CN204069245U - For the micro microphone fixture that ears acoustic pressure is picked up - Google Patents
For the micro microphone fixture that ears acoustic pressure is picked up Download PDFInfo
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- CN204069245U CN204069245U CN201420493841.6U CN201420493841U CN204069245U CN 204069245 U CN204069245 U CN 204069245U CN 201420493841 U CN201420493841 U CN 201420493841U CN 204069245 U CN204069245 U CN 204069245U
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- microphone
- fixture body
- micro microphone
- acoustic pressure
- duct
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Abstract
The utility model discloses the micro microphone fixture picked up for ears acoustic pressure, comprise fixture body, the contour mimicry of described fixture body is from duct mouth to one section of channel shape of duct second bend; The microphone via hole mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body; Described fixture body edges, be provided with to draw the holding wire of micro microphone to the trough outside earhole, the utility model can make to pick up the micro microphone of ears acoustic pressure can safety and be firmly placed on duct mouth, sealing effect is better, improves the measurement reproducibility of ears acoustic pressure data.
Description
Technical field
The utility model relates to the field of measuring technique of audible sound, particularly relates to the micro microphone fixture picked up for ears acoustic pressure.
Background technology
It is a widely used technology that ears acoustic pressure is picked up, refer to the ears place placement microphone true man or dummy head, record the sound pressure signal at ears place, can be used for the research of indoor auralization, sound programme makes, the fields such as head-position difficult labor (HRTF) measurement.According to the difference of microphone modes of emplacement, the ear canal method of measurement picking up duct voice pressure can be divided into, and pick up the clinical measurement method of acoustic pressure near membranae tympani aures unitae, and the method by miniature acceleration sensor indirect inspection ears acoustic pressure in the middle part of duct proposed recently.
Comparatively speaking, ear canal method is safer, can use under general experimental situation and operate, not need the assistance of clinical technique personnel; But because the placement of microphone is more difficult, particularly the repeatability of microphone position is bad, thus affect the repeatability that ears acoustic pressure picks up.
Ear canal method more common in the measurement of HRTF database [Xie B. S., Zhong X. L.,
et al, 2007].But because the sound source of HRTF Database Requirements to different directions and different distance is measured, its measuring period is general longer.When micro microphone is placed built on the sand at duct mouth, easily loosen in long measuring process and even depart from, thus the acoustic pressure of duct mouth is picked up receive impact.
Specifically, when ear canal method places micro microphone, following problem is faced:
(1) placement of micro microphone is different from earphone, and the radiating surface of earphone is inside duct, and wire moves towards outside duct naturally, thus easily places; Micro microphone is then different, needs by the vibrating diaphragm of micro microphone outside duct mouth, thus causes holding wire needs to be drawn after lateral buckling in duct.The holding wire of bending easily causes micro microphone to loosen, thus causes above-mentioned measurement reproducibility problem.
(2) when measuring ears acoustic pressure (or measuring HRTF) of true man experimenter's duct mouth, the duct mouth-shaped of each experimenter is not identical with size, if adopt general method, when such as wrapping up the wire of micro microphone and bending thereof with rubber ring or adhesive plaster, the duct of different experimenter can not be adapted to; If repeatedly repaired simple fixed form in measuring process, such as change rubber ring or adhesive plaster, easily damage micro microphone, and measurement data poor stability.
(3) micro microphone is various in style, when selecting different micro microphones, if micro microphone mates preferably with the microphone via hole of fixture, better ear canal effect can be reached, reduce the impact that low frequency leakage etc. is picked up ear canal method ears acoustic pressure.
Utility model content
The purpose of this utility model is, overcome the problem of the above-mentioned fixing micro microphone faced when duct mouth picks up ears acoustic pressure, a kind of ear canal shapes simulated is provided, and there is the micro microphone fixture of personalized resemblance, thus improve stability and precision that ears acoustic pressure picks up data.
To achieve the above object, the utility model adopts following technical scheme:
For the micro microphone fixture that ears acoustic pressure is picked up, comprise fixture body, the contour mimicry of described fixture body is from duct mouth to one section of channel shape of duct second bend; The microphone via hole mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body; Described fixture body edges, is provided with to draw the holding wire of micro microphone to the trough outside earhole.
Further, described fixture body stretches into one end semicircular in shape in duct.
Further, one end that described fixture body is positioned at duct mouth is provided with draught line.
For the manufacture method of the micro microphone fixture that ears acoustic pressure is picked up, comprise step:
1) make ear sample: along duct mouth toward eardrum direction, until account for duct second bend of 2/3 of ear canal length, make ear sample with flexible material;
2) cut ear sample: will the ear sample perpendicular cuts at duct mouth place be positioned at, will the ear sample perpendicular cuts at 2-3mm place outside distance duct second bend be positioned at;
3) polishing ear sample: the ear sample edge after cutting is polished smooth;
4) wax: use red wax to be about the thick wax of 0.5mm for ear sample last layer, ear sample surface is polished;
5) reverse mould: medical agar is heated to about 40 DEG C and makes ear mould to dissolving rear reverse mould;
6) shaping: use hypo-allergenic photo-curing material and ear mould to make fixture body, the one end being positioned at duct mouth at fixture body arranges draught line, so that the dismounting of ear sample;
7) polishing fixture body: the coarse part of fixture body or cutting corner are polished smooth;
8) polishing: the part of polishing is carried out polishing with buff and buffing wax, makes fixture body become glossy clear;
9) punch: the processing microphone via hole in the middle of fixture body according to micro microphone profile and size;
10) trough 4 is made: according to micro microphone signal linear dimension at fixture body edges processing trough.
relative to prior art, advantage of the present utility model and beneficial effect are:
1, compared with the micro microphone fixture picked up with general ear canal method ears acoustic pressure, owing to simulating the resemblance of personalized ear canal shapes, make the fixture of micro microphone more stable.
