CN104720822A - Ear probe and impedance audiometer - Google Patents
Ear probe and impedance audiometer Download PDFInfo
- Publication number
- CN104720822A CN104720822A CN201410768809.9A CN201410768809A CN104720822A CN 104720822 A CN104720822 A CN 104720822A CN 201410768809 A CN201410768809 A CN 201410768809A CN 104720822 A CN104720822 A CN 104720822A
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- Prior art keywords
- probe
- sound
- ear
- ear probe
- acoustic
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- 239000000523 sample Substances 0.000 title claims abstract description 87
- 230000000638 stimulation Effects 0.000 claims abstract description 26
- 210000003094 ear ossicle Anatomy 0.000 claims abstract description 16
- 210000003205 muscle Anatomy 0.000 claims abstract description 16
- 230000011514 reflex Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 210000003128 head Anatomy 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000007689 inspection Methods 0.000 abstract description 4
- 239000000470 constituent Substances 0.000 description 3
- 210000000959 ear middle Anatomy 0.000 description 3
- 230000004936 stimulating effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/12—Audiometering
- A61B5/121—Audiometering evaluating hearing capacity
- A61B5/125—Audiometering evaluating hearing capacity objective methods
- A61B5/126—Audiometering evaluating hearing capacity objective methods measuring compliance or mechanical impedance of the tympanic membrane
Abstract
The present invention provides an ear probe capable of improving detection precision of probe sound input to a microphone, and an impedance audiometer including the ear probe. The ear probe (1) is used for the impedance audiometer used in auditory ossicle muscle reflex inspection, and the ear probe (1) comprises: an opening (8), a microphone (5), a transmission path (14) from the opening (8) to the microphone (5), and an acoustical filter (15) disposed on the transmission path (14) and used for reducing sound pressure of a stimulation sound component before the stimulation sound component arriving the microphone. The acoustical filter (15) comprises a sound volume (7) connected with a pipe (13) and an acoustic impedance pipe (6). The cut-off frequency of the acoustical filter (15) is a value more than 226Hz and less than 500Hz.
Description
Technical field
The ear that the present invention relates to for muscles of auditory ossicles reflex is popped one's head in and possesses the impedance audiometer of this ear probe.
Background technology
Impedance audiometer is used in muscles of auditory ossicles reflex (reflex (レ Off レ ッ Network ス examines Check)).Impedance audiometer main body possesses ear probe, and this ear probe is used for sounding to the external auditory meatus of person under inspection and receiving the sound in external auditory meatus.By using described ear to pop one's head in, providing interrupted tone (stimulation sound) providing to airtight external auditory meatus under the state of the continuant of 226Hz, 85dBSPL (probe sound), carrying out muscles of auditory ossicles reflex thus.
For each frequency of 500Hz, 1000Hz, 2000Hz and 4000Hz, by the sound pressure level from 80dBSPL to 110dBSPL, provide stimulation sound according to 5dB stage or 10dB stage.
Muscles of auditory ossicles owing to shrinking with stimulating sound reflexive, and therefore muscles of auditory ossicles shows the reaction that the acoustic impedance of tympanum is increased.By measuring the sound pressure variations of probe sound in external auditory meatus caused for above-mentioned reasons with mike, carry out muscles of auditory ossicles reflex.No. 2001-149345, Japanese Laid-Open Patent Publication and No. 2001-149346, JP, disclose muscles of auditory ossicles reflection accessory set.
In muscles of auditory ossicles reflex, when under the indeclinable condition of acoustic impedance, the probe sound of 226Hz and the stimulation sound of 500Hz is exported to specified volume from two earphones being positioned at ear probe, when then using the mike being positioned at ear probe to detect the sound of described specified volume, even if export the stimulation sound composition of 500Hz, the probe sound composition detected also should not by the impact of described stimulation sound composition., sometimes, if export the stimulation sound composition of 500Hz, then the situation that the acoustic pressure confirming the probe sound composition detected reduces.
Summary of the invention
The present invention is in view of using the probe sound composition of the mike detection being positioned at ear probe to be upset the problem of sound composition influence and the invention made.This problem did not find in technology in the past.The object of this invention is to provide a kind of ear that can improve the accuracy of detection of the probe sound composition of input mike pop one's head in and possess the impedance audiometer of this ear probe.
For the ear probe of the first method of the present invention that solves the problem, its impedance audiometer for using in muscles of auditory ossicles reflex, described ear probe comprises: opening, mike and from described opening to the transmission path of described mike; And acoustic filter, configuration on the transmit path, for stimulate sound composition arrive described mike before reduce the acoustic pressure of described stimulation sound composition.
Described acoustic filter comprises acoustic resistance pipe and sound equipment volume, and described sound equipment volume is connected with pipe.
Preferably, the cut-off frequency of described acoustic filter is the value being greater than 226Hz and being less than 500Hz.
The invention of fourth way is impedance audiometer, and it possesses the ear probe in the ear probe of the ear probe ~ Third Way of first method described in any one.
According to the first embodiment of the present invention, by acoustic filter, the stimulation sound composition of input mike can be reduced.In addition, by being connected in series acoustic resistance pipe and sound equipment volume, small-sized acoustic filter can be formed simply.
Being greater than 226Hz and the value being less than 500Hz by being set as yes by the cut-off frequency of acoustic filter, substantially can eliminating the impact stimulating sound composition (500Hz) to cause probe sound composition (226Hz).Therefore, the accuracy of detection of probe sound composition is improved.
In addition, according to the 4th embodiment of the present invention, by adopting the ear of any one embodiment in the ear probe of the ear of first embodiment of the invention probe the ~ the three embodiment to pop one's head in, improve the accuracy of detection of probe sound composition.Therefore, it is possible to carry out muscles of auditory ossicles reflex accurately.
Accompanying drawing explanation
Fig. 1 is the structure chart of ear of the present invention probe.
(a) of Fig. 2 and (b) of Fig. 2 is the outward appearance key diagram of ear probe.Wherein, (a) of Fig. 2 is side view.(b) of Fig. 2 is rearview.
Fig. 3 is the structured flowchart of impedance audiometer of the present invention.
Description of reference numerals
1 ... ear is popped one's head in, 1a ... front end, 2 ... housing, 3 ... probe sound earphone, 4 ... stimulate sound earphone, 5 ... mike, 5a ... enter sound mouth, 6 ... acoustic resistance is managed, 7 ... sound equipment volume, 8a, 8b, 8c, 8d ... opening, 9,10,13 ... pipe, 11 ... pressure system pipe arrangement, 14 ... transmission path, 15 ... acoustic filter, 20 ... impedance audiometer, 21 ... apparatus main body, 26 ... pressure adjustment unit, 27 ... impedance measuring portion, 28 ... control part, 29 ... operation display part.
Detailed description of the invention
Usually, in order to make the part of the insertion external auditory meatus in ear probe 1 easily insert external auditory meatus, this part is formed as the shape in stretching out in long way.Therefore, from the acoustic constituents in external auditory meatus, through the pipe 13 of the insertion portion inside of stretching out in long way, detected by the mike 5 being positioned at ear probe.The stimulation sound composition exported from external auditory meatus is fully decaying to the degree not affecting probe sound composition detection during pipe 13.
, if make ear probe 1 miniaturization, then there is following situation: the probe sound composition detected with mike 5 is less than the original size (85dBSPL) of probe sound composition corresponding to stimulating sound composition to become.The result of investigation, confirms this phenomenon and produces when using the stimulation sound of 500Hz.In addition, the acoustic constituents also simultaneously producing 274Hz is now confirmed.
Infer that described phenomenon is because the mechanism of following explanation produces.That is, if make ear probe 1 miniaturization, then the pipe 13 that the sound in external auditory meatus transmits to mike 5 is shortened.Therefore, the stimulation sound composition with this lower frequency of 500Hz just arrived mike 5 before fully decaying.Now, due to the interaction of the probe sound composition of this stimulation sound composition and 226Hz, produce the acoustic constituents of 274Hz.In addition, unnecessary acoustic energy is correspondingly consumed.
