CN113466345A - In-ear type hearing protector sound insulation measurement system - Google Patents
In-ear type hearing protector sound insulation measurement system Download PDFInfo
- Publication number
- CN113466345A CN113466345A CN202110622971.XA CN202110622971A CN113466345A CN 113466345 A CN113466345 A CN 113466345A CN 202110622971 A CN202110622971 A CN 202110622971A CN 113466345 A CN113466345 A CN 113466345A
- Authority
- CN
- China
- Prior art keywords
- ear
- sound
- sleeve
- hearing protector
- sliding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001012 protector Effects 0.000 title claims abstract description 95
- 238000009413 insulation Methods 0.000 title claims abstract description 75
- 238000005259 measurement Methods 0.000 title claims description 24
- 238000012360 testing method Methods 0.000 claims abstract description 38
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 210000000613 ear canal Anatomy 0.000 claims abstract description 21
- 239000000725 suspension Substances 0.000 claims abstract description 12
- 230000000670 limiting effect Effects 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 21
- 230000037431 insertion Effects 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 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 7
- 238000000034 method Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000009471 action 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
- 230000008859 change Effects 0.000 description 2
- 231100000895 deafness Toxicity 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000016354 hearing loss disease Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
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
Landscapes
- 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 a hearing-protective device measuring device, in particular to a sound insulation measuring system of an in-ear type hearing-protective device, which comprises a sound guide pipe, a sound insulation sleeve, a test microphone and a suspension loop bracket, wherein the sound guide pipe is arranged in the sound insulation sleeve; 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 open end of the sound insulation sleeve; the sound insulation sleeve is arranged on the suspension loop bracket; the test microphone is mounted within the acoustic sleeve to measure the sound pressure level within the ear canal after the in-ear hearing protector is sealed within the ear canal. The sound insulation measuring system of the in-ear type hearing protector, disclosed by the invention, has the advantages that the sound guide pipe adopted in the system can be used for guiding and transmitting sound and can also be used for installing and fixing the in-ear type hearing protector, the working requirement of the system is effectively met, and the overall volume of the system is reduced.
Description
Technical Field
The invention relates to the field of hearing protector measuring equipment, in particular to an in-ear type hearing protector sound insulation measuring system.
Background
Noise from a physiological point of view, where it is irritating, the unwanted sound is called noise. When the noise energy reaches a certain level, the hearing of the person is damaged. Hearing protectors are widely used in industrial noise environments as a means of protecting the human ear from noise exposure. The sound attenuation capability is crucial to the level of the protective properties.
The protection effect of the existing test hearing protector mainly comprises two types, one type is to invite volunteers, carry on the hearing protector, play sound, take subjective feeling measurement, and the second type is to adopt an artificial head trunk simulator and use a simulated ear to measure the protection effect of the hearing protector. But neither measure the actual sound received by the ear when wearing the hearing protector.
Disclosure of Invention
The invention aims to provide a sound insulation measuring system of an in-ear type hearing protector, which can effectively solve the problems in the prior art.
The purpose of the invention is realized by the following technical scheme:
a sound insulation measuring system of an in-ear type sound protector comprises a sound guide pipe, a sound insulation sleeve, a test microphone and an ear 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 open end of the sound insulation sleeve; the sound insulation sleeve is arranged on the suspension loop bracket; the test microphone is mounted within the acoustic sleeve to measure the sound pressure level within the ear canal after the in-ear hearing protector is sealed within the ear canal.
Preferably, the sound guide pipe is in threaded fit connection with the sound insulation sleeve.
Preferably, a sealing gasket is arranged at the joint of the sound guide pipe and the sound insulation sleeve.
Preferably, an external thread structure is arranged on the pipe body at one end, close to the sound insulation sleeve, of the sound guide pipe, the external thread structure is in thread fit connection with a limiting ring, and the limiting ring is blocked outside 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 hearing protector, and the inner diameter of the sealing ring is larger than the diameter of the central through hole of the in-ear hearing protector.
Preferably, a rubber sealing sleeve is glued on the sound conduit to seal the sound conduit and the central through hole of the in-ear type hearing protector relatively.
Preferably, the sound insulation measuring system of the in-ear type hearing protector further comprises an in-ear type microphone; the in-ear microphone comprises a microphone body, a spherical connecting box and a first screw rod; one end of the spherical joint box is provided with an installation groove, and a microphone body is fixed in the installation 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 pipe body at one end, far away from the sound insulation sleeve, of the sound guide pipe.
Preferably, the diameter of the spherical mounting box is larger than the diameter of the sound guide tube, and the radius of the spherical mounting box is smaller than the diameter of the sound guide tube.
Preferably, the spherical surface of the spherical joint box is made of elastic rubber, and part of the spherical surface of the spherical joint box is blocked in the pipe orifice of the sound conduit.
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 sleeved at the open end of the sleeve body in a sealing manner, 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 hermetically connected and communicated with the sound guide pipe; the sleeve body and the sleeve cover are fixedly connected with the hanger bracket.
Preferably, the sleeve body, the cylinder cover and the short pipe are made of sound insulation materials, the sound insulation materials are preferably multilayer sound insulation glass, and sound insulation cotton wraps the outer walls of the sleeve body, the cylinder cover and the short pipe.
Preferably, the hanger bracket comprises an ear hanger, a cross rod assembly and a hanging assembly; one end of the ear hook is connected to one end of the cross rod assembly in a matching mode, and the other end of the cross rod assembly is connected to the hanging assembly in a matching mode; the suspension assembly is connected with the sleeve body and the sleeve cover in a matching 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 matching way, and the other end of the sliding cross rod is matched in the horizontal slideway of the fixed cross rod in a sliding way; the horizontal sliding block is in sliding fit in the limiting slide way of the fixed cross rod and is fixedly connected with the sliding cross rod; the middle part of the second screw rod is in threaded transmission connection with the horizontal sliding block, and one end of the second screw rod is in running fit with the fixed cross rod.
Preferably, the hoisting assembly comprises a sliding sleeve, a vertical shaft, a third screw, a lantern ring, a positioning bolt, an outer frame body, an inner frame body and a fourth screw; the sliding sleeve is fixed at one end of the fixed cross rod; the sliding sleeve is in sliding fit with the vertical shaft, a groove is formed in the vertical shaft, and the groove is in sliding fit with the guide convex edge in the sliding sleeve; the upper end of the third screw rod is rotatably 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 rotatably matched on the outer frame body, the lantern ring is fixed on the outer frame body and 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 pressed on 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 type hearing protector further comprises an insertion rod assembly; one end of the ear hook is rotatably matched with one end of the cross rod component through a short shaft; the inserted bar component comprises a sliding inserted bar, a support, an unlocking tension spring and a pulling block; the middle part of the sliding inserted rod is in sliding fit with the support, and the support is fixed on the cross rod assembly; one end of the sliding insertion rod is inserted into a transverse insertion hole penetrating through the ear hook, and the other end of the sliding insertion rod is fixedly connected with the pull block; the pull block and the support are fixedly connected through an unlocking tension spring.
The invention has the beneficial effects that:
according to the in-ear type sound-insulation measuring system for the sound protector, the sound guide pipe adopted in the system can be used for guiding and transmitting sound and can also be used for installing and fixing the in-ear type sound protector, so that the working requirement of the system is effectively met, and the overall volume of the system is reduced; the adjustable ear hanging bracket is adopted in the sound conduit, so that the wearing requirements of different users can be met conveniently, the in-ear type sound protector arranged on the sound conduit can be controlled to be inserted into the auditory canal more comfortably, and the insertion depth can be adjusted properly; the sound-proof sleeve is internally provided with a test microphone for measurement and an in-ear microphone directly inserted into the ear canal for measurement, so that the sound pressure level actually received by the ear of a person can be effectively measured, the actual protection value and the personal sound attenuation value of the in-ear type sound protector are obtained, and a user can find the in-ear type sound protector suitable for himself, thereby reducing occupational hazards such as noise deafness caused by noise.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first general schematic diagram provided in accordance with an embodiment of the present invention;
FIG. 2 is a second overall view provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional structural view provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an acoustic catheter according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an acoustical sleeve provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural view of a hanger bracket according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an ear hook according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a cross bar assembly provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a suspension assembly according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram 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 sealing boot 103; a sound-insulating sleeve 2; a sleeve body 201; a cartridge cover 202; a short tube 203; testing the microphone 3; a suspension loop bracket 4; an ear hook 401; a cross bar assembly 402; a fixed crossbar 402 a; a sliding crossbar 402 b; a second screw 402 c; a horizontal slider 402 d; a hitch assembly 403; a sliding sleeve 403 a; the vertical axis 403 b; a third screw 403 c; a collar 403 d; a positioning bolt 403 e; an outer frame body 403 f; an inner frame body 403 g; a fourth screw 403 h; a plunger assembly 404; a sliding plunger 404 a; a support 404 b; the tension spring 404c is unlocked; a pull block 404 d; an in-ear microphone 5; a microphone body 501; a spherical joint box 502; a first screw 503.