2, compared with the micro microphone fixture picked up with general ear canal method ears acoustic pressure, owing to being according to material object customization according to microphone via hole and holding wire trough, thus better ear canal effect can be obtained.
Accompanying drawing explanation
Fig. 1 is the schematic front view of the utility model embodiment.
Fig. 2 is the cross-sectional schematic of the utility model embodiment.
The implementation result schematic diagram of Fig. 3 the utility model embodiment.
In figure: 1-fixture body 1; 2-draught line; 3-microphone via hole; 4-trough; 5-eardrum; 6-duct mouth; 7-duct second bend.
Embodiment
Be described in further detail utility model object of the present utility model below in conjunction with the drawings and specific embodiments, embodiment can not repeat one by one at this, but therefore execution mode of the present utility model is not defined in following examples.
Embodiment 1
As shown in Figures 1 and 2, for the micro microphone fixture that ears acoustic pressure is picked up, comprise fixture body 1, trough 4, the contour mimicry of described fixture body 1 is from one section of channel shape of duct mouth 6 to duct second bend 7; The microphone via hole 3 mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body 1; Described fixture body 1 edge, is provided with to draw the holding wire of micro microphone to the trough 4 outside earhole.
Described fixture body 1 stretches into one end semicircular in shape in duct, is convenient to insert duct.
As shown in Figure 3, during use, the present embodiment is inserted in duct, the contour mimicry of fixture body 1 shape of duct, and the holding wire of micro microphone is arranged in trough 4, makes the fixture of micro microphone more stable, better ear canal effect can be obtained, meanwhile, one end that described fixture body 1 is positioned at duct mouth is provided with draught line 2, is convenient to micro microphone fixture from duct from extracting.
Embodiment 2:
For the manufacture method of the micro microphone fixture that ears acoustic pressure is picked up, comprise step:
1) ear sample is made: along duct mouth 6 toward eardrum 5 direction, until account for ear canal length d
12/3 duct second bend 7, make ear sample (see figure 3) with flexible material;
2) cut ear sample: will be positioned at the ear sample perpendicular cuts at duct mouth 6 place, will be positioned at the ear sample perpendicular cuts at 2-3mm place outside distance duct second bend 7, as shown in Figure 3, ear sample length is d
2;
3) polishing ear sample: the ear sample edge after cutting is polished smooth;
4) wax: use red wax to be about the thick wax of 0.5mm for ear sample last layer, ear sample surface is polished;
5) reverse mould: medical agar is heated to about 40 DEG C and makes ear mould to dissolving rear reverse mould;
6) shaping: use hypo-allergenic photo-curing material and ear mould to make fixture body 1, the one end being positioned at duct mouth at fixture body 1 arranges draught line 2, so that the dismounting of ear sample;
7) polishing fixture body 1: the coarse part of fixture body 1 or cutting corner are polished smooth;
8) polishing: the part of polishing is carried out polishing with buff and buffing wax, makes fixture body 1 become glossy clear;
9) punch: processing microphone via hole (3) in the middle of fixture body 1 according to micro microphone profile and size;
10) trough 4 is made: according to micro microphone signal linear dimension at fixture body 1 edge processing trough 4.
From above-mentioned example, according to the micro microphone arrangement that ear canal method ears acoustic pressure of the present utility model is picked up, the distance adjustment that Head-Related Transfer Function for Nearby Sources is measured can be met, coordinate system precision is high, the origin of coordinates is clear and definite, reach the object of expection, solve an auditory localization difficult problem near field head associated transport measuring system.This utility model is also applicable to other electroacoustic application scenario will be strict with sound source locus.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., within the protection range that all should be included in the utility model claim.
Claims (3)
1. for the micro microphone fixture that ears acoustic pressure is picked up, it is characterized in that, comprise fixture body (1), the contour mimicry of described fixture body (1) from duct mouth (6) to duct second bend (7) near one section of channel shape; The microphone via hole (3) mated with micro microphone is provided with, for installing and fixing micro microphone in the middle of described fixture body (1); Described fixture body (1) edge, is provided with to draw the holding wire of micro microphone to the trough (4) outside earhole.
2. the micro microphone fixture picked up for ears acoustic pressure according to claim 1, is characterized in that, described fixture body (1) stretches into one end semicircular in shape in duct.
3. the micro microphone fixture picked up for ears acoustic pressure according to claim 2, is characterized in that, one end that described fixture body (1) is positioned at duct mouth is provided with draught line (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493841.6U CN204069245U (en) | 2014-08-29 | 2014-08-29 | For the micro microphone fixture that ears acoustic pressure is picked up |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420493841.6U CN204069245U (en) | 2014-08-29 | 2014-08-29 | For the micro microphone fixture that ears acoustic pressure is picked up |
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| Publication Number | Publication Date |
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| CN204069245U true CN204069245U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420493841.6U Expired - Fee Related CN204069245U (en) | 2014-08-29 | 2014-08-29 | For the micro microphone fixture that ears acoustic pressure is picked up |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378703A (en) * | 2014-08-29 | 2015-02-25 | 华南理工大学 | Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof |
-
2014
- 2014-08-29 CN CN201420493841.6U patent/CN204069245U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378703A (en) * | 2014-08-29 | 2015-02-25 | 华南理工大学 | Fixing device for miniature microphone used for picking up double-ear sound pressure and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20190829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |