CN113466345B - In-ear type hearing protector sound insulation measuring system - Google Patents
In-ear type hearing protector sound insulation measuring system Download PDFInfo
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- CN113466345B CN113466345B CN202110622971.XA CN202110622971A CN113466345B CN 113466345 B CN113466345 B CN 113466345B CN 202110622971 A CN202110622971 A CN 202110622971A CN 113466345 B CN113466345 B CN 113466345B
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- 230000001012 protector Effects 0.000 title claims abstract description 71
- 238000009413 insulation Methods 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 210000000613 ear canal Anatomy 0.000 abstract description 10
- 238000002955 isolation Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000000741 silica gel Substances 0.000 description 9
- 229910002027 silica gel Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 206010011878 Deafness Diseases 0.000 description 2
- 231100000895 deafness Toxicity 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 208000016354 hearing loss disease Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 206010063602 Exposure to noise Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention relates to the field of hearing protector measuring equipment, in particular to an in-ear hearing protector sound insulation measuring system, which comprises a sound guide pipe, a sound insulation sleeve, a test microphone and a hanging bracket; one end of the sound guide pipe is inserted into the central through hole of the in-ear type hearing protector, and the other end of the sound guide pipe is in sealing fit connection with the opening end of the sound insulation sleeve; the sound insulation sleeve is arranged on the hanging bracket; the test microphone is mounted in the acoustic isolation sleeve to measure the sound pressure level in the ear canal after the in-ear hearing aid is plugged in the ear canal. The sound insulation measuring system of the in-ear type hearing protector, provided by the invention, has the advantages that the sound guide tube is internally adopted, not only can be used for guiding sound, but also can be used for installing and fixing the in-ear type hearing protector, so that the working requirement of the invention is effectively met, and meanwhile, the whole volume of the invention is reduced.
Description
Technical Field
The invention relates to the field of hearing protector measuring equipment, in particular to an in-ear hearing protector sound insulation measuring system.
Background
From a physiological point of view, all sounds that are annoying and not needed are called noise. When the noise energy reaches a certain level, the hearing of the person is damaged. The hearing aid is widely used in an industrial noise environment as an instrument for protecting the human ear from the exposure to noise. The sound attenuation capability is critical to the level of protection performance.
The protection effect of the current test hearing protector mainly comprises two types, namely, inviting volunteers, carrying the hearing protector, playing sound, taking subjective feeling measurement, and adopting an artificial head and trunk simulator to measure the protection effect of the hearing protector by using simulation ears. But cannot directly measure the size of the sound actually received after the hearing aid is worn on the ear.
Disclosure of Invention
The invention aims to provide an in-ear type hearing protector sound insulation measuring system which can effectively solve the problems in the prior art.
The aim of the invention is achieved by the following technical scheme:
an in-ear type hearing protector sound insulation measuring system comprises a sound guide pipe, a sound insulation sleeve, a test microphone and a hanging bracket; one end of the sound guide pipe is inserted into the central through hole of the in-ear type hearing protector, and the other end of the sound guide pipe is in sealing fit connection with the opening end of the sound insulation sleeve; the sound insulation sleeve is arranged on the hanging bracket; the test microphone is mounted in the acoustic isolation sleeve to measure the sound pressure level in the ear canal after the in-ear hearing aid is plugged in the ear canal.
Preferably, the sound guide tube is in threaded fit connection with the sound insulation sleeve.
Preferably, a sealing gasket is arranged at the joint of the sound guide tube and the sound insulation sleeve.
Preferably, an external thread structure is arranged on the pipe body at one end of the sound guide pipe, which is close to the sound insulation sleeve, and the external thread structure is connected with a limit ring in a threaded fit manner, and the limit ring is blocked at the outer side of the in-ear type hearing protector.
Preferably, the inner side of the limiting ring is provided with a sealing ring attached to the in-ear type hearing protector, and the inner diameter of the sealing ring is larger than the diameter of the central through hole of the in-ear type hearing protector.
Preferably, a rubber sealing sleeve is glued on the sound guide tube to relatively seal the sound guide tube and the central through hole of the in-ear hearing protector.
Preferably, the sound insulation measuring system of the in-ear type hearing protector further comprises an in-ear microphone; the ear-in microphone comprises a microphone body, a spherical receiving box and a first screw; one end of the spherical connecting box is provided with a mounting groove, and a microphone body is fixed in the mounting groove; the other end of the spherical joint box is fixedly connected with one end of a first screw rod, and the other end of the first screw rod is in threaded fit with the sound guide tube and is far away from the sound insulation sleeve.
Preferably, the diameter of the spherical fitting box is larger than the diameter of the sound tube, and the radius of the spherical fitting box is smaller than the diameter of the sound tube.
Preferably, the spherical surface of the spherical connecting box is made of elastic rubber, and part of the spherical surface of the spherical connecting box is blocked in the pipe orifice of the sound guide pipe.
Preferably, the sound insulation sleeve comprises a sleeve body, a sleeve cover and a short pipe; one end of the sleeve body is open, and the other end of the sleeve body is closed; one end of the cylinder cover is hermetically sleeved at the open end of the sleeve body, and the other end of the cylinder cover is fixedly connected and communicated with one end of the short pipe; the other end of the short pipe is in sealing connection and communication with the sound guide pipe; the sleeve body and the sleeve cover are fixedly connected with the hanging lug support.
Preferably, the sleeve body, the cylinder cover and the short tube are made of sound insulation materials, the sound insulation materials are preferably multi-layer sound insulation glass, and sound insulation cotton is wrapped on the outer walls of the sleeve body, the cylinder cover and the short tube.
Preferably, the hanger bracket comprises an ear hook, a cross bar component and a hanging component; one end of the ear hook is connected with one end of the cross rod assembly in a matching way, and the other end of the cross rod assembly is connected with the hanging assembly in a matching way; the hanging component is connected with the sleeve body and the cylinder cover in a matched mode.
Preferably, the ear hook is made of elastic plastic, and the memory cotton layer is wrapped outside the ear hook.
Preferably, the cross bar assembly comprises a fixed cross bar, a sliding cross bar, a second screw and a horizontal sliding block; one end of the sliding cross rod is connected with the ear hook in a matched manner, and the other end of the sliding cross rod is in sliding fit in a horizontal slideway of the fixed cross rod; the horizontal sliding block is in sliding fit in a limit slideway of the fixed cross rod and is fixedly connected with the sliding cross rod; the middle thread of the second screw rod is in transmission connection with the horizontal sliding block, and one end of the second screw rod is in running fit on the fixed cross rod.
Preferably, the hanging component comprises a sliding sleeve, a vertical shaft, a third screw rod, a lantern ring, a positioning bolt, an outer frame body, an inner frame body and a fourth screw rod; the sliding sleeve is fixed at one end of the fixed cross rod; the sliding sleeve is in sliding fit on the vertical shaft, a groove is formed in the vertical shaft, and the groove is in sliding fit with the guide convex rib in the sliding sleeve; the upper end of the third screw rod is rotationally connected to the top surface of the sliding sleeve, and the lower end of the third screw rod is in threaded fit with the inner threaded hole of the vertical shaft; the bottom end of the vertical shaft is in running fit on the outer frame body, the lantern ring is fixed on the outer frame body, the lantern ring is sleeved on the outer side of the vertical shaft, the lantern ring is in threaded fit with the positioning bolt, and the positioning bolt is propped against the vertical shaft; the sleeve body is fixed on the outer frame body, and the sleeve cover is fixed on the inner frame body; one end of the fourth screw rod is rotatably connected to the inner frame body, and the other end of the fourth screw rod is in threaded fit with the inner threaded hole of the outer frame body.
Preferably, the sound insulation measuring system of the in-ear hearing protector further comprises a plug rod assembly; one end of the ear hook is in rotary fit with one end of the cross rod assembly through a short shaft; the inserted link assembly comprises a sliding inserted link, a support, an unlocking tension spring and a pull block; the middle part of the sliding inserted link is in sliding fit with a support, and the support is fixed on the cross rod assembly; one end of the sliding inserted rod is inserted into a transverse insertion hole penetrating through the ear hook, and the other end of the sliding inserted rod is fixedly connected with a pull block; the pull block is fixedly connected with the support through an unlocking tension spring.
The invention has the beneficial effects that:
the sound insulation measuring system of the in-ear type hearing protector has the advantages that the sound guide tube adopted in the system can be used for guiding sound and installing and fixing the in-ear type hearing protector, so that the working requirement of the system is effectively met, and meanwhile, the whole volume of the system is reduced; the adjustable ear hanging bracket is adopted in the acoustic duct, so that the acoustic duct can meet wearing requirements of different users, the ear-in type hearing protector arranged on the acoustic duct is controlled to be inserted into the auditory duct more comfortably, and the insertion depth can be adjusted properly; the inside adopts the test microphone of placing in the sound insulating sleeve to measure and directly insert the in-ear microphone to the ear canal inside and measures, can effectively measure the actual sound pressure level that receives of people's ear, obtains in-ear hearing aid's actual protection value and individual sound attenuation value, and the user of being convenient for finds the in-ear hearing aid that is applicable to oneself to reduce professional harm such as deafness that causes because of the noise.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram illustrating an embodiment of the present invention;
FIG. 2 is a second overall schematic diagram according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an acoustic duct according to an embodiment of the present invention;
FIG. 5 is a schematic view of a sound insulating sleeve according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a hanger bracket according to an embodiment of the present invention;
fig. 7 is a schematic structural view of an ear hook according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a rail assembly according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a hoist assembly according to an embodiment of the present invention;
FIG. 10 is a schematic view of a structure of a plunger assembly according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an in-ear microphone according to an embodiment of the present invention.
Icon: an acoustic duct 1; a stop collar 101; a seal ring 102; a rubber boot seal 103; a sound insulation sleeve 2; a sleeve body 201; a cap 202; a short tube 203; a test microphone 3; a hanger bracket 4; an ear hook 401; a crossbar assembly 402; a fixed cross bar 402a; a sliding cross bar 402b; a second screw 402c; a horizontal slider 402d; a hoist assembly 403; sliding sleeve 403a; a vertical shaft 403b; a third screw 403c; collar 403d; a positioning bolt 403e; an outer frame 403f; an inner frame 403g; a fourth screw 403h; a plunger assembly 404; sliding plunger 404a; a support 404b; unlocking the tension spring 404c; a pull block 404d; an in-ear microphone 5; a microphone body 501; ball joint box 502; a first screw 503.
Detailed Description
In order to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of a plurality of "a number" is two or more, unless explicitly defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the invention, which is defined by the claims, but are not to be limited to the specific details disclosed herein. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the present application to which they may be applied, but rather to modify or adapt the relative relationship without materially altering the technical context.
The invention is described in further detail below with reference to fig. 1-11.
Example 1
As shown in fig. 1 to 11, an in-ear type hearing aid sound insulation measuring system comprises a sound guide tube 1, a sound insulation sleeve 2, a test microphone 3 and a hanging bracket 4; one end of the sound guide tube 1 is inserted into a central through hole of the in-ear type hearing aid, and the other end of the sound guide tube 1 is in sealing fit connection with the opening end of the sound insulation sleeve 2; the sound insulation sleeve 2 is arranged on the hanging bracket 4; the test microphone 3 is mounted in the sound-insulating sleeve 2 to measure the sound pressure level in the ear canal after the in-ear hearing aid is plugged in the ear canal.
The invention relates to an in-ear type hearing protector sound insulation measuring system, which is used for measuring an actual protection value and a personal sound attenuation value of an in-ear type hearing protector, wherein the in-ear type hearing protector is mainly an earplug, and when the in-ear type hearing protector is used for measuring, a sound box with a power amplifier can be adopted as a sound source for actively emitting various noises, a sound field is provided for the personal sound attenuation value, and the sound pressure level outside an auditory canal can be measured through another pre-prepared test microphone; then, an in-ear type hearing protector is arranged on the acoustic duct 1, a central through hole of the in-ear type hearing protector is controlled to keep a certain relative seal with the acoustic duct 1, then the ear hanging bracket 4 is worn on the ear of a tester, the in-ear type hearing protector on the acoustic duct 1 is controlled to be inserted into an auditory canal, and after the in-ear type hearing protector is plugged in the auditory canal, the sound pressure level transmitted by the acoustic duct 1 is measured through the test microphone 3 in the sound insulation sleeve 2; finally, the output signals of the two microphones can be subjected to spectrum analysis through the two-channel handheld spectrum analyzer, the actual protection value and the personal sound attenuation value of the hearing protector are calculated, and the test work of the in-ear hearing protector is completed; the test microphone 3 is preferably a 1/4 "test microphone, a mini-microphone.
The sound guide tube 1 is connected with the sound insulation sleeve 2 in a threaded fit manner, so that the sound guide tube is convenient to detach and install.
The joint of the sound guide tube 1 and the sound insulation sleeve 2 is provided with a sealing gasket.
The sound guide tube 1 with the sound insulation sleeve 2 is made of materials with good sound insulation effect, and the joint of the sound guide tube 1 and the sound insulation sleeve 2 is provided with a sealing gasket, so that the sound insulation and sound resistance effect is improved, and the accuracy of testing the microphone 3 inside the sound insulation sleeve 2 is guaranteed.
The sound guide tube 1 is close to be equipped with external screw thread structure on the one end body of acoustic enclosure 2, and the last screw thread fit of external screw thread structure connects spacing ring 101, and spacing ring 101 block is in the outside of in-ear type hearing aid.
The inside of the limiting ring 101 is provided with a sealing ring 102 attached to the in-ear type hearing protector, and the inner diameter of the sealing ring 102 is larger than the diameter of the central through hole of the in-ear type hearing protector.
The sound guide tube 1 is glued with a rubber sealing sleeve 103 so as to relatively seal the sound guide tube 1 and the central through hole of the in-ear hearing protector.
The limiting ring 101 is arranged to facilitate blocking and limiting the outer side of the in-ear type hearing protector, so as to prevent the in-ear type hearing protector from being separated from the sound guide tube 1 when the in-ear type hearing protector is inserted into the auditory canal; besides the blocking function, the contact position of the rotating limiting ring 101 with the external thread structure of the sound guide tube 1 is changed, so that earplugs with different lengths can be conveniently connected and fixed with the sound guide tube 1; the sealing ring 102 is tightly attached to the in-ear type hearing protector, plays a certain sealing effect, and is provided with the rubber sealing sleeve 103, so that the sealing performance of the center through hole of the in-ear type hearing protector and the sound guide tube 1 is improved, the sound insulation effect is improved, and the influence of the center through hole on the sound insulation effect of the in-ear type hearing protector, which is measured, is reduced.
The invention relates to a test case of an in-ear type hearing protector sound insulation measuring system, which comprises the following steps:
(1) Test object: silica gel earplug;
(2) The testing method comprises the following steps: during testing, firstly, punching holes of the silica gel earplug by professional equipment, and controlling the holes of the silica gel earplug to be perfectly attached to the sound guide tube 1; the sound guide tube 1 is penetrated into the central through hole of the silica gel earplug, the position of the limiting ring 101 is adjusted, the limiting ring 101 is controlled to be blocked on one side of the silica gel earplug, the sealing ring 102 is controlled to be blocked on one side of the silica gel earplug, and the blocking of the central through hole of the silica gel earplug is realized to a certain extent; the whole body of the invention is worn on the ears of a tester through the hanging bracket 4, and the silica gel earplug on the sound tube 1 is controlled to be inserted into the ears; then starting a sound source, emitting various noises, providing a sound field for the individual sound attenuation value, and measuring the sound pressure level outside the auditory canal through another test microphone prepared in advance; the sound pressure level inside the ear was measured by the test microphone 3 inside the present invention, and thus the sound insulation amount of the tested silica gel earplug was calculated.
Example two
As shown in fig. 1-11, the sound insulation measuring system of the in-ear type hearing aid further comprises an in-ear microphone 5; the ear-in microphone 5 includes a microphone body 501, a spherical attachment case 502, and a first screw 503; a mounting groove is formed at one end of the spherical receiving box 502, and a microphone body 501 is fixed in the mounting groove; the other end of the ball-shaped receiving box 502 is fixedly connected with one end of the first screw 503, and the other end of the first screw 503 is in threaded fit with the sound tube 1 at one end of the sound tube 2 away from the sound insulation sleeve. The ear microphone 5 is of a detachable structure, and is mainly used for measuring insertion loss, namely, before and after noise is processed, the measured sound pressure level or the difference of other sound quantities is measured at a certain reference point, namely, a reference point A is taken in an ear canal, the sound pressure level A before the ear protector is worn at the reference point and the sound pressure level A 'after the ear protector is worn are measured, and then IL=A-A' is obtained to obtain the insertion loss; when the insertion loss is measured, firstly, the ear protector earplug on the acoustic duct 1 is removed, then the ear microphone 5 is arranged on the acoustic duct 1 through the first screw rod 503, then the invention is worn on the ear of a tester, the microphone body 501 is controlled to be positioned in an ear canal, the microphone body 501 adopts an ultra-small-volume MEMS microphone, and the ultra-small-volume MEMS microphone is placed in the ear canal to test the sound pressure level A received by the ear of the tester; then, the ear protector earplug is arranged on the sound guide tube 1 and worn, and IL=A-A 'is measured when the sound pressure level A' of the ear protector worn is measured, so that the insertion loss is obtained; after the sound pressure level A 'of the in-ear type hearing protector is tested, the sound pressure level A' can be compared with the sound pressure level obtained by testing the test microphone 3, and a plurality of groups of test data are adopted to average the sound insulation quantity of the in-ear type hearing protector, so that a more accurate sound insulation quantity measurement result of the in-ear type hearing protector is obtained, the insertion loss, the actual protection value and the individual sound attenuation value of the in-ear type hearing protector are judged, and a user can find the in-ear type hearing protector suitable for the user, so that occupational hazards such as noise deafness and the like caused by noise are reduced.
The diameter of the spherical fitting box 502 is larger than the diameter of the sound tube 1, and the radius of the spherical fitting box 502 is smaller than the diameter of the sound tube 1.
The sphere of spherical joint box 502 is made for elastic rubber, and the partial sphere shutoff of spherical joint box 502 is in the mouth of pipe of sound duct 1, and the sphere shutoff of spherical joint box 502 can play better sound insulation and hinder the effect of sound in the mouth of pipe department of sound duct 1, guarantees the inside relative leakproofness of auditory canal, improves the accuracy of test.
The sound insulation sleeve 2 comprises a sleeve body 201, a sleeve cover 202 and a short pipe 203; one end of the sleeve body 201 is open and the other end is closed; one end of the cylinder cover 202 is hermetically sleeved at the open end of the sleeve body 201, and the other end of the cylinder cover 202 is fixedly connected and communicated with one end of the short tube 203; the other end of the short tube 203 is in sealing connection and communication with the acoustic duct 1; the sleeve body 201 and the sleeve cover 202 are fixedly connected with the hanging bracket 4.
The sleeve body 201, the sleeve cover 202 and the short tube 203 are made of sound insulation materials.
The arrangement of the sleeve body 201 and the cover 202 inside the sound insulation sleeve 2 facilitates the installation and removal of the test microphone 3 inside the sleeve body 201.
Example III
As shown in fig. 1-11, the hanger bracket 4 includes an ear hook 401, a crossbar assembly 402, and a hitch assembly 403; one end of the ear hook 401 is connected to one end of the cross bar assembly 402 in a matching way, and the other end of the cross bar assembly 402 is connected to the hanging assembly 403 in a matching way; the hanging assembly 403 is cooperatively connected with the sleeve body 201 and the cylinder cover 202. The ear hook 401 is made of plastic with certain elasticity, and the ear hook 401 is used for being hung on an ear to realize the wearing of the invention; the whole length of the cross bar assembly 402 can be properly adjusted, so that the depth of the in-ear type hearing protector arranged on the acoustic catheter 1 in the invention to the interior of the auditory canal can be conveniently controlled, and the requirements of different tests can be met; the hanging component 403 is used for fixing the sound insulation sleeve 2, and controlling the horizontal height of the sound guide tube 1 connected with the sound insulation sleeve 2, so as to control the height position of the in-ear type hearing protector on the sound guide tube 1, and meet different testing requirements.
The ear hook 401 is made of elastic plastic, and the memory cotton layer is wrapped outside the ear hook 401, so that the applicability and comfort of wearing the ear hook 401 are improved.
The rail assembly 402 includes a fixed rail 402a, a sliding rail 402b, a second screw 402c, and a horizontal slider 402d; one end of the sliding cross bar 402b is connected with the ear hook 401 in a matched manner, and the other end of the sliding cross bar 402b is in sliding fit in a horizontal slideway of the fixed cross bar 402a; the horizontal sliding block 402d is in sliding fit in a limit slideway of the fixed cross bar 402a and is fixedly connected with the sliding cross bar 402b; the middle thread of the second screw 402c is in transmission connection with the horizontal sliding block 402d, and one end of the second screw 402c is in running fit on the fixed cross bar 402 a. When the overall length of the cross bar assembly 402 needs to be adjusted, the second screw 402c is rotated to change the contact position with the horizontal slider 402d, so that the horizontal slider 402d drives the sliding cross bar 402b to slide in the horizontal slideway of the fixed cross bar 402a, and the overall length of the cross bar assembly 402 is adjusted.
The hoist assembly 403 includes a sliding sleeve 403a, a vertical shaft 403b, a third screw 403c, a collar 403d, a positioning bolt 403e, an outer frame 403f, an inner frame 403g, and a fourth screw 403h; the sliding sleeve 403a is fixed at one end of the fixed cross bar 402a; the sliding sleeve 403a is in sliding fit on the vertical shaft 403b, a groove is arranged on the vertical shaft 403b, and the groove is in sliding fit with the guiding convex edge in the sliding sleeve 403a; the upper end of the third screw 403c is rotatably connected to the top surface of the sliding sleeve 403a, and the lower end of the third screw 403c is in threaded fit in the internal threaded hole of the vertical shaft 403b; the bottom end of the vertical shaft 403b is in running fit on the outer frame body 403f, a collar 403d is fixed on the outer frame body 403f, the collar 403d is sleeved on the outer side of the vertical shaft 403b, a positioning bolt 403e is in threaded fit on the collar 403d, and the positioning bolt 403e is propped against the vertical shaft 403b; the sleeve body 201 is fixed on the outer frame body 403f, and the cylinder cover 202 is fixed on the inner frame body 403g; one end of the fourth screw 403h is rotatably connected to the inner frame 403g, and the other end of the fourth screw 403h is screwed into the internal threaded hole of the outer frame 403 f. The third screw 403c is rotated to drive the sliding sleeve 403a to slide on the vertical shaft 403b, and the guiding limit function is achieved through the matching of the grooves and the guiding ribs, so that the heights of the outer frame body 403f, the inner frame body 403g and the fourth screw 403h are adjusted, and finally the horizontal height of the sound guide tube 1 is driven to be adjusted, so that the comfort and the accuracy of controlling the insertion of the in-ear type hearing aid into the auditory canal are improved; in addition, due to the structural arrangement of the outer frame body 403f, the inner frame body 403g and the fourth screw 403h, the stability of the relative plug-in fixation of the cylinder cover 202 and the sleeve body 201 can be improved, so that a better sealing connection effect is achieved, the contact position between the fourth screw 403h and the outer frame body 403f can be changed by rotating the fourth screw 403h, and accordingly the outer frame body 403f and the inner frame body 403g are driven to perform relative movement or deviate from movement, so that the outer frame body 403f and the inner frame body 403g are conveniently and tightly connected or the outer frame body 403f and the inner frame body 403g are detached and separated; the bottom of the vertical shaft 403b is rotatably matched with the outer frame body 403f and is located at the inner side of the collar 403d, so that the vertical shaft 403b can rotate relative to the outer frame body 403f, after rotation, limiting fixation after rotation is achieved on the vertical shaft 403b through pushing the rotating positioning bolt 403e, and finally the angle position of the ear hook 401 is adjusted, so that more stable and comfortable hanging can be achieved.
The sound insulation measuring system of the in-ear hearing aid also comprises a plug rod assembly 404; one end of the ear hook 401 is rotatably matched with one end of the cross bar assembly 402 through a short shaft; the plunger assembly 404 includes a sliding plunger 404a, a support 404b, an unlocking tension spring 404c, and a pull block 404d; the middle part of the sliding inserted link 404a is in sliding fit with a support 404b, and the support 404b is fixed on the cross bar assembly 402; one end of the sliding inserted rod 404a is inserted into a transverse insertion hole penetrating through the ear hook 401, and the other end of the sliding inserted rod 404a is fixedly connected with a pull block 404d; the pull block 404d is fixedly connected with the support 404b through an unlocking tension spring 404 c. When the plunger assembly 404 is in use, the overall length of the cross bar assembly 402 is not adjustable so much that the sliding plunger 404a cannot be inserted into the transverse receptacle; the inserted link assembly 404 is used for limiting and fixing the relative positions of the ear hook 401 and the cross bar assembly 402, and the ear hook 401 can rotate at one end of the cross bar assembly 402, so that the invention is convenient to wear and test on the left ear or the right ear; after the ear hook 401 rotates 180 degrees, the ear hook can be inserted into the transverse jack through the sliding inserted rod 404a for limiting and fixing; when the insert rod assembly 404 is required to release the limit of the ear hook 401, the pull block 404d is pulled outwards to drive the unlocking tension spring 404c to stretch, and the sliding insert rod 404a is driven to be separated from the transverse insertion hole, so that the ear hook 401 can be rotated to be adjusted.
Principle of: the invention relates to an in-ear type hearing protector sound insulation measuring system, which is used for measuring an actual protection value and a personal sound attenuation value of an in-ear type hearing protector, wherein a sound box with a power amplifier can be adopted as a sound source for actively emitting various noises when the measurement is carried out, a sound field is provided for the personal sound attenuation value, and the sound pressure level outside an auditory canal can be measured through another pre-prepared test microphone; then, an in-ear type hearing protector is arranged on the acoustic duct 1, a central through hole of the in-ear type hearing protector is controlled to keep a certain relative seal with the acoustic duct 1, then the ear hanging bracket 4 is worn on the ear of a tester, the in-ear type hearing protector on the acoustic duct 1 is controlled to be inserted into an auditory canal, and after the in-ear type hearing protector is plugged in the auditory canal, the sound pressure level transmitted by the acoustic duct 1 is measured through the test microphone 3 in the sound insulation sleeve 2; finally, the output signals of the two microphones can be subjected to spectrum analysis through the two-channel handheld spectrum analyzer, the actual protection value and the personal sound attenuation value of the hearing protector are calculated, and the test work of the in-ear hearing protector is completed; the test microphone 3 is preferably a 1/4 "test microphone, a mini-microphone.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (7)
1. An in-ear type hearing protector sound insulation measuring system which is characterized in that: comprises an acoustic duct (1), an acoustic insulation sleeve (2), a test microphone (3) and a hanging bracket (4); one end of the sound guide tube (1) is inserted into the central through hole of the in-ear type hearing protector, and the other end of the sound guide tube (1) is in sealing fit connection with the opening end of the sound insulation sleeve (2); the sound insulation sleeve (2) is arranged on the hanging bracket (4); the test microphone (3) is arranged in the sound insulation sleeve (2) so as to measure the sound pressure level in the auditory canal after the auditory canal is plugged by the auditory canal protector;
an external thread structure is arranged on a pipe body of one end, close to the sound insulation sleeve (2), of the sound guide pipe (1), a limit ring (101) is connected to the external thread structure in a threaded fit mode, and the limit ring (101) is blocked on the outer side of the in-ear type hearing protector;
the inner side of the limiting ring (101) is provided with a sealing ring (102) attached to the in-ear type hearing protector, and the inner diameter of the sealing ring (102) is larger than the diameter of the central through hole of the in-ear type hearing protector;
also comprises an in-ear microphone (5); the ear-in microphone (5) comprises a microphone body (501), a spherical receiving box (502) and a first screw (503); one end of the spherical connecting box (502) is provided with a mounting groove, and a microphone body (501) is fixed in the mounting groove; the other end of the spherical connecting box (502) is fixedly connected with one end of a first screw rod (503), and the other end of the first screw rod (503) is in threaded fit in a pipe body of one end of the sound guide pipe (1) far away from the sound insulation sleeve (2);
the diameter of the spherical joint box (502) is larger than that of the sound guide pipe (1), and the radius of the spherical joint box (502) is smaller than that of the sound guide pipe (1);
the sound insulation sleeve (2) comprises a sleeve body (201), a sleeve cover (202) and a short pipe (203); one end of the sleeve body (201) is open and the other end is closed; one end of the cylinder cover (202) is hermetically sleeved at the open end of the sleeve body (201), and the other end of the cylinder cover (202) is fixedly connected and communicated with one end of the short pipe (203); the other end of the short pipe (203) is in sealing connection and communication with the sound guide pipe (1); the sleeve body (201) and the sleeve cover (202) are fixedly connected with the hanging bracket (4);
the sleeve body (201), the sleeve cover (202) and the short pipe (203) are made of sound insulation materials;
the hanger bracket (4) comprises an ear hook (401), a cross bar component (402) and a hanging component (403); one end of the ear hook (401) is connected with one end of the cross rod assembly (402) in a matching way, and the other end of the cross rod assembly (402) is connected with the hanging assembly (403) in a matching way; the hanging component (403) is connected with the sleeve body (201) and the cylinder cover (202) in a matching way;
the cross bar assembly (402) comprises a fixed cross bar (402 a), a sliding cross bar (402 b), a second screw (402 c) and a horizontal slider (402 d); one end of the sliding cross rod (402 b) is connected with the ear hook (401) in a matched mode, and the other end of the sliding cross rod (402 b) is in sliding fit in a horizontal slideway of the fixed cross rod (402 a); the horizontal sliding block (402 d) is in sliding fit in a limit slideway of the fixed cross rod (402 a) and is fixedly connected with the sliding cross rod (402 b); the middle thread of the second screw rod (402 c) is in transmission connection with the horizontal sliding block (402 d), and one end of the second screw rod (402 c) is in running fit on the fixed cross rod (402 a);
the hanging component (403) comprises a sliding sleeve (403 a), a vertical shaft (403 b), a third screw (403 c), a sleeve ring (403 d), a positioning bolt (403 e), an outer frame body (403 f), an inner frame body (403 g) and a fourth screw (403 h); the sliding sleeve (403 a) is fixed at one end of the fixed cross bar (402 a); the sliding sleeve (403 a) is in sliding fit on the vertical shaft (403 b), a groove is formed in the vertical shaft (403 b), and the groove is in sliding fit with the guide convex edge in the sliding sleeve (403 a); the upper end of the third screw rod (403 c) is rotatably connected to the top surface of the sliding sleeve (403 a), and the lower end of the third screw rod (403 c) is in threaded fit with the internal threaded hole of the vertical shaft (403 b); the bottom end of the vertical shaft (403 b) is in running fit on the outer frame body (403 f), a sleeve ring (403 d) is fixed on the outer frame body (403 f), the sleeve ring (403 d) is sleeved on the outer side of the vertical shaft (403 b), a positioning bolt (403 e) is in threaded fit on the sleeve ring (403 d), and the positioning bolt (403 e) is propped against the vertical shaft (403 b); the sleeve body (201) is fixed on the outer frame body (403 f), and the sleeve cover (202) is fixed on the inner frame body (403 g); one end of the fourth screw (403 h) is rotatably connected to the inner frame body (403 g), and the other end of the fourth screw (403 h) is in threaded fit with the inner threaded hole of the outer frame body (403 f).
2. An in-ear hearing aid sound insulation measurement system according to claim 1, wherein: the sound guide tube (1) is in threaded fit connection with the sound insulation sleeve (2).
3. An in-ear hearing aid sound insulation measurement system according to claim 2, wherein: and a sealing gasket is arranged at the joint of the sound guide tube (1) and the sound insulation sleeve (2).
4. An in-ear hearing aid sound insulation measurement system according to claim 1, wherein: the sound guide tube (1) is glued with a rubber sealing sleeve (103) so as to relatively seal the central through hole of the sound guide tube (1) and the ear-in type hearing protector.
5. An in-ear hearing aid sound insulation measurement system according to claim 1, wherein: the spherical surface of the spherical connecting box (502) is made of elastic rubber, and part of the spherical surface of the spherical connecting box (502) is blocked in the pipe orifice of the sound guide pipe (1).
6. An in-ear hearing aid sound insulation measurement system according to claim 1, wherein: the ear hook (401) is made of elastic plastic, and a memory cotton layer is wrapped outside the ear hook (401).
7. An in-ear hearing aid sound insulation measurement system according to claim 1, wherein: also includes a plunger assembly (404); one end of the ear hook (401) is in rotary fit with one end of the cross bar assembly (402) through a short shaft; the inserted link assembly (404) comprises a sliding inserted link (404 a), a support (404 b), an unlocking tension spring (404 c) and a pull block (404 d); the middle part of the sliding inserted rod (404 a) is in sliding fit on a support (404 b), and the support (404 b) is fixed on the cross rod assembly (402); one end of the sliding inserted rod (404 a) is inserted into a transverse insertion hole penetrating through the ear hook (401), and the other end of the sliding inserted rod (404 a) is fixedly connected with a pull block (404 d); the pull block (404 d) is fixedly connected with the support (404 b) through an unlocking tension spring (404 c).
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