CN1589064A - Contact type microphone - Google Patents
Contact type microphone Download PDFInfo
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- CN1589064A CN1589064A CN 200410051421 CN200410051421A CN1589064A CN 1589064 A CN1589064 A CN 1589064A CN 200410051421 CN200410051421 CN 200410051421 CN 200410051421 A CN200410051421 A CN 200410051421A CN 1589064 A CN1589064 A CN 1589064A
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- elastic damping
- damping part
- transducer
- bar shaped
- housing
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Abstract
A contact microphone includes a case a strip sensor longitudinally set along the case axis in the case with a fixed end and a sound process circuit characterizing that at least one elastic damping unit is set on the strip sensor, the end of the damping unit is contacted with or fixedly connected with the upper or lower inside wall of the case to expand the frequency sphere of its output signals.
Description
Technical field
The present invention relates to transmitter, relate in particular to the improvement of contact microphone.
Background technology
Contact microphone is also referred to as bone conduction formula microphone, its operation principle is: when the people speaks, when vocal cord vibration sends sound wave, also can cause the vibration of tissue, contact microphone adopts piezoelectric ceramic to pick up these vibrations as sound signal source as vibration pickup sensor, and vibration signal is transformed into the signal of telecommunication by transducer, export through behind the sound treatment circuit again.Chinese invention patent 01125615.X integratedly send at duct-type, disclose a kind of contact microphone in the receiver, and its version as shown in Figure 1.Contact microphone 10 comprises a housing 16, one bar shaped piezoceramic transducers 11, a sound treatment circuit 14.Housing 16 is made by on-deformable hard material, can effectively transmit the vibration of tissue; Bar shaped piezoceramic transducer 11 vertically is arranged in the housing along the housing axis, and the one end is fixed in the described housing, and the other end is a cantilever free end, forms cantilever beam structure; Free end place near transducer is provided with mass 15 (counterweight) in the two sides of transducer up-down vibration direction, is used for amplifying the vibration signal that picks up; Described sound treatment circuit 14 links to each other with the transducer stiff end, and the signal of telecommunication that transducer is imported carries out exporting after the impedance conversion.Owing to be the duct-type transmitter, in order directly to touch the position that sounding causes the tissue vibration, improve the sensitivity of picking up vibration, outside also connects a convex vibration pick-up block 12, and convex vibration pick-up block 12 directly touches duct, picks up vibration signal.Because vibration pickup sensor is insensitive to the sound wave in the ambient air medium, and it is more responsive to the vibration of the tissue that is in contact with it, therefore, contact microphone just has better anti-ambient noise ability, therefore be used widely, and, make contact microphones such as wear-type, duct-type according to its difference that contacts human body.
Yet, find that in practice process though the transmitter tonequality of said structure can satisfy the conversation requirement substantially, find that in some applications speech is clear inadequately, sound is than chaos.This mainly is because the signal frequency range that transmitter produces is wide inadequately, the high frequency band signal insufficient amplitude is big, low-frequency component is heavier again, in addition because the influence of whole transmitter system frequency, a spike (resonance point) can appear in the critical frequencies section, thereby speech quality is produced harmful effect, influence the call tone quality effect.
Summary of the invention
Technical problem to be solved by this invention is: overcome the defective of existing contact microphone, increase the transmitter frequency range, improve the tonequality of transmitter.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of contact microphone comprises a housing, and one along the bar shaped transducer that described housing axis vertically is arranged in the described housing and an end is fixing, and a sound treatment circuit that is used for impedance conversion; It is characterized in that: at least one elastic damping part is set on described bar shaped transducer.
Described transmitter, wherein: the end of described elastic damping part touches inwall and/or following inwall on the described housing.
Described transmitter, wherein: the end of described elastic damping part is fixedlyed connected with the last inwall and/or the following inwall of described housing.
Described transmitter, wherein: described elastic damping part is two ones up and down, is separately positioned on the two sides of described bar shaped transducer.
Described transmitter, wherein: described elastic damping part is a disk, described disk is sleeved on the described bar shaped transducer.
Described transmitter, wherein: described wafer radius is slightly larger than described inner walls radius, makes the described disk that is sleeved on the described bar shaped transducer present a radian.
Described transmitter, wherein: described disk is made by rubber or silica gel or Polyurethane or sponge.
Beneficial effect of the present invention is: after on the bar shaped transducer of contact microphone an elastic damping part being set, when the vibration signal that picks up when vibration pick-up block is little, because the active force of elastic damping part is very little, basically can not hinder the vibration of transducer, but the vibration signal that picks up when vibration pick-up block is very big, in the time of particularly on the resonance point of whole system, because it is big that the active force of elastic damping part becomes, the Oscillation Amplitude of transducer is restricted, promptly on different Frequency points to the inhibition degree varies sample of transducer Oscillation Amplitude.Therefore the effect that obtains is to promote high pitch, improves bass, suppresses resonance point, makes this transmitter output signal frequency scope be able to broadening, and speech intelligibility and intelligibility improve, and distortion reduces, and tonequality is improved significantly; Therefore, under identical extraneous vibration condition, the voice signal that this transmitter produces is better than prior art greatly.