Detailed Description
In order to make those skilled in the art 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 a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
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 disposed 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 will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for understanding and reading the contents disclosed in the specification, and are not used for limiting the conditions that the present application can implement, so the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the technical content disclosed in the present application without affecting the efficacy and the achievable purpose of the present application. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present application, and changes or modifications in the relative relationship may be made without substantial technical changes.
The invention is described in further detail below with reference to fig. 1-11.
Example one
As shown in fig. 1-11, an in-ear hearing protector sound insulation measurement system includes a sound conduit 1, a sound insulating sleeve 2, a test microphone 3, and an ear mount 4; one end of the sound guide pipe 1 is inserted into the central through hole of the in-ear type hearing protector, and the other end of the sound guide pipe 1 is connected with the open end of the sound insulation sleeve 2 in a sealing fit manner; the sound insulation sleeve 2 is arranged on the suspension loop bracket 4; the test microphone 3 is mounted in the acoustic sleeve 2 for measuring the sound pressure level in the ear canal after the in-ear hearing protector has been closed off in the ear canal.
The invention relates to a sound insulation measuring system of an in-ear type sound protector, which is used for measuring the actual protection value and the personal sound attenuation value of the in-ear type sound protector, wherein the in-ear type sound protector is mainly an earplug, a sound box with a power amplifier can be adopted as a sound source when measuring, the sound source is used for actively emitting various noises, a sound field is provided for the personal sound attenuation value, and the sound pressure level outside an ear canal can be measured by another prepared testing microphone; then, an in-ear type sound protector is installed on the sound conduit 1, a central through hole of the in-ear type sound protector is controlled to be sealed with the sound conduit 1 in a certain relative mode, then the ear-hanging support 4 is worn on the ear of a tester, the in-ear type sound protector on the sound conduit 1 is controlled to be inserted into the ear canal, and after the in-ear type sound protector is blocked in the ear canal, the sound pressure level transmitted by the sound conduit 1 is measured through a test microphone 3 in a sound insulation sleeve 2; finally, the output signals of the two microphones can be subjected to spectrum analysis simultaneously through the dual-channel handheld spectrum analyzer, the actual protection value and the personal sound attenuation value of the in-ear type sound protector are calculated, and the testing work of the in-ear type sound protector is completed; the test microphone 3 is preferably an 1/4 "test microphone, a mini microphone.
The sound guide pipe 1 is in threaded fit connection with the sound insulation sleeve 2, and is convenient to detach and install.
And a sealing gasket is arranged at the joint of the sound guide pipe 1 and the sound insulation sleeve 2.
The sound guide pipe 1 with sound insulation sleeve 2 all adopts the better material of sound insulation effect to make, just the sound guide pipe 1 with sound insulation sleeve 2's junction is equipped with seal ring, is favorable to improving sound insulation and hinders sound effect, guarantees the accuracy of sound insulation sleeve 2 internal test microphone 3 tests.
The sound guide pipe 1 is provided with an external thread structure on one end pipe body close to the sound insulation sleeve 2, the external thread structure is in thread fit connection with a limiting ring 101, and the limiting ring 101 is blocked outside 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 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 hearing protector.
The sound conduit 1 is glued with a rubber sealing sleeve 103 to seal the center through hole of the sound conduit 1 and the in-ear hearing protector relatively.
The limiting ring 101 is arranged to conveniently block and limit the outer side of the in-ear type hearing protector and prevent the in-ear type hearing protector from being separated from the sound guide tube 1 when the in-ear type hearing protector is controlled to be inserted into an ear canal, and the in-ear type hearing protector is mainly an earplug and is usually made of soft rubber or soft plastic; besides the blocking function, the contact position of the limiting ring 101 and the external thread structure of the sound guide pipe 1 is changed by rotating the limiting ring, so that earplugs with different lengths can be conveniently and fixedly connected with the sound guide pipe 1; sealing ring 102 closely laminates with the in-ear formula sound protector, plays certain sealed effect, and the setting of rubber seal cover 103 improves in-ear formula sound protector central through-hole with the leakproofness of sound pipe 1 improves the effect that gives sound insulation, reduces to set up the influence of central through-hole to the effect that gives sound insulation of in-ear formula sound protector on the measured in-ear formula sound protector.
The invention relates to a test case of an in-ear type sound insulation quantity measuring system of a hearing protector, which comprises the following steps:
(1) test objects: a silica gel earplug;
(2) the test method comprises the following steps: during testing, firstly, the silica gel earplug is punched through professional equipment, and the opening of the silica gel earplug is controlled to be perfectly attached to the sound conduit 1; the sound guide tube 1 penetrates through a 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 clamped and 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 central through hole of the silica gel earplug is blocked to a certain extent; the whole body of the invention is worn on the ears of a test person through the ear hanging bracket 4, and the silica gel earplugs on the sound guide tube 1 are controlled to be inserted into the ears; then, starting a sound source to emit various noises, providing a sound field for a personal sound attenuation value, and measuring the sound pressure level outside the auditory canal by using another prepared testing microphone; the sound pressure level inside the ear is measured by the test microphone 3 inside the invention, thereby calculating the sound insulation amount of the tested silica gel earplug.
Example two
As shown in fig. 1 to 11, the system for measuring the sound insulation of the in-ear type hearing protector further comprises an in-ear microphone 5; the in-ear microphone 5 comprises a microphone body 501, a spherical joint box 502 and a first screw 503; one end of the spherical joint 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 joint box 502 is fixedly connected with one end of a first screw 503, and the other end of the first screw 503 is in threaded fit in a pipe body at one end of the sound guide pipe 1 far away from the sound insulation sleeve 2. The in-ear microphone 5 is a detachable structure, and is mainly used for measuring insertion loss, namely, before and after processing noise, on a certain reference point, the difference between the measured sound pressure level or other sound quantities is measured, namely, a reference point a is taken in the ear canal, the sound pressure level a before the in-ear hearing protector is worn at the point and the sound pressure level a 'after the in-ear hearing protector is worn at the point are measured, and then IL is equal to a-a', and the insertion loss is obtained; when the insertion loss is measured, firstly, an in-ear type hearing protector earplug on a sound guide pipe 1 is taken down, then an in-ear type microphone 5 is installed on the sound guide pipe 1 through a first screw 503, then the device is worn on the ear of a tester, and a microphone body 501 is controlled to be positioned in an ear canal, wherein the microphone body 501 adopts an ultra-small-volume MEMS type microphone and is placed in the ear canal to test the sound pressure level A received by the ear of the tester; then the in-ear type hearing protection earplug is arranged on the sound guide pipe 1 and worn, and the insertion loss is obtained after the sound pressure level A' after the in-ear type hearing protection earplug is worn is measured; after the sound pressure level A 'after the in-ear type sound protector is worn is measured, the sound pressure level A' can be compared with the sound pressure level obtained by testing the microphone 3, and a plurality of groups of test data are adopted to obtain an average value, so that a more accurate sound insulation measurement result of the in-ear type sound protector is obtained, the insertion loss, the actual protection value and the personal sound attenuation value of the in-ear type sound protector are judged, a user can conveniently find the in-ear type sound protector suitable for the user, and occupational hazards such as noise deafness and the like caused by noise are reduced.
The diameter of the ball-shaped mounting box 502 is larger than the diameter of the sound guide tube 1, and the radius of the ball-shaped mounting box 502 is smaller than the diameter of the sound guide 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 pipe 1, and the sphere shutoff of spherical joint box 502 is in the mouth of pipe department of sound pipe 1, can play better sound insulation and hinder the effect of sound, 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 sleeved at the open end of the sleeve body 201 in a sealing manner, 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 hermetically connected and communicated with the sound guide pipe 1; the sleeve body 201 and the sleeve cover 202 are fixedly connected with the ear hanging bracket 4.
The sleeve body 201, the sleeve cover 202 and the short pipe 203 are made of sound insulation materials.
The sound insulating sleeve 2 is provided with a sleeve body 201 and a sleeve cover 202, so that the test microphone 3 can be conveniently installed in the sleeve body 201 or taken out from the interior of the sleeve body 201.
EXAMPLE III
As shown in fig. 1-11, the hanger bracket 4 comprises an ear hanger 401, a cross bar assembly 402 and a hanging assembly 403; one end of the ear hook 401 is connected to one end of the cross bar component 402 in a matching way, and the other end of the cross bar component 402 is connected to the hanging component 403 in a matching way; the suspension assembly 403 is connected with the sleeve body 201 and the sleeve cover 202 in a matching manner. The ear hook 401 is made of plastic with certain elasticity, and the ear hook 401 is used for being hung on ears to realize wearing of the invention; the overall length of the cross bar component 402 can be adjusted appropriately, so that the depth of the in-ear type hearing protector installed on the sound conduit 1 of the invention inserted into the ear canal can be controlled conveniently, and thus the requirements of different tests can be met; the suspension assembly 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 test requirements.
The ear-hang 401 is made of elastic plastic, the memory cotton layer wraps the outside of the ear-hang 401, and the applicability and comfort of wearing the ear-hang 401 are improved.
The cross bar assembly 402 comprises a fixed cross bar 402a, a sliding cross bar 402b, a second screw 402c and a horizontal slider 402 d; one end of the sliding cross bar 402b is connected with the ear hook 401 in a matching way, and the other end of the sliding cross bar 402b is matched in the horizontal slide way of the fixed cross bar 402a in a sliding way; the horizontal sliding block 402d is in sliding fit in a limiting slide way of the fixed cross bar 402a and is fixedly connected with the sliding cross bar 402 b; the middle part of the second screw rod 402c is in threaded transmission connection with the horizontal sliding block 402d, and one end of the second screw rod 402c is in rotating fit with the fixed cross rod 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 between the second screw and the horizontal sliding block 402d, so that the horizontal sliding block 402d drives the sliding cross bar 402b to slide in the horizontal sliding way of the fixed cross bar 402a, thereby completing the adjustment of the overall length of the cross bar assembly 402.
The hanging component 403 comprises 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 403 h; the sliding sleeve 403a is fixed at one end of the fixed cross bar 402 a; the sliding sleeve 403a is in sliding fit with the vertical shaft 403b, a groove is arranged on the vertical shaft 403b, and the groove is in sliding fit with a guiding rib in the sliding sleeve 403 a; 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 with the internal threaded hole of the vertical shaft 403 b; the bottom end of the vertical shaft 403b is rotatably matched with 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 with the collar 403d, and the positioning bolt 403e is pressed on the vertical shaft 403 b; the sleeve body 201 is fixed on the outer frame body 403f, and the sleeve cover 202 is fixed on the inner frame body 403 g; one end of the fourth screw 403h is rotatably connected to the inner frame body 403g, and the other end of the fourth screw 403h is in threaded fit with the inner threaded hole of the outer frame body 403 f. The third screw 403c is rotated to drive the sliding sleeve 403a to slide on the vertical shaft 403b, and the guiding and limiting effects are achieved through the matching of the groove and the guiding convex rib, 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 in-ear type hearing protector to be inserted into the ear canal are improved; in addition, the structural arrangement of the outer frame body 403f, the inner frame body 403g and the fourth screw 403h can also improve the stability of the cylinder cover 202 and the cylinder body 201 in relative insertion and fixation, 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, so that the outer frame body 403f and the inner frame body 403g are driven to move relatively or move away from each other, and the outer frame body 403f and the inner frame body 403g are conveniently tightly connected or the outer frame body 403f and the inner frame body 403g are detached and separated; the bottom end of the vertical shaft 403b is rotatably matched with the outer frame body 403f and is located on the inner side of the lantern ring 403d, so that the vertical shaft 403b can rotate relative to the outer frame body 403f, the vertical shaft 403b is pressed against the vertical shaft 403b through the rotating positioning bolt 403e after rotation to realize limiting and fixing after rotation, and finally the angle position of the ear hook 401 is adjusted to achieve more stable and comfortable hanging.
The sound insulation measuring system of the in-ear type hearing protector further comprises an insert rod assembly 404; one end of the ear hook 401 is rotatably matched with one end of the cross rod assembly 402 through a short shaft; the plunger assembly 404 comprises a sliding plunger 404a, a support 404b, an unlocking tension spring 404c and a pull block 404 d; the middle part of the sliding inserted rod 404a is in sliding fit with the support 404b, and the support 404b is fixed on the cross rod assembly 402; one end of the sliding insertion rod 404a is inserted into a transverse insertion hole penetrating through the ear hook 401, and the other end of the sliding insertion rod 404a is fixedly connected with a pull block 404 d; the pulling block 404d is fixedly connected with the support 404b through an unlocking tension spring 404 c. When the inserted bar assembly 404 is used, the overall length of the cross bar assembly 402 cannot be adjusted too large, so as to prevent the sliding inserted bar 404a from being inserted into the transverse insertion hole; the inserted link assembly 404 is used for limiting and fixing the relative positions of the ear hook 401 and the cross rod assembly 402, and the ear hook 401 can rotate at one end of the cross rod assembly 402, so that the left ear test or the right ear test can be conveniently carried out by wearing the invention; after the ear hook 401 rotates 180 degrees, the ear hook can be limited and fixed by inserting the sliding insertion rod 404a into the transverse insertion hole; when the inserted link assembly 404 is required to release the limitation on the ear hook 401, the pull block 404d is pulled outwards to drive the unlocking tension spring 404c to stretch, and the sliding inserted link 404a is driven to be separated from the transverse insertion hole, so that the ear hook 401 can be rotated to adjust.
The principle is as follows: the sound insulation measuring system of the in-ear type sound protector is used for measuring the actual protection value and the personal sound attenuation value of the in-ear type sound protector, and during measurement, a sound box with a power amplifier can be used as a sound source for actively emitting various noises so as to provide a sound field for the personal sound attenuation value, and the sound pressure level outside an ear canal can be measured by another pre-prepared testing microphone; then, an in-ear type sound protector is installed on the sound conduit 1, a central through hole of the in-ear type sound protector is controlled to be sealed with the sound conduit 1 in a certain relative mode, then the ear-hanging support 4 is worn on the ear of a tester, the in-ear type sound protector on the sound conduit 1 is controlled to be inserted into the ear canal, and after the in-ear type sound protector is blocked in the ear canal, the sound pressure level transmitted by the sound conduit 1 is measured through a test microphone 3 in a sound insulation sleeve 2; finally, the output signals of the two microphones can be subjected to spectrum analysis simultaneously through the dual-channel handheld spectrum analyzer, the actual protection value and the personal sound attenuation value of the in-ear type sound protector are calculated, and the testing work of the in-ear type sound protector is completed; the test microphone 3 is preferably an 1/4 "test microphone, a mini microphone.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (16)
1. The utility model provides an in-ear formula hearing protector sound insulation volume measurement system which characterized in that: comprises a sound conduit (1), a sound insulation sleeve (2), a test microphone (3) and a suspension loop bracket (4); one end of the sound guide pipe (1) is inserted into the central through hole of the in-ear type hearing protector, and the other end of the sound guide pipe (1) is connected with the open end of the sound insulation sleeve (2) in a sealing fit manner; the sound insulation sleeve (2) is arranged on the suspension loop bracket (4); the test microphone (3) is mounted in the acoustic sleeve (2) to measure the sound pressure level in the ear canal after the in-ear hearing protector has been plugged in the ear canal.
2. The in-ear hearing protector acoustic insulation measurement system of claim 1, wherein: the sound guide pipe (1) is in threaded fit connection with the sound insulation sleeve (2).
3. The in-ear hearing protector acoustic insulation measurement system of claim 2, wherein: and a sealing gasket is arranged at the joint of the sound guide pipe (1) and the sound insulation sleeve (2).
4. The in-ear hearing protector acoustic insulation measurement system of claim 1, wherein: the sound guide pipe (1) is close to an external thread structure is arranged on a pipe body at one end of the sound insulation sleeve (2), the external thread structure is in thread fit connection with a limiting ring (101), and the limiting ring (101) is blocked outside the in-ear type hearing protector.
5. The in-ear hearing protector acoustic insulation measurement system of claim 4, wherein: the inner side of the limiting ring (101) is provided with a sealing ring (102) attached to the in-ear hearing protector, and the inner diameter of the sealing ring (102) is larger than the diameter of a central through hole of the in-ear hearing protector.
6. The in-ear hearing protector acoustic insulation measurement system of claim 4, wherein: the sound guide tube (1) is glued with a rubber sealing sleeve (103) to seal the center through hole of the sound guide tube (1) and the in-ear type hearing protector relatively.
7. The in-ear hearing protector acoustic insulation measurement system of claim 1, wherein: further comprising an in-ear microphone (5); the in-ear microphone (5) comprises a microphone body (501), a spherical joint box (502) and a first screw (503); one end of the spherical joint 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 joint 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 at one end, far away from the sound insulation sleeve (2), of the sound guide pipe (1).
8. The in-ear hearing protector acoustic insulation measurement system of claim 7, wherein: 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).
9. The in-ear hearing protector acoustic insulation measurement system of claim 8, 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 plugged in the pipe orifice of the sound conduit (1).
10. The in-ear hearing protector acoustic insulation measurement system of claim 1, wherein: 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 sleeved at the open end of the sleeve body (201) in a sealing manner, 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 hermetically connected and communicated with the sound guide pipe (1); the sleeve body (201) and the sleeve cover (202) are fixedly connected with the hanger bracket (4).
11. The in-ear hearing protector acoustic insulation measurement system of claim 10, wherein: the sleeve body (201), the sleeve cover (202) and the short pipe (203) are made of sound insulation materials.
12. The in-ear hearing protector acoustic insulation measurement system of claim 11, wherein: the hanger bracket (4) comprises an ear hanger (401), a cross rod component (402) and a hanging component (403); one end of the ear hook (401) is connected to one end of the cross rod assembly (402) in a matching mode, and the other end of the cross rod assembly (402) is connected to the hanging assembly (403) in a matching mode; the suspension assembly (403) is in fit connection with the sleeve body (201) and the sleeve cover (202).
