include hands-free communications systems for various uses (listening-only and two-way models), a bone conduction hearing aid incorporating a bone conduction speaker (Kikuchan), and a helmet-type communications system (Shellshocker). Please visit the home page introducing our products for details.V oiceducer Ear Microphone EM-PBone conduction microphone + miniature speakerBlack: EM-P1N Beige:EM-P1NGray:EM-F2V oiceducer Radio Interface RB/RDV oiceducer Radio Interface BM6/BM7Selecting compatible interface for your radio is essential due to difference in sensitivity and sound quality of the bone conduction microphone from a conventional microphone. For EM -P series, two types are available: RB/RD and BM6 / BM7.1) C aptures bone conduction sound in the earV oiceducer ear microphone picks up bone conduction sound=vibration from the vocal chords in the external auditory canal and converts it into sounds. 2) B uilt in bone conduction microphone and miniature speakerThis seemingly an ordinary earphone is equipped with highly sensitive bone conduction microphone and miniature magnetic speaker. Such structure enables two way radio communications using only one ear and without cumbersome microphone placed in front of the mouth. 3) P rovide clear communication under various environmentBecause bone conduction microphone is hardly affected by the ambient noises, clear communication is realized despite the extreme noise . Also, since there is no apparatus near the mouth, combined use of the facial mask such as gas mask or helmet cause no problem and the bone conduction microphone serves as an ideal communication device. Its unique user friendly design is based on human engineering in consideration of safety, comfort and sanitary condition under long hour usage. 4) T hree available models to accommodate various needs and noise levelStandard type EM -P1A (Black) or EM -P1N (Beige) for normal environment,and EM -P2 (Gray) fornoise level beyond 95dB.Ear holder EHEar chip ETCord clip EC-501BV oiceducer Ear Microphone EM-PConnector plug compatible with each type of radio must be used. Please inquire which connector to obtain with the name of the manufacturer and the model. RB/RD is not waterproof; keep it away from splashing water orrain. In general, RB/RD operates on dry battery LR03(G), but it can be customized to run on electricity from theradio itself (does not apply to all types of radio)1)C onnects ear microphone to each type of radioRB/RD has built in filter amplifier function that correct and convert the sound signal picked up with ear microphone into audible sound, and circuit control function to switch on and off radio communications.2)E quipped with easy to operate PTT buttonPTT button is found in upper portion of the interface for easy operation. Pushing PTT button puts the radio in talk mode and releasing it will revert to receive and wait mode.3)T wo models are offered depending upon the needsRB is specially designed for ordinary PTT (press to talk). RD has a built in VOX (V oice activated circuitry) that automatically switch the radio to talk mode without clipping the initial syllables.4)B ody made of sturdy aluminum die cast:The body is made of aluminum die cast on the outside to withstand even the most severe handling.5)C lear communications and hands-free operation made possibleThe use of EM-P ear microphone together with RB/RD type interface provides crystal clear communication in extremely noisy environment where normal conversation is difficult. Also, the use of RD with built in VOX (V oice activated circuitry) allow hands free radio communications.6)C an be remote-controlled:Both RB and RD equipped with external PTT connector jack can be remote controlled by connecting the optional ring type remote control PTT switch CP-12 or body fit type remote PTT switch BP-200.Ring type remote control PTT switch CP-12Body fit type remote control PTT switch BP-200BM7(External Power)Connector plug compatible with each type of radio must be used. Please inquire which connector to purchasewith the name of the manufacturer and the model. For normal use, BM6 with built in battery (operates on singleLR03 (G) dry battery) is recommended. BM7 runs on electricity from the radio itself, but can be connected withonly a certain types of radio.V oiceducer Ear Microphone EM-P1)U se of PTT button with excellent manipulabilityAlmost entire frontal part of BM6/BM7 is PTT (push to talk) button itself. In addition to a large easy to manipulate button, its long switch stroke and unique structure to give solid sensation of switching(patented) provides good manipulability even through a thick gloves or from top of the fire proof suits. Its waterproof structure makes it an ideal communication apparatus for professional fire fighters and rescue corps.2)U se of Smart PTT ModeNormal PTT mode can be switched to Smart PTT (SPT) mode. In SPT mode, pushing PTT button once will lock the talk mode and another push will unlock and revert to receiving mode. SPT mode offers both the reliability of PTT button and hands free manipulability made possible with VOX (voice activated circuitry).3)A UTO SHUT OFFTo make certain that talk mode on SPT is unlocked at the end of transmission, AUTO SHUT OFF is installed to revert SPT to receive mode after about two minutes from the start of transmission. This is made possible by electric circuit devised (patented) to regulated SPT instead of maintaining the switch on mode mechanically.4)T otal water proof structureTotal water proof (IP67) is achieved by tightening the connector and battery case.This ring type remote control PTT can be worn on your finger or attached to a rod shaped material. Please select a model compatible with your interface.For RB/RD and SB/SDFor DM1 and V.A.D.E.RFor DM1As in BM6/BM7 and BM8, body fit remote control PTT switch is designed with a large manipulating button and long switch stroke structure(no Smart PTT function) which allow good manipulability even through thick gloves or from top of the protective clothing. Please select the model compatible with your interface.For RB/RD and SB/SDFor DM19,V.A.D.E.R.Prevents ear piece attached to EM-P, EM-L and EM7 from falling off and shut out unwanted noise caused by vibration from attaching cable.Universal type with allowance for size adjustment[EH-301]Black, Size S[EH-302]Black, Size M[EH-303]Black, Size L[EH-331]Clear, Size S[EH-332]Clear, Size M[EH-333]Clear, Size LEar chip is made of medical grade silicon.It is uniquely designed to provide perfect fit with soft touch and comes in sizes Mand L.Please select the one compatible with your ear microphone.[ET-202/10]Black,Size M(Package of 10)[ET-203/10]Black,Size L(Package of 10)[ET-212/10]Beige,Size M(Package of 10)[ET-213/10]Beige, Size L(Package of 10)[ET-301/10]Black,Size M(Package of 10)[ET-302/10]Black,Size L(Package of 10)Use cord clip to clip the cable attached to the ear microphone onto the collar for example to stabilize.This will help prevent a flatter and reduce unwanted noise creating vibrations.Voiceducer Ear Microphone EM-L Bone conduction microphone + miniature speakerBlack : EM-L1A Beige : EM-L1N Gray : EM-L2V oiceducer Radio Interface SB/SDCompatible interface for your radio is essential due to difference in sensitivity and sound quality of the boneconduction microphone from a conventional microphone. EM-L is specially designed to fit SB/SD radiointerface.1)C aptures bone conduction sound in the earV oiceducer ear microphone picks up bone conduction sound=vibration from the vocal chords in the external auditory canal and converts it into sounds.2)B uilt in bone conduction microphone and miniature speakerThis seemingly an ordinary earphone is equipped with highly sensitive bone conduction microphone and miniature magnetic speaker. Such structure enables two way radio communications using only one ear and without cumbersome microphone placed in front of the mouth.3)M eet special needs of various setting including highly noisy environmentBone conduction microphone having high tolerance against noise enables clear communication even in highly noisy environment. Also, it allows the combined use of breathing device as gas mask, or even a helmet since it need not cover the mouth area to communicate. Its unique design based on human engineering is in consideration of long hour usage with safety, comfort and sanitary condition4)T hree available models to accommodate various needs and noise levelStandard type EM-L1A (Black) or EM-L1N (Beige) for normal environment, and EM-L2 (Gray) for noise level beyond 95dB.Ear holder EHEar chip ETCord clip EC-501BV oiceducer Ear Microphone EM-LConnector plug compatible with each type of radio must be used. Please inquire which connector to obtain withthe name of the manufacturer and the model. Since SB/SD are not waterproof, avoid usage in pouring orlikewise. In general, SB/SD operates on dry batteryLR03(G), but can be customized to run on electricity fromthe radio itself (does not apply to all types of radio)1)C ompatible ear microphone connected to various types of radioSB/SD has built in filter amplifier function that correct and convert the sound signal picked up with ear microphone into audible sound, and circuit control function to switch on and off radio communications.2)E quipped with easy to operate PTT buttonPTT button is found in upper portion of the interface for easy operation. Pushing PTT button puts the radio in talk mode and releasing it will revert to receive and wait mode.3)T wo models are offered depending upon the needsSB is specially designed for ordinary PTT (push to talk). SD has built in VOX (V oice activated circuitry) to automatically switch the radio to talk mode without clipping the initial part of the message.4)B ody made of sturdy aluminum die castThe body is made of aluminum die cast on the outside to withstand even the most severe handling.5)E nergy saving circuitryWith the use of single dry battery LR03 (G), energy saving circuitry allows continued operation of 350 hours (SB)/250hours (SD).6)C lear communications and hands-free operation made possibleThe use of EM-P ear microphone together with RB/RD type interface provides crystal clear communication in extremely noisy environment where normal conversation is difficult. Also, the use of RD with built in VOX (V oice activated circuitry) allow hands free radio communication.7)C an be remote-controlledBoth SB and SD equipped with external PTT connector jack can be remote controlled by connecting the optional ring type remote control PTT switch CP-12 or body fit type remote PTT switch BP-200.Ring type remote PTT switch CP-12Body fit type remote PTT switch BP-200Voiceducer Ear Microphone EM-7 Bone conduction microphone + miniaturespeakerV oiceducer Radio Interface BM8V oiceducer Radio Interface DM19Voiceducer Radio Interface DM1Voiceducer Interface HP2 for MobileSelecting compatible interface for your radio is essential due to difference in sensitivity and sound quality of the bone conduction microphone from a conventional microphone. For EM7, interface shown in the above are compatible. Also, EM7 can be connected to professional radio communication system V .A.D.E.R. .1) C aptures bone conduction sound in the ear.V oiceducer ear microphone picks up bone conduction sound=vibration from the vocal chords in the external auditory canal and converts it into sounds. 2)B uilt in bone conduction microphone and miniature speakerThis seemingly an ordinary earphone is equipped with highly sensitive bone conduction microphone and miniature magnetic speaker. Such structure enables two way radio communications using only one ear and without cumbersome microphone placed in front of the mouth. 3) P rovide clear communication under various environmentBecause bone conduction microphone is hardly affected by the ambient noises, clear communication is realized despite the extreme noise. Also, since there is no apparatus near the mouth, combined use of the facial mask such as gas mask or helmet cause no problem and the bone conduction microphone serves as an idealcommunication device. Its unique user friendly design is based on human engineering in consideration of safety, comfort and sanitary condition under long hour usage.Ear holder EHEar chip ETCord clip EC-501BV oiceducer Ear Microphone EM7V oiceducer Ear Headset HG17V oiceducer Ear Headset HG18V oiceducer Ear Headset HG20/HG21V oiceducer Ear Headset FM1/FM2V oiceducer Ear Headset SK1/SK2Connector plug compatible with each type of radio must be used. Please inquire which connector to obtain byproviding the name of the manufacturer and the model.1)C ompatible with various types of headsetThis single interface can accommodate all of the above headset. Depending upon the needs, headset can be changed from one to the other. BM8 is a high cost performance device.2)U se of PTT button with excellent manipulabilityAlmost entire frontal part of BM6/BM7 is PTT (push to talk) button itself. In addition to a large easy to manipulate button, its long switch stroke and unique structure to give solid sensation of switching (patented) provides good manipulability even through a thick gloves or from top of the fire proof suits. Its waterproof structure makes it an ideal communication apparatus for professional fire fighters and rescue corps.3)U se of Smart PTT ModeNormal PTT mode can be switched to Smart PTT (SPT) mode. In SPT mode, pushing PTT button once will lock the talk mode and another push will unlock and revert to receiving mode. SPT mode offers reliability of PTT button and hands free manipulability made possible with VOX (voice activated circuitry) combined.4)A UTO SHUT OFFTo make certain that talk mode on SPT is unlocked at the end of transmission, AUTO SHUT OFF is installed to revert SPT to receive mode after about two minutes from the start of transmission. This is made possible by electric circuit devised (patented) to regulated SPT instead of maintaining the switch on mode mechanically.5)T otal water proof structureTotal water proof (IP67) is achieved by tightening the connector and battery case.V oiceducer Ear Microphone EM7V oiceducer Ear Headset HG17V oiceducer Ear Headset HG18V oiceducer Ear Headset HG20/HG21V oiceducer Ear Headset FM1/FM2V oiceducer Ear Headset SK1/SK2Connector plug compatible with each type of radio must be used. Please inquire which connector to purchase byproviding the name of the manufacturer and the model.1)B uild in VOX (voice activated circuitry) activated only by human voice (voiced sound)Special algorithm to detect only the human voice (component of voiced sound) from many other sounds captured by microphone was incorporated into DSP (Digital Signal Processor). DM19 offers high performance VOX activated by no other sound but voiced sound of human.2)E liminated a problem of clipping with V OXWith ordinary VOX, there is a slight lag from the time the microphone is switched on to the actual start of the radio transmission, resulting in the clipping of the first to second syllable. DM19 temporarily stores sound signal picked up by microphone in memory and sends it to transmitting circuit as the radio detects voiced sound. Such function made the transmission without clipping possible.3)N oise cancel functionEvolving from special algorithm to detect voiced sound only is a noise cancel system which digitally checks noise component against voiced component. This function is available to both PTT and VOX operation mode. Combined use with high performance bone conduction microphone will further enhance the noise cancel effect.4)D M19 is compatible with various types of headsetThis single interface can accommodate any headset shown in the above. Headset may be changed from one to the other, depending upon the needs. DM19 is a high performance product.5)T otal waterproofFortified polycarbonate resin is used on the outside to ensure total waterproof.Ring type remote control PTT switch CP14Body fit type remote control switch BP-210Removable battery packSwitch at the topV oiceducer Ear Microphone EM7V oiceducer Ear Headset HG17V oiceducer Ear Headset HG18V oiceducer Ear Headset HG20/HG21V oiceducer Ear Headset FM1/FM2V oiceducer Ear Headset SK1/SK2Connector plug compatible with each type of radio must be used.Please inquire which connector to obtain with the name of the manufacturer and the model.1) B uild in VOX (voice activated circuitry) activated only by human voice (voiced sound)Special algorithm to detect only the human voice (component of voiced sound) from many other sounds captured by microphone was incorporated into DSP (Digital Signal Processor). DM19 offers high performance VOX activated by no other sound but voiced sound of human.2) E liminated a problem of clipping with V OXWith ordinary VOX, there is a slight lag from the time the microphone is switched on to the actual start of the radio transmission, resulting in the clipping of the first to second syllable. DM19 temporarily stores sound signal picked up by microphone in memory and send it to transmitting circuit as the radio detects voiced sound. Such function made the transmission without clipping possible.3) N oise cancel functionEvolving from special algorithm to detect voiced sound only is a noise cancel system which digitally checks noise component against voiced component. This function is available to both PTT and VOX operation mode. Combined use with high performance bone conduction microphone will further enhance the noise cancel effect.4) D M1 is compatible with various types of headsetThis single interface can accommodate any headset shown in the above. Headset may be changed from one to the other, depending upon the needs. DM1 is a high performance product.Ring type remote control PTT switch CP-15HP1 : GrayHP2 : BlackHP2 : GrayV oiceducer Ear Microphone EM7V oiceducer Headset HG20/HG21Connector plug compatible withyour mobile/PHS isrequired. Please check the shape of the plug beforeinquiring.(Certain shape plug has no compatible connector plug available).1) H P1 connects Mobile/PHS with headset HG20/HG21Using HP1, the headset HG20/HG21 can be connected to your mobile/PHS. Attaching mobile/PHS to your belt allow hands free communications. It takes two LR03 (G) dry batteries to operate.2) H P2 connects mobile to Ear Microphone EM7Using HP2, Ear Microphone EM7 can be connected to your mobile. To prevent feedback (howling) in duplex, circuit (patent pending) designed to volume down when receiving and volume up while talking is devised. Two dry batteries LR03 (G) are used to operate.Voiceducer Headset HG17 Bone conduction microphone + bone conductionspeakerPlacing the headsetHelmet over the headsetV oiceducer Radio Interface BM8V oiceducer Radio Interface DM19V oiceducer Radio Interface DM1FULL DUPLEX Radio Interface DM3Selecting compatible interface for your communication equip ment is essential due to difference in sensitivity and sound quality of the bone conduction microphone from a conventional microphone. For HG17, interfaces shown in the above are available. Also, HG17 can be connected to professional radio communication system V .A.D.E.R..1) T emco's proprietary bone conduction technology is applied to both the microphone and the speakerBone conduction microphone incorporated into the headband picks up vibration from the vocal chords = bone conduction sound at the top of the skull and converts it to sounds. Radio communication is heard through bone conduction speaker placed near the temple. Thus crystal clear communication is achieved with both ears and front of the face free of any apparatus. 2) S ingle headset accommodates highly noisy to very peaceful environment.Bone conduction microphone hardly picks up ambient noises, and its combined use with ear plugs to protect hearing improves the clarity of the sound received via bone conduction speaker to a great extent. In the environment with no need for ear plugs, however, safety factor in work situation is increased by being able to listen to the surrounding sounds and communicate at the same time. 3) C an be used in combination with various types of face guard or mask.Since there is no microphone near the mouth, communications is made possible with various types of face guard and mask (anti dust, anti toxic, etc.,) over the face.。