Description of drawings
Fig. 1 is the structure cutaway view of the contact microphone of prior art.
Fig. 2 is a contact microphone structure cutaway view of the present invention.
Fig. 3 A is not for adding the transmitter practical frequency curve chart of damping piece
Fig. 3 B is for increasing disk elastic damping part transmitter practical frequency curve chart afterwards
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
Consult Fig. 2, contact microphone of the present invention comprises a housing 16, one bar shaped piezoceramic transducers 11, a sound treatment circuit 14.Housing 16 is a column type, is made by on-deformable hard material, can effectively transmit the vibration of tissue; Bar shaped piezoceramic transducer 11 vertically is arranged in the housing 16 along the housing axis, and the one end is fixed in the described housing by fixed cover 17, and the other end is a cantilever free end, forms cantilever beam structure; Be provided with mass 15 (counterweight) in the two sides of transducer up-down vibration direction, be used for amplifying the vibration signal that picks up, mass 15 can be fixed near bar shaped transducer 11 cantilever free end portions, also can move to transducer stiff end direction, be fixed on a certain suitable position of transducer position as shown in Figure 2; Described sound treatment circuit 14 links to each other with bar shaped transducer 11 stiff ends, is used for the signal of telecommunication of transducer input is carried out exporting after the impedance conversion.
Main points of the present invention are, on described bar shaped transducer, at least one elastic damping part 13 are set, and this elastic damping part 13 is arranged on the two sides of transducer 11 up-down vibration directions, and promptly the orientation with mass 15 settings is identical; The end of elastic damping part 13 will touch the last inwall of described housing 16 or down inwall or upper and lower inwall, and perhaps the last inwall of the end of elastic damping part 13 and housing 16 or time inwall or upper and lower inwall are fixedlyed connected.For example: to a certain suitable position between the cantilever end, can be separately at the upper side of transducer 11 an elastic damping part 13 be set at the stiff end of bar shaped transducer 11, its end touches or the last inwall of fixedly connected described housing 16; Also can be separately at the downside of transducer an elastic damping part be set, its end touches or the following inwall of fixedly connected described housing 16; Elastic damping part 13 can also be divided into two partly, be arranged on the upper and lower two sides of transducer 11 same positions or diverse location simultaneously, its end touches or the upper and lower inwall of fixedly connected described housing 16.Elastic damping part 13 can be multiple shapes such as sheet or bulk, and the simplest image also understandablely is exactly between the inwall little spring to be set respectively up and down at two sides up and down to the described housing of a certain position of described bar shaped transducer.After having increased elastic damping part 13, when the vibration signal that picks up when housing 16 is less, because the active force of elastic damping part 13 is very little, basically can not hinder the vibration of transducer, but the vibration signal that picks up when housing 16 is very big, in the time of particularly on the resonance point of whole system, because it is big that the active force of elastic damping part 13 becomes, the Oscillation Amplitude of bar shaped transducer 11 is subjected to bigger restriction, so make this transmitter output signal frequency scope be able to broadening, speech intelligibility improves, and distortion reduces, and tonequality is greatly improved.Need be in this explanation be, the elastic damping part 13 that on the bar shaped transducer that send the words assembly, is provided with, no matter whether the end of elastic damping part touches inner walls when transducer remains static, as long as the end of transducer described elastic damping part when dynamic (up-down vibration) touches inwall or following inwall or upper and lower inwall on the housing, can play and expand transmitter output signal frequency scope, improve the effect of tonequality; The end of elastic damping part touches on the described housing inwall and/or the condition of inwall down when satisfying transducer and remain static, or the last inwall of the end of elastic damping part 13 and housing 16 or when inwall or upper and lower inwall are fixedlyed connected down, its effect can be more obviously and is outstanding.
In actual applications, elastic damping part 13 is made the disk with centre bore, and the diameter of disk equals or is slightly larger than the diameter of inner walls, and the centre bore of disk passes the bar shaped transducer, disk is sleeved on a certain position of described bar shaped transducer, the outer end of disk touches the inwall to housing; Disk is made by elastomeric material, for example makes with rubber or silica gel or Polyurethane or sponge.The elastic damping part adopts such disk, helps processing and fabricating and is easy to produce assembling, also makes things convenient for simultaneously and adjusts its position on transducer, so that seek the position of best results.When the slightly larger in diameter of disk during in the inner walls diameter, after being sleeved on the transducer, disk can present a radian, its purpose is mainly for the consideration on the processing technology, even if like this because the error in the processing causes the skew of disk centre bore, the outer end of disk also can touch the inwall to housing, guarantees to improve the effect of tonequality.
Elastic damping part 13 can be arranged on the stiff end of bar shaped transducer to arbitrary position between the cantilever end, but the position that is provided with is not simultaneously, its expansion transmitter output signal frequency scope, and the effect of improving tonequality can be different.It is different and different that the shape and the mass 15 of housing 16 size shape, transducer 11 are also looked in the position of improving the tonequality optimum efficiency, for example: elastic damping part 13 is arranged on as shown in Figure 2 close transducer cantilever end position, or be arranged near near the position the mass 15, its effect of improving tonequality is better.
From the contrast of the transmitter frequency curve shown in Fig. 3 A, Fig. 3 B, can be clear that technique effect of the present invention.The common transmitter of using in the general communication, require the high-end 3400HZ that reaches of frequency range, just can satisfy the requirement of speech quality, the frequency curve of prior art transmitter shown in Fig. 3 A, the amplitude during its 3400HZ has dropped to about 1/3 of low side amplitude, so sound chaos, clear inadequately, and from curve, also have a resonance point at the 1600HZ place, it produces very big influence to speech quality, causes the distortion of sound; And by the increase shown in Fig. 3 B the elastic damping part--the frequency curve of sequin as seen, in the scope of 3800HZ, suppressed resonance point, high-end being improved, curve is comparatively smooth, this shows that technical scheme of the present invention has increased the bandwidth of transmitter, make call tone quality obtain very big improvement.
Utilize contact microphone of the present invention can make that the duct-type of high definition integratedly send, receiver, be used for duplex signaling etc.
Should be understood that; foregoing description is too concrete; but can not therefore be interpreted as restriction to scope of patent protection of the present invention; for those of ordinary skills; can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1, a kind of contact microphone comprises a housing, and one along the bar shaped transducer that described housing axis vertically is arranged in the described housing and an end is fixing, and a sound treatment circuit that is used for impedance conversion; It is characterized in that: at least one elastic damping part is set on described bar shaped transducer.
2, transmitter according to claim 1 is characterized in that: the end of described elastic damping part touches inwall and/or following inwall on the described housing.
3, transmitter according to claim 1 is characterized in that: the end of described elastic damping part is fixedlyed connected with the last inwall and/or the following inwall of described housing.
4, according to claim 2 or 3 described transmitters, it is characterized in that: described elastic damping part is two ones up and down, is separately positioned on the two sides of described bar shaped transducer.
5, transmitter according to claim 2 is characterized in that: described elastic damping part is a disk, and described disk is sleeved on the described bar shaped transducer.
6, transmitter according to claim 5 is characterized in that: described wafer radius is slightly larger than described inner walls radius, makes the described disk that is sleeved on the described bar shaped transducer present a radian.
7, transmitter according to claim 6 is characterized in that: described disk is made by rubber or silica gel or Polyurethane or sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051421 CN1589064A (en) | 2004-09-06 | 2004-09-06 | Contact type microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051421 CN1589064A (en) | 2004-09-06 | 2004-09-06 | Contact type microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1589064A true CN1589064A (en) | 2005-03-02 |
Family
ID=34602448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051421 Pending CN1589064A (en) | 2004-09-06 | 2004-09-06 | Contact type microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1589064A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045627B (en) * | 2009-10-09 | 2012-11-28 | 岳凡恩 | Radio device and electronic device using same |
| CN103096196A (en) * | 2011-11-03 | 2013-05-08 | 北京美尔斯通科技发展股份有限公司 | Bone conduction microphone |
| CN101945312B (en) * | 2009-07-09 | 2014-07-23 | 上海登堡信息科技发展有限公司 | Noise reduction pickup |
| WO2022262639A1 (en) * | 2021-06-18 | 2022-12-22 | 深圳市韶音科技有限公司 | Vibration sensor |
| WO2024020846A1 (en) * | 2022-07-27 | 2024-02-01 | 深圳市韶音科技有限公司 | Acoustic output device |
-
2004
- 2004-09-06 CN CN 200410051421 patent/CN1589064A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101945312B (en) * | 2009-07-09 | 2014-07-23 | 上海登堡信息科技发展有限公司 | Noise reduction pickup |
| CN102045627B (en) * | 2009-10-09 | 2012-11-28 | 岳凡恩 | Radio device and electronic device using same |
| CN103096196A (en) * | 2011-11-03 | 2013-05-08 | 北京美尔斯通科技发展股份有限公司 | Bone conduction microphone |
| WO2022262639A1 (en) * | 2021-06-18 | 2022-12-22 | 深圳市韶音科技有限公司 | Vibration sensor |
| WO2024020846A1 (en) * | 2022-07-27 | 2024-02-01 | 深圳市韶音科技有限公司 | Acoustic output device |
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Open date: 20050302 |