13. The in-ear hearing protector acoustic insulation measurement system of claim 12, wherein: the ear hook (401) is made of elastic plastic, and a memory cotton layer wraps the outside of the ear hook (401).
14. The in-ear hearing protector acoustic insulation measurement system of claim 12, wherein: the cross bar assembly (402) comprises a fixed cross bar (402a), a sliding cross bar (402b), a second screw (402c) and a horizontal sliding block (402 d); one end of the sliding cross rod (402b) is connected with the ear hook (401) in a matched mode, and the other end of the sliding cross rod (402b) is matched in a horizontal slide way of the fixed cross rod (402a) in a sliding mode; the horizontal sliding block (402d) is in sliding fit in a limiting slide way of the fixed cross rod (402a) and is fixedly connected with the sliding cross rod (402 b); the middle part of the second screw rod (402c) is in threaded transmission connection with the horizontal sliding block (402d), and one end of the second screw rod (402c) is in running fit with the fixed cross rod (402 a).
15. The in-ear hearing protector acoustic insulation measurement system of claim 14, wherein: the hoisting assembly (403) comprises a sliding sleeve (403a), a vertical shaft (403b), a third screw (403c), a collar (403d), a positioning bolt (403e), an outer frame body (403f), an inner frame body (403g) and a fourth screw (403 h); the sliding sleeve (403a) is fixed at one end of the fixed cross bar (402 a); the sliding sleeve (403a) is in sliding fit with the vertical shaft (403b), a groove is formed in the vertical shaft (403b), and the groove is in sliding fit with a guide rib in the sliding sleeve (403 a); the upper end of the third screw rod (403c) is rotatably connected to the top surface of the sliding sleeve (403a), and the lower end of the third screw rod (403c) is in threaded fit with the internal threaded hole of the vertical shaft (403 b); the bottom end of the vertical shaft (403b) is rotatably matched on the outer frame body (403f), a lantern ring (403d) is fixed on the outer frame body (403f), the lantern ring (403d) is sleeved on the outer side of the vertical shaft (403b), a positioning bolt (403e) is in threaded fit with the lantern ring (403d), and the positioning bolt (403e) is pressed on the vertical shaft (403 b); the sleeve body (201) is fixed on the outer frame body (403f), and the sleeve cover (202) is fixed on the inner frame body (403 g); one end of the fourth screw (403h) is rotatably connected to the inner frame body (403g), and the other end of the fourth screw (403h) is in threaded fit with the inner threaded hole of the outer frame body (403 f).
16. The in-ear hearing protector acoustic insulation measurement system of claim 15, wherein: further comprising a plunger assembly (404); one end of the ear hook (401) is rotatably matched with one end of the cross rod assembly (402) through a short shaft; the inserted bar assembly (404) comprises a sliding inserted bar (404a), a support (404b), an unlocking tension spring (404c) and a pulling block (404 d); the middle part of the sliding inserted rod (404a) is in sliding fit with a support (404b), and the support (404b) is fixed on the cross rod assembly (402); one end of the sliding insertion rod (404a) is inserted into a transverse insertion hole penetrating through the ear hook (401), and the other end of the sliding insertion rod (404a) is fixedly connected with a pull block (404 d); the pulling block (404d) and the support (404b) are fixedly connected through an unlocking tension spring (404 c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110622971.XA CN113466345B (en) | 2021-06-04 | 2021-06-04 | In-ear type hearing protector sound insulation measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110622971.XA CN113466345B (en) | 2021-06-04 | 2021-06-04 | In-ear type hearing protector sound insulation measuring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113466345A true CN113466345A (en) | 2021-10-01 |
| CN113466345B CN113466345B (en) | 2024-03-26 |
Family
ID=77872372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110622971.XA Active CN113466345B (en) | 2021-06-04 | 2021-06-04 | In-ear type hearing protector sound insulation measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113466345B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050254667A1 (en) * | 2004-05-17 | 2005-11-17 | Dosebusters | Method and apparatus for continuous noise exposure monitoring |