Referring to accompanying drawing, the embodiments of the present invention for eliminating described phenomenon are described.As depicted in figs. 1 and 2, the ear probe 1 of impedance audiometer of the present invention at least possesses housing 2 and is accommodated in probe sound earphone 3, stimulation sound earphone 4, mike 5, acoustic resistance pipe 6 and the sound equipment volume 7 in housing 2.
The overall dimensions of ear probe 1 is such as: length L=is about 80mm, height H=about 65mm, width W=about 20mm.Like this, the size of inspection degree can easily be carried out when ear probe 1 becomes this ear probe 1 hand-held.
The front end 1a inserting the ear probe 1 of external auditory meatus is provided with four openings 8a, 8b, 8c, 8d.In addition, by the front end 1a at ear probe 1, earplug (not shown) is installed, when ear probe 1 is inserted external auditory meatus, makes external auditory meatus airtight.
Opening 8a is communicated with probe sound earphone 3 through pipe 9.Opening 8b is communicated with stimulation sound earphone 4 through pipe 10.Opening 8c is connected with pressure system pipe arrangement 11.In addition, probe sound earphone 3, stimulation sound earphone 4 and mike 5, be electrically connected with apparatus main body.
Opening 8d is connected with sound equipment volume 7 through pipe 13.Sound equipment volume 7 is connected with acoustic resistance pipe 6.Acoustic resistance pipe 6 is connected with the sound mouth 5a that enters of mike 5.By pipe 13, sound equipment volume 7 and acoustic resistance pipe 6, form the transmission path 14 entering sound mouth 5a from opening 8d to mike 5.The internal diameter of pipe 13 is such as about
Acoustic resistance pipe 6 is enough thinner than pipe 13.Acoustic resistance with pipe 6 such as by internal diameter about
the pipe that length is about 13mm is formed.In addition, sound equipment volume 7 is such as made up of the cylindrical shell in the space forming more than 155 cubic millimeters.
The acoustic filter 15 as low pass filter is formed by described acoustic resistance pipe 6 and sound equipment volume 7.The cut-off frequency of acoustic filter 15 is the value being greater than 226Hz and being less than 500Hz.The acoustic resistance Resistance Value of pipe 6 and sound equipment volume 7 and shape, be not limited to the numerical value shown in embodiments of the present invention.These Resistance Values and shape suitably can determine according to specification.
As shown in Figure 3, impedance audiometer 20 of the present invention is made up of ear probe 1 and apparatus main body 21.Ear probe 1 uses the connecting portion 22 and connecting portion 23 that are arranged on apparatus main body 21, is connected with trachea 25 by cable 24 with apparatus main body 21.
Cable 24 by connecting portion 22 by the circuit of apparatus main body 21 with probe sound earphone 3, stimulate sound earphone 4 and mike 5 to be electrically connected.The pressure adjustment unit 26 of apparatus main body 21 is connected with the pressure system pipe arrangement 11 of ear with probe 1 by connecting portion 23 by trachea 25.
Apparatus main body 21 is made up of pressure adjustment unit 26, impedance measuring portion 27, control part 28 and operation display part 29.Pressure adjustment unit 26 possesses electromagnetic pump.Utilize described electromagnetic pump, in muscles of auditory ossicles reflex, air pressure in airtight external auditory meatus is adjusted to the air pressure that tympanum is the most easily vibrated, that is, the air pressure in airtight external auditory meatus is adjusted to and makes the compliance (コ Application プ ラ イ ア Application ス) of drum vibration of membrane become maximum air pressure.Tympanum Tympanometry (チ Application パ ノ メ ト リ ー examines Check) can be passed through in advance and measure the air pressure that described compliance becomes maximum.
Impedance measuring portion 27 is made up of enlarging section 30, signal processing part 31 and signal generating unit 32.Output signal from mike 5 is amplified by enlarging section 30.The signal processing that signal processing part 31 puts rules into practice to the output signal from enlarging section 30.Signal generating unit 32 generates the input signal inputted to probe sound earphone 3 and the input signal inputted to stimulation sound earphone 4.Signal processing part 31 also possesses the band filter of 226Hz.Utilize described band filter from the output signal from mike 5, detect the acoustic pressure of 226Hz composition, and export from signal processing part 31.
Control part 28 carries out the transmitting-receiving of signal with pressure adjustment unit 26, impedance measuring portion 27 and operation display part 29 respectively.By the transmitting-receiving of described signal, control part 28 controls the storage of setting and the action etc. of device entirety.Operation display part 29 has the liquid crystal display 33 of display check result and setting etc., inputs operating portion 34 and the built-in printer 35 of setting and instruction etc. for examiner.Built-in printer 35 printout check result.
The muscles of auditory ossicles reflex of the impedance audiometer of the present invention 20 using structure described above is described.First, at the ear front end 1a of probe 1, earplug is installed.Then, by the ear probe 1 having installed earplug is inserted external auditory meatus, external auditory meatus is airtight.If start to check, then adjusted the air pressure in external auditory meatus by pressure adjustment unit 26.
Then, the input signal inputted to probe sound earphone 3 is exported from signal generating unit 32.The described input signal exported, as probe tone signal input probe sound earphone 3.The probe tone signal of input exports from probe sound earphone 3 as probe sound (continuant of 226Hz, 85dBSPL) in external auditory meatus.
Then, export from signal generating unit 32 and stimulate tone signal, this stimulation tone signal has inspection frequency that preset, that have input to operating portion 34.For each frequency of 500Hz, 1000Hz, 2000Hz and 4000Hz, with the sound pressure level from 80dBSPL to 110dBSPL, provide stimulation sound according to 5dB stage or 10dB stage.The frequency of sound is stimulated to automatically switch.
Then, by acoustic filter 15, the acoustic pressure in external auditory meatus is detected by mike 5.Now, the cut-off frequency of the acoustic filter 15 be made up of acoustic resistance pipe 6 and sound equipment volume 7 can be set to such as 300Hz.Now, there is the stimulation sound composition of the above-mentioned each frequency comprising 500Hz, fully decay before being detected by mike 5 respectively.
So the stimulation sound composition detected with mike 5 is reduced to can not to the acoustic pressure of the degree that probe sound composition impacts.Therefore, due to the sound pressure variations of the probe sound composition of 226Hz can be detected accurately, so muscles of auditory ossicles reflex can be carried out exactly.
Adopt acoustic filter 15 of the present invention, can with cheap price structure Miniature Low Pass Filter.
In addition, the ear probe of embodiments of the present invention also can be the first following ear probe ~ third ear probe.
Above-mentioned first ear probe, for the impedance audiometer used in muscles of auditory ossicles reflex, the transmission path from external auditory meatus to mike forms acoustic filter, and reduces the acoustic pressure of the stimulation sound composition arriving mike.
Above-mentioned second ear probe is that acoustic filter configures on the transmit path in the mode connecting acoustic resistance pipe and sound equipment volume in above-mentioned first ear probe.
Above-mentioned third ear probe is that the cut-off frequency of acoustic filter is the value being greater than 226Hz and being less than 500Hz in above-mentioned first ear probe or the second ear probe.
In addition, the impedance audiometer of embodiments of the present invention possesses the probe of the ear described in any one in above-mentioned first ear probe ~ third ear probe.
Industrial applicibility
According to the present invention, before stimulation sound composition arrives mike, this stimulation sound composition (500Hz) can be reduced by acoustic filter.Therefore, it is possible to the ear probe providing the accuracy of detection of probe sound (226Hz) to be improved and the impedance audiometer possessing this ear probe.
Claims (4)
1. ear probe, its impedance audiometer for using in muscles of auditory ossicles reflex, the feature that described ear is popped one's head in is,
Described ear probe comprises:
Opening, mike and from described opening to the transmission path of described mike; And
Acoustic filter, configuration on the transmit path, for stimulate sound composition arrive described mike before reduce the acoustic pressure of described stimulation sound composition.
2. ear probe according to claim 1, is characterized in that, described acoustic filter comprises acoustic resistance pipe and sound equipment volume, and described sound equipment volume is connected with pipe.
3. ear probe according to claim 1 and 2, it is characterized in that, the cut-off frequency of described acoustic filter is the value being greater than 226Hz and being less than 500Hz.
4. an impedance audiometer, is characterized in that, possesses the ear probe in claims 1 to 3 described in any one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-263677 | 2013-12-20 | ||
| JP2013263677A JP5563144B1 (en) | 2013-12-20 | 2013-12-20 | Ear probe and impedance audiometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104720822A true CN104720822A (en) | 2015-06-24 |
| CN104720822B CN104720822B (en) | 2017-09-05 |
Family
ID=51417055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410768809.9A Active CN104720822B (en) | 2013-12-20 | 2014-12-12 | Ear is popped one's head in and impedance audiometer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5563144B1 (en) |
| CN (1) | CN104720822B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108209933A (en) * | 2016-12-14 | 2018-06-29 | 国际听力公司 | For the ear probe of hearing test |
| CN110974246A (en) * | 2019-12-05 | 2020-04-10 | 北京市医疗器械检验所 | Device for measuring time characteristics of otoacoustic impedance/admittance instrument |
| CN111227842A (en) * | 2019-12-05 | 2020-06-05 | 北京市医疗器械检验所 | Method for measuring time characteristics of otoacoustic impedance/admittance instrument |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079198A (en) * | 1975-07-24 | 1978-03-14 | Michael John Bennett | Electro-acoustic impedance bridges |
| CN85106589A (en) * | 1985-08-26 | 1987-04-29 | 中国科学院上海生理研究所 | Method of testing and device in the time of suitable figure of a kind of multi-frequency otoacoustic emission and phase shift figure |
| JPH02211125A (en) * | 1988-10-20 | 1990-08-22 | Hitoshi Wada | Auris media dynamic characteristics display method and auris media dynamic characteristics measurement device |
| JP2001149345A (en) * | 1999-12-01 | 2001-06-05 | Rion Co Ltd | Musculi ossiculorum auditus reflection measuring device |
-
2013
- 2013-12-20 JP JP2013263677A patent/JP5563144B1/en active Active
-
2014
- 2014-12-12 CN CN201410768809.9A patent/CN104720822B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4079198A (en) * | 1975-07-24 | 1978-03-14 | Michael John Bennett | Electro-acoustic impedance bridges |
| CN85106589A (en) * | 1985-08-26 | 1987-04-29 | 中国科学院上海生理研究所 | Method of testing and device in the time of suitable figure of a kind of multi-frequency otoacoustic emission and phase shift figure |
| JPH02211125A (en) * | 1988-10-20 | 1990-08-22 | Hitoshi Wada | Auris media dynamic characteristics display method and auris media dynamic characteristics measurement device |
| US5063946A (en) * | 1988-10-20 | 1991-11-12 | Nagashima Medical Instruments Co., Ltd. | Measuring method, measuring apparatus and indication method of the dynamical characteristics of middle ear |
| JP2001149345A (en) * | 1999-12-01 | 2001-06-05 | Rion Co Ltd | Musculi ossiculorum auditus reflection measuring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108209933A (en) * | 2016-12-14 | 2018-06-29 | 国际听力公司 | For the ear probe of hearing test |
| CN110974246A (en) * | 2019-12-05 | 2020-04-10 | 北京市医疗器械检验所 | Device for measuring time characteristics of otoacoustic impedance/admittance instrument |
| CN111227842A (en) * | 2019-12-05 | 2020-06-05 | 北京市医疗器械检验所 | Method for measuring time characteristics of otoacoustic impedance/admittance instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015119740A (en) | 2015-07-02 |
| CN104720822B (en) | 2017-09-05 |
| JP5563144B1 (en) | 2014-07-30 |
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