| US20080011084A1 (en) * | 2006-07-13 | 2008-01-17 | Phonak Ag | Method for in-situ measuring of acoustic attenuation and system therefor |
| US20080181441A1 (en) * | 2005-10-11 | 2008-07-31 | Smith Richard C | Adjustable length ear insert |
| WO2017173310A1 (en) * | 2016-03-31 | 2017-10-05 | Wisys Technology Foundation, Inc. | In-ear noise dosimeter |
| CN207850530U (en) * | 2018-03-01 | 2018-09-11 | 广州工乐科技有限公司 | A kind of In-Ear noise-measuring system |
| CN108896665A (en) * | 2018-08-27 | 2018-11-27 | 国网山东省电力公司电力科学研究院 | The applicability appraisal procedure of workplace noiseproof earplug |
| CN210037171U (en) * | 2019-05-05 | 2020-02-07 | 东莞英达士声学设备有限公司 | Laboratory for subjective and objective evaluation of acoustic performance of hearing protector |
| CN210298085U (en) * | 2019-08-09 | 2020-04-10 | 深圳市静音科技有限公司 | Auxiliary hearing device with intelligent Bluetooth function |
-
2021
- 2021-06-04 CN CN202110622971.XA patent/CN113466345B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050254667A1 (en) * | 2004-05-17 | 2005-11-17 | Dosebusters | Method and apparatus for continuous noise exposure monitoring |
| US20080181441A1 (en) * | 2005-10-11 | 2008-07-31 | Smith Richard C | Adjustable length ear insert |
| US20080011084A1 (en) * | 2006-07-13 | 2008-01-17 | Phonak Ag | Method for in-situ measuring of acoustic attenuation and system therefor |
| WO2017173310A1 (en) * | 2016-03-31 | 2017-10-05 | Wisys Technology Foundation, Inc. | In-ear noise dosimeter |
| CN207850530U (en) * | 2018-03-01 | 2018-09-11 | 广州工乐科技有限公司 | A kind of In-Ear noise-measuring system |
| CN108896665A (en) * | 2018-08-27 | 2018-11-27 | 国网山东省电力公司电力科学研究院 | The applicability appraisal procedure of workplace noiseproof earplug |
| CN210037171U (en) * | 2019-05-05 | 2020-02-07 | 东莞英达士声学设备有限公司 | Laboratory for subjective and objective evaluation of acoustic performance of hearing protector |
| CN210298085U (en) * | 2019-08-09 | 2020-04-10 | 深圳市静音科技有限公司 | Auxiliary hearing device with intelligent Bluetooth function |
Non-Patent Citations (1)
| Title |
|---|
| 窦丹丹等: "入耳式护听器声衰减测试方法可行性研究", 2020’中国西部声学学术交流会论文集, pages 203 - 205 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113466345B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6687377B2 (en) | Method and apparatus for determining in situ the acoustic seal provided by an in-ear device | |
| US6139507A (en) | Method and apparatus for measuring acoustic power flow within an ear canal | |
| WO2007145853A3 (en) | Stimulus-evoked vestibular evaluation system, method and apparatus | |
| CA2557255A1 (en) | A method and a device for real ear measurements | |
| JP2009516409A (en) | Noise elimination earphone | |
| US20150047651A1 (en) | Compact high fidelity earplug | |
| Voix et al. | The objective measurement of individual earplug field performance | |
| WO2004092700A3 (en) | A method and device for determining acoustical transfer impedance | |
| JP2003512868A (en) | Insertable earphone assembly for hearing test and method of manufacturing the same | |
| CN113466345B (en) | In-ear type hearing protector sound insulation measuring system | |
| Zurbrügg et al. | Investigations on the physical factors influencing the ear canal occlusion effect caused by hearing aids | |
| Dillon et al. | Accuracy of twelve methods for estimating the real ear gain of hearing aids | |
| US6656128B1 (en) | Device and method for treating hypernasality | |
| HU224949B1 (en) | Acoustic coupling device and apparatus | |
| DE102012022795A1 (en) | Probe and method for measuring OAE by means of active sound attenuation | |
| Martin | Dependence of acoustic attenuation of hearing protectors on incident sound level. | |
| HU224670B1 (en) | Acoustic coupling device and method of testing the hearing of a subject | |
| CN103027688A (en) | Otoacoustic emission simulation and test system | |
| US20220174389A1 (en) | Earplug, sound collector, and volume measurement system | |
| WO2020028796A1 (en) | Systems and methods for eustachian tube function, intra-aural, and bolus transit sound analysis | |
| Feigin et al. | The effect of reference microphone placement on sound pressure levels at an ear level hearing aid microphone | |
| CN220385083U (en) | Stethoscope | |
| Raicevich et al. | Wide band pneumatic sound system for MEG | |
| CN213606374U (en) | Hearing detection earplug | |
| CN214621461U (en) | Noise reduction performance testing device of industrial noise protection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |