A weak sound amplification device and method of use thereof

Abstract

The application discloses a weak sound amplification device in the field of sound amplification technology, which comprises a base, a controller, a sealed shell and a carrier table; the controller is electrically connected with a signal component, a sound component and a power amplifier, and the power amplifier is electrically connected with a loudspeaker; the sound component comprises a bionic sound channel, the bionic sound channel is fixed with a tympanic membrane at the tail end, the tympanic membrane is attached to the left end of an auditory ossicular chain, and the auditory ossicular chain is hung on an auditory ossicular chain beam; the signal component comprises a manual workbench, a precision workbench and a piezoelectric stack support, the piezoelectric stack support is internally provided with a piezoelectric stack, the front end surface of the piezoelectric stack support is fixedly connected with the rear end of a probe support, and the front end of the probe support is provided with a conductive probe; the auditory ossicular chain and the auditory ossicular chain beam are made of conductive material and are electrically connected; the manual workbench, the precision workbench and the piezoelectric stack are used for adjusting the distance between the front end of the conductive probe and the right end of the auditory ossicular chain in three stages, so that the two are connected with the controller in series to form a closed quantum tunneling circuit. The application solves the problem of difficult weak sound collection.

Description

Technical Field

[0001] This invention relates to the field of sound amplification technology, and in particular to a weak sound amplification device and its usage method. Background Technology

[0002] In fields such as biological research and microenvironment monitoring, it is often necessary to accurately collect and quantitatively analyze the faint sounds emitted by small organisms such as ants and small insects. However, the sound intensity of such faint sounds is extremely low, and conventional sound collection and amplification devices are limited by their own adjustment precision, signal conversion capabilities, and external noise interference, making it difficult to effectively collect and clearly amplify such faint sounds. At the same time, traditional sound amplification devices are mostly based on the principle of pure electrical signal amplification, lacking the preliminary physical amplification stage for faint sounds, and have insufficient ability to convert and accurately capture nanoscale mechanical vibrations, thus failing to meet the needs of collecting and analyzing faint sounds at the microscale.

[0003] In existing technologies, some sound acquisition devices employ simple acoustic focusing structures for preprocessing, but the focusing effect is limited, and they lack integration with microscopic electrical signal conversion technology, resulting in poor recognition and amplification of extremely weak sounds. Furthermore, some microscopic signal detection devices are only suitable for detecting electrical and optical signals, unable to achieve precise cascaded conversion of "sound-mechanical vibration-electrical signal," making them unsuitable for direct application to amplifying weak sounds. In addition, conventional devices have low precision in adjusting mechanical components, failing to achieve precise nanometer-level spacing control and effectively triggering the quantum tunneling effect, thus unable to utilize the high sensitivity of tunneling current to capture subtle changes in mechanical vibration.

[0004] Therefore, there is an urgent need to design a weak sound amplification device that combines biomimetic acoustic structure and quantum tunneling effect to achieve accurate acquisition, physical amplification, accurate mechanical-electrical signal conversion and multi-stage electrical signal amplification of weak sounds at the microscale, while having good sound insulation and anti-interference capabilities, thus solving the technical problems of difficult weak sound acquisition, low amplification accuracy and poor anti-interference capability in the existing technology. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a weak sound amplification device and its usage method, enabling precise acquisition, multi-level amplification, and clear playback of weak sounds at the microscale. This solves the technical problems of difficulty in acquiring weak sounds at the microscale, low amplification accuracy, and poor anti-interference ability in existing technologies, and meets the needs of weak sound acquisition and analysis in fields such as biological research and microenvironment monitoring.

[0006] The objective of this invention is achieved as follows: A weak sound amplification device includes a base, a controller, a power amplifier, and a speaker. The base is equipped with a signal component, a sound component, a sealed housing, and a stage for placing a sample. The controller is electrically connected to the signal component and the sound component via controller connection lines, and is also electrically connected to the power amplifier via a power amplifier connection line. The power amplifier is electrically connected to the speaker via a speaker connection line. The sound component includes a bionic acoustic channel, with a tympanic membrane sealed and fixed at the end of the channel. The tympanic membrane is tightly fitted to the left end of the ossicular chain, which is suspended from a crossbeam. The signal component includes a manual worktable mounted on a base, a precision worktable mounted on the manual worktable, a piezoelectric stack support mounted on the precision worktable, a piezoelectric stack mounted inside the piezoelectric stack support, a front end fixedly connected to a rear end of a probe support, a conductive probe mounted at the front end of the probe support, and a brake fitted around the outer periphery of the probe support; the ossicular chain and the ossicular chain beam are made of conductive material and are electrically connected; the manual worktable, the precision worktable, and the piezoelectric stack are used for three-stage adjustment of the distance between the front end of the conductive probe and the right end of the ossicular chain, so that the two are connected in series with the controller to form a closed quantum tunneling circuit.

[0007] The working principle of this device is as follows: The faint sound of the object to be collected is precisely acquired through the bionic acoustic channel, and then initially amplified through sound reflection and ear canal resonance effect. It is then transmitted to the tympanic membrane and converted into mechanical vibration. The ossicular chain uses the leverage effect to further amplify the mechanical vibration of the tympanic membrane, converting it into its own nanoscale reciprocating mechanical vibration, completing the conversion and physical amplification of the sound signal into microscopic mechanical vibration. The distance between the conductive probe and the ossicular chain is precisely adjusted to the quantum tunneling effect trigger range through three-level adjustment. The two are connected in series with the controller to form a closed quantum tunneling circuit. The nanoscale reciprocating mechanical vibration of the ossicular chain will dynamically change its relative distance with the probe, thereby causing the tunneling current to change synchronously. The high sensitivity of the tunneling current is used to achieve precise conversion of microscopic mechanical vibration into electrical signal, which can effectively capture extremely weak vibration changes. After the controller acquires the tunneling current signal, it first filters, shapes and initially amplifies it, and then transmits the processed electrical signal to the power amplifier for efficient secondary amplification. Finally, the loudspeaker performs precise electro-acoustic conversion on the amplified electrical signal to form audible sound and play it out, completing the full-link amplification of faint sound.

[0008] As a further improvement of the present invention, the bionic acoustic channel is mounted on the base and located next to the stage via an acoustic channel bracket; the ossicular chain beam is mounted on the base and located in front of the signal component via an ossicular chain bracket; and the actuator is mounted on the base via an actuator bracket. Both the ossicular chain bracket and the probe bracket are made of insulating material; the tympanic membrane is a flexible insulating elastic membrane with a thickness of micrometers; the end face of the ossicular chain facing the conductive probe is a nanometer-level smooth plane; and the end of the conductive probe facing the ossicular chain is a nanometer-level needle tip.

[0009] As a further improvement of the present invention, the piezoelectric stack support includes a rectangular base and a flexible hinge structure. The flexible hinge structure includes a rectangular groove arranged axially along the rectangular base and a rectangular through slot arranged radially along the rectangular base. The piezoelectric stack is installed in the rectangular groove and has pre-tightening elastic force at both ends. The front end face of the rectangular base has a mounting hole for accommodating and positioning the end of the probe support.

[0010] As a further improvement of the present invention, the bionic acoustic channel is a curved structure that mimics the outer ear and ear canal of the human body, used to collect weak sounds and achieve preliminary amplification through sound reflection and ear canal resonance effect; the suspension connection point of the ossicular chain and the ossicular chain beam constitutes a fulcrum, and the ossicular chain uses the lever effect to amplify the mechanical vibration of the tympanic membrane and convert it into its own nanoscale reciprocating mechanical vibration.

[0011] As a further improvement of the present invention, the controller has a built-in signal acquisition module, a signal processing and amplification module, and an actuator control module; the signal acquisition module is used to acquire the tunneling current signal in the quantum tunneling circuit; the signal processing and amplification module is used to filter, shape, and amplify the tunneling current signal; the actuator control module is used to control the braking and releasing of the brake, the fine adjustment of the position of the precision worktable, and the nanometer-level precision adjustment of the piezoelectric stack.

[0012] As a further improvement of the present invention, the power amplifier is used to receive the electrical signal transmitted by the controller and amplify and adjust the power of the electrical signal to realize secondary amplification of the electrical signal; the loudspeaker is used to convert the electrical signal amplified by the power amplifier into an electro-acoustic signal to form audible sound and play it to the outside.

[0013] As a further improvement of the present invention, both the manual worktable and the precision worktable are three-dimensional fine-tuning worktables.

[0014] As a further improvement of the present invention, the brake is an electromagnetic friction brake, used to hold the probe bracket to fix the spatial position of the conductive probe.

[0015] As a further improvement of the present invention, the sealing shell includes an outer shell, a middle shell, and an inner shell that are coaxially sleeved and fixed around the base. The outer shell, the middle shell, and the inner shell are all transparent rigid shells, and the three seal each other to form a three-layer sealing structure.

[0016] The present invention also proposes a method of using the above-mentioned weak sound amplification device, comprising the following steps:

[0017] S1: Place the object whose faint sound is to be collected on the stage. After coarsely positioning and adjusting the conductive probe by manually adjusting the worktable, close the sealed shell to achieve complete isolation of external noise.

[0018] S2: First, the conductive probe is precisely positioned and finely adjusted using a precision stage. Then, the conductive probe is adjusted at the nanometer level using a piezoelectric stack to control the distance between the end of the conductive probe and the end of the ossicular chain within the quantum tunneling effect triggering range of 0.01nm~20nm, so as to trigger the quantum tunneling effect.

[0019] S3: Activate the brake to grip the probe bracket, thereby fixing the spatial position of the conductive probes and maintaining a stable spacing between them.

[0020] S4: The object on the stage emits a faint sound, which is collected and initially amplified by the bionic sound channel and then transmitted to the tympanic membrane. The tympanic membrane converts the sound signal into mechanical vibration and transmits the vibration energy to the ossicular chain. The ossicular chain amplifies the vibration amplitude through the lever effect and forms nanoscale reciprocating mechanical vibration.

[0021] S5: The nanoscale reciprocating mechanical vibration of the ossicular chain causes synchronous changes in the tunneling current in the quantum tunneling circuit. The controller acquires the tunneling current signal through the signal acquisition module. After filtering, shaping and amplification by the signal processing and amplification module, the processed electrical signal is transmitted to the power amplifier through the power amplifier connection line.

[0022] S6: The power amplifier amplifies and adjusts the gain of the received electrical signal, and then transmits the amplified electrical signal to the speaker through the speaker connection cable. The speaker then performs electro-acoustic conversion and plays the amplified audible sound.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] (1) By combining the physical amplification of biomimetic acoustic structures with the high sensitivity of quantum tunneling effect, nanoscale mechanical vibrations can be accurately captured, achieving ultra-high precision acquisition of extremely weak sounds, and possessing high acquisition accuracy.

[0025] (2) It adopts a three-stage amplification mode of biomimetic physical amplification, controller preliminary electrical signal amplification and power amplifier secondary electrical signal amplification. It has high amplification efficiency and adjustable gain, and can stably convert micro-scale weak sound into audible sound, with excellent amplification effect.

[0026] (3) The three-layer transparent hard-sealed shell is coaxially fitted and sealed, which can effectively isolate external environmental noise interference, avoid signal pollution during the acquisition process, ensure the high purity of the acquired signal, and has strong anti-interference ability.

[0027] (4) The three-level spacing adjustment method, which combines manual coarse adjustment, fine adjustment and piezoelectric stack nanometer-level ultra-precision adjustment, can achieve nanometer-level precise adjustment from 0.01nm to 20nm. The electromagnetic friction brake can achieve stable locking of the probe position, ensuring the working stability and repeatability of the device, and has the advantage of precise and controllable adjustment.

[0028] (5) It is designed for the weak sound collection and analysis of small organisms such as ants and small insects. It can meet the needs of microscale weak sound collection in fields such as biological research and microenvironment monitoring. The structure and performance of the device are highly matched with the application scenarios. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the weak sound amplification device in this invention.

[0031] Figure 2 This is a three-dimensional structural diagram of the sound component in this invention.

[0032] Figure 3 This is a three-dimensional structural diagram of the signal component in this invention.

[0033] Figure 4 This is a three-dimensional structural diagram of the ossicular chain in this invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the piezoelectric stack support in this invention.

[0035] Figure 6 This is a three-dimensional structural diagram of the base in this invention.

[0036] Figure 7 This is a connection block diagram of the controller in this invention.

[0037] The components include: 1. Base; 101. Limiting step; 102. Cable channel; 2. Controller; 3. Power amplifier; 4. Speaker; 5. Signal components; 501. Manual worktable; 502. Precision worktable; 503. Piezoelectric stack support; 503a. Rectangular base; 503b. Rectangular groove; 503c. Rectangular through slot; 503d. Mounting hole; 504. Piezoelectric stack; 505. Probe support; 506. Conductive probe; 507. Actuator; 508. Actuator support; 6. Sound components; 601. Bionic human external ear; 602. Ear canal; 603. Channel support; 604. Tympanic membrane; 605. Ossicular chain; 605a. Recess; 605b. Inclined structure; 607. Ossicular chain beam; 608. Ossicular chain support; 7. Sealed shell; 8. Stage; 9. Controller connection cable; 10. Power amplifier connection cable; 11. Speaker connection cable. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1

[0040] like Figure 1 The device shown includes a weak sound amplification device, comprising a base 1, a controller 2, a power amplifier 3, and a speaker 4. The base 1 is provided with a signal component 5, a sound component 6, a sealed housing 7, and a stage 8 for placing a sample. The controller 2 is electrically connected to the signal component 5 and the sound component 6 respectively via a controller connection line 9. The controller 2 is electrically connected to the power amplifier 3 via a power amplifier connection line 10. The power amplifier 3 is electrically connected to the speaker 4 via a speaker connection line 11.

[0041] like Figure 2 As shown, the sound component 6 includes a bionic sound channel arranged towards the stage 8. The bionic sound channel is a curved structure that mimics the outer ear 601 and ear canal 602 of a bionic human ear. It is made of a material with good acoustic properties and is fixed on the sound channel support 603. It is used to collect weak sounds and achieve preliminary amplification through sound reflection and the resonance effect of the ear canal 602. A tympanic membrane 604 is sealed and fixed at the end of the bionic sound channel. The tympanic membrane 604 is a flexible insulating elastic membrane with a thickness of micrometers. It is tightly sealed and fixed at the end of the bionic sound channel and is used to efficiently convert sound wave vibrations into mechanical vibrations. The tympanic membrane 604 is closely attached to the left end of the ossicular chain 605. The ossicular chain 605 is connected to the ossicular chain beam 607 by hinge or suspension. The ossicular chain beam 607 is fixed on the ossicular chain support 608, forming a lever system.

[0042] like Figure 3 As shown, the signal component 5 includes a manual worktable 501 fixed on the base 1, a precision worktable 502 fixed on the movable surface of the manual worktable 501, a piezoelectric stack support 503 fixed on the movable surface of the precision worktable 502, a piezoelectric stack 504 disposed inside the piezoelectric stack support 503, and the front end of the piezoelectric stack support 503 fixedly connected to the rear end of the probe support 505; a conductive probe 506 is coaxially fixed at the front end of the probe support 505, and a brake 507 is sleeved on the outer periphery of the probe support 505, and the brake 507 is fixed on the brake support 508; the tip of the conductive probe 506 is a nanometer-sharp conductive needle tip.

[0043] The ossicular chain 605 and the ossicular chain beam 607 are made of conductive materials and are electrically connected. The suspension connection point between the ossicular chain 605 and the ossicular chain beam 607 is both a mechanical fulcrum and an electrical connection point. The ossicular chain 605 uses the leverage effect to amplify the mechanical vibration of the tympanic membrane 604 and convert it into its own nanoscale reciprocating mechanical vibration. The manual worktable 501, the precision worktable 502, and the piezoelectric stack 504 are used to adjust the distance between the front end of the conductive probe 506 and the right end of the ossicular chain 605 in three stages, so that the two are connected in series with the controller 2 to form a closed quantum tunneling circuit.

[0044] The ossicular chain support 608, the brake support 508, and the probe support 505 are all made of highly insulating electrical insulation material and are fixedly connected to the upper side of the base 1 as one piece.

[0045] like Figure 4 As shown, the outer side of the short arm end of the ossicular chain 605 is machined with a frustum-shaped recess 605a. This recess 605a can conform to the curve of the tympanic membrane 604 on the one hand, and on the other hand, it can reduce weight and adjust the mass distribution, optimize the resonant frequency of the ossicular chain 605, and make its center of gravity closer to the fulcrum, thereby improving its response sensitivity to weak driving forces while ensuring sufficient rigidity. The long arm end of the ossicular chain 605 is a beveled structure 605b, and the surface finish of the bevel needs to reach the nanometer level.

[0046] Both the manual stage 501 and the precision stage 502 are three-dimensional micro-adjustment stages. The manual stage 501 typically refers to a mechanical displacement stage with a manual differential head or micrometer screw mechanism along the X, Y, and Z axes, used for initial coarse positioning at the centimeter to millimeter level. The precision stage 502 typically refers to an electric displacement stage driven by a piezoelectric ceramic motor, servo motor, or lead screw, capable of precise positioning at the millimeter to micrometer level. These multi-dimensional precision displacement stages are standard and universal equipment in the fields of precision mechanics, optical debugging, and micro-manipulation. They are readily available in the market with numerous models, and their working principle (platform translation via mechanical transmission or motor drive) and basic structure are already existing technologies. In this invention, their function is to provide preliminary, wide-range spatial position adjustment for the conductive probe 506.

[0047] like Figure 5 As shown, the piezoelectric stack support 503 includes a rectangular base 503a and a flexible hinge structure. The flexible hinge structure includes a rectangular groove 503b arranged axially along the rectangular base 503a and a rectangular through groove 503c arranged radially along the rectangular base 503a. The piezoelectric stack 504 is installed in the rectangular groove 503b and has pre-tightened elastic force at both ends. Specifically, the rectangular groove 503b and the rectangular through groove 503c, which are perpendicular to each other, are machined on the rectangular base 503a, so that the thickness of the material area surrounding the two grooves is reduced, thereby forming an elastic deformation zone with predetermined flexibility. The piezoelectric stack 504 includes a plurality of piezoelectric ceramic sheets arranged axially along the rectangular base 503a and installed and pre-tightened in the rectangular groove 503b. When a driving voltage is applied to the piezoelectric stack 504, the resulting minute axial elongation or contraction force acts on the sidewall of the rectangular groove 503b (i.e., the side where the mounting hole 503d is located), thereby forcing the flexible hinge area to produce controllable, extremely small elastic bending deformation. This deformation is transmitted and amplified into nanometer-level displacement of the probe holder 505 and the conductive probe 506 mounted thereon in the axial direction of the rectangular base 503a, ultimately achieving nanometer-level precision adjustment of the tunneling gap between the tip of the conductive probe 506 and the ossicular chain 605. The shape, size, and position of the rectangular groove 503b and the rectangular through slot 503c are precisely designed to ensure that the flexible hinge provides the required degree of freedom of movement in the desired direction while having extremely high stiffness in other directions, thereby ensuring the accuracy and stability of the adjustment; the front end face of the rectangular base 503a has a mounting hole 503d for accommodating and positioning the end of the probe holder 505.

[0048] like Figure 7As shown, controller 2 is the core control unit of this device, responsible for controlling the working status of all electrical parts of the device and acquiring and processing tunneling current signals. Specifically, it includes: a signal acquisition module, a signal processing and amplification module, and an actuator control module. The signal acquisition module is used to acquire the tunneling current signal in the quantum tunneling circuit. In this embodiment, it is implemented through a high-precision analog-to-digital converter to convert the tiny tunneling current into a digital signal. This type of circuit design for weak current detection is a mature existing technology in electronic measurement technology. The signal processing and amplification module is used to filter, shape, and amplify the tunneling current signal. In this embodiment, it is implemented through an active filter composed of operational amplifiers, resistors, and capacitors, and a lock-in amplifier. These signal conditioning techniques are basic existing technologies in the fields of electronic engineering and instrumentation. The actuator control module is used to control the operation of the brake 507 (brake / release), the precision worktable 502 (position fine adjustment), and the piezoelectric stack 504 (nanometer-level displacement). In this embodiment, this function is implemented by a microcontroller. The microcontroller controls the aforementioned actuators via its digital output interface, analog output interface, and pulse modulation signals, through corresponding drive circuits (such as relay drivers, motor drivers, and high-voltage piezoelectric amplifiers). This scheme of using a microcontroller in conjunction with peripheral drive circuits to manage mechanical and piezoelectric actuators is a standard existing technology in the fields of automation and precision motion control, and will not be elaborated upon further here.

[0049] The power amplifier 3 is used to receive the electrical signal transmitted by the controller 2 and amplify and adjust the power of the electrical signal to achieve secondary amplification of the electrical signal, which falls within the functional scope of a standard audio power amplifier; the speaker 4 is used to convert the electrical signal amplified by the power amplifier 3 into an electro-acoustic signal to form audible sound and play it to the outside.

[0050] Brake 507 is an electromagnetic friction brake used to hold probe bracket 505 to fix the spatial position of conductive probe 506. Its working principle is as follows: when the conductive probe 506 is positioned correctly, microcontroller 2 controls the coil to be energized. The energized coil generates a magnetic field, which pushes the friction plate, gripping the braked probe bracket 505 through frictional force to prevent displacement due to external micro-vibrations and ensure the stability of the tunneling gap. After de-energization, it is released by spring force. This electromagnetic brake is a conventional and universal component used in mechanical transmission systems for position locking, widely used in machine tools, robots, and other applications requiring emergency stopping or position holding. It is a component of existing technology.

[0051] The sealed housing 7 includes an outer shell, a middle shell, and an inner shell coaxially fitted and fixed around the base 1. All three shells are transparent rigid shells. Acoustic sealing is achieved between the layers and between the outer shell and the base 1 via sealing strips, forming multiple sound barriers to maximize the isolation of external environmental noise. The base 1 also has three limiting steps 101 around its perimeter for engaging with the sealed housing 7. These steps contain cable channels 102 that allow connecting wires to pass through. Figure 6 As shown.

[0052] The specific working process of this device is as follows: Three layers of transparent rigid shells are coaxially fitted and sealed to the limiting step 101 to achieve complete isolation from external sounds. When small organisms such as ants are active on the stage 8 and emit faint sounds, the bionic sound channel in the sound component 6 simulates the curved structure of the outer ear and ear canal 602 of the human body, and is responsible for accurately collecting the sound. Through the sound reflection of the outer ear and the resonance amplification of the ear canal 602, the sound is initially amplified. The tympanic membrane 604 simulates the tympanic membrane 604 in the middle ear of the human body, and is responsible for converting the amplified sound signal into mechanical vibration and transmitting the vibration energy to the ossicular chain 605. The ossicular chain 605 converts the mechanical vibration of the left tympanic membrane 604 into the reciprocating vibration of its own right end smooth surface, and further amplifies the vibration amplitude of the tympanic membrane 604 through the leverage effect, forming nanoscale reciprocating mechanical vibration. This vibration dynamically changes the relative distance between the end of the conductive probe 506 and the right end of the ossicular chain 605, thereby causing the tunneling current in the quantum tunneling circuit to change synchronously. After the controller 2 acquires the tunneling current signal through the built-in signal acquisition module, it performs filtering, shaping and preliminary amplification processing through the signal processing and amplification module. The processed electrical signal is then transmitted to the power amplifier 3, which amplifies the power and adjusts the gain of the electrical signal to achieve secondary high-efficiency amplification. Finally, the electrical signal is converted into audible sound through the speaker 4 and played to the outside, completing the whole-link acquisition and amplification of weak sound.

[0053] Example 2

[0054] The present invention also proposes a method of using a weak sound amplification device, comprising the following steps:

[0055] S1. Sample placement and sealing: Place the object to be collected for weak sound on the stage 8. After coarsely positioning and initially adjusting the conductive probe 506 through the manual worktable 501, close the sealing shell 7 to achieve complete isolation of external noise.

[0056] S2. Nanoscale spacing adjustment: First, the conductive probe 506 is precisely positioned and finely adjusted by the precision stage 502. Then, the conductive probe 506 is adjusted at the nanoscale ultra-precision level by the piezoelectric stack 504 so that the spacing between the end of the conductive probe 506 and the end of the ossicular chain 605 is controlled within the quantum tunneling effect triggering range of 0.01nm~20nm, so as to trigger the quantum tunneling effect.

[0057] S3. Probe position locking: Activate brake 507 to grip probe bracket 505, thereby fixing the spatial position of conductive probe 506 and maintaining its spacing.

[0058] S4. Sound-mechanical vibration conversion: The object on stage 8 emits a faint sound, which is collected and initially amplified by the bionic sound channel and then transmitted to the tympanic membrane 604. The tympanic membrane 604 converts the sound signal into mechanical vibration and transmits the vibration energy to the ossicular chain 605. The ossicular chain 605 amplifies the vibration amplitude through the lever effect and forms nanoscale reciprocating mechanical vibration.

[0059] S5. Mechanical vibration-electrical signal conversion and preliminary amplification: The nanoscale reciprocating mechanical vibration of the ossicular chain 605 causes the tunneling current in the quantum tunneling circuit to change synchronously. The controller 2 acquires the tunneling current signal through the signal acquisition module. After filtering, shaping and amplification by the signal processing and amplification module, the processed electrical signal is transmitted to the power amplifier 3 through the power amplifier connection line 10.

[0060] S6. Secondary amplification of electrical signal and electro-acoustic conversion playback: After the power amplifier 3 amplifies and adjusts the gain of the received electrical signal, it transmits the secondary amplified electrical signal to the speaker 4 through the speaker connection line 11. The speaker 4 then performs electro-acoustic conversion and plays the amplified audible sound.

[0061] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A weak sound amplification device, comprising a base, a controller, a power amplifier, and a speaker, characterized in that, The base is equipped with a signal component, a sound component, a sealed housing, and a stage for placing samples. The controller is electrically connected to both the signal and sound components via a controller connection cable, and to a power amplifier via a power amplifier connection cable. The power amplifier is electrically connected to a speaker via a speaker connection cable. The sound component includes a bionic acoustic channel, with a tympanic membrane sealed and fixed at its end. The tympanic membrane is tightly fitted to the left end of the ossicular chain, which is suspended from the ossicular chain beam. The signal component includes a manual worktable mounted on the base. The manual workbench is equipped with a precision workbench, and the precision workbench is equipped with a piezoelectric stack support. The piezoelectric stack is installed inside the piezoelectric stack support. The front end of the piezoelectric stack support is fixedly connected to the rear end of the probe support. A conductive probe is installed at the front end of the probe support, and a brake is sleeved on the outer periphery of the probe support. The ossicular chain and the ossicular chain beam are made of conductive material and are electrically connected. The manual workbench, the precision workbench, and the piezoelectric stack are used for three-level adjustment of the distance between the front end of the conductive probe and the right end of the ossicular chain, so that the two are connected in series with the controller to form a closed quantum tunneling circuit.

2. The weak sound amplification device according to claim 1, characterized in that, The bionic sound channel is mounted on the base via a sound channel bracket and is located next to the stage. The ossicular chain beam is mounted on the base via an ossicular chain bracket and is located in front of the signal component. The actuator is mounted on the base via an actuator bracket. Both the ossicular chain bracket and the probe bracket are made of insulating material. The tympanic membrane is a flexible insulating elastic membrane with a thickness of micrometers. The end face of the ossicular chain facing the conductive probe is a nanometer-level smooth plane, and the end of the conductive probe facing the ossicular chain is a nanometer-level needle tip.

3. The weak sound amplification device according to claim 1, characterized in that, The piezoelectric stack support includes a rectangular base and a flexible hinge structure. The flexible hinge structure includes a rectangular groove arranged along the axial direction of the rectangular base and a rectangular through groove arranged along the radial direction of the rectangular base. The piezoelectric stack is installed in the rectangular groove and has pre-tightening elastic force at both ends. The front end face of the rectangular base has a mounting hole for accommodating and positioning the end of the probe support.

4. A weak sound amplification device according to claim 1, characterized in that, The bionic sound channel is a curved structure that mimics the outer ear and ear canal of the human body. It is used to collect weak sounds and achieve preliminary amplification through sound reflection and ear canal resonance. The suspension connection point of the ossicular chain and the ossicular chain beam forms a fulcrum. The ossicular chain uses the lever effect to amplify the mechanical vibration of the tympanic membrane and convert it into its own nanoscale reciprocating mechanical vibration.

5. A weak sound amplification device according to claim 1, characterized in that, The controller has a built-in signal acquisition module, a signal processing and amplification module, and an actuator control module. The signal acquisition module is used to acquire the tunneling current signal in the quantum tunneling circuit. The signal processing and amplification module is used to filter, shape, and amplify the tunneling current signal. The actuator control module is used to control the braking and releasing of the brake, the fine-tuning of the position of the precision worktable, and the nanometer-level precision adjustment of the piezoelectric stack.

6. A weak sound amplification device according to claim 1, characterized in that, The power amplifier is used to receive the electrical signal transmitted by the controller and amplify and adjust the power of the electrical signal to achieve secondary amplification of the electrical signal; the loudspeaker is used to convert the electrical signal amplified by the power amplifier into an audible sound and play it to the outside.

7. A weak sound amplification device according to claim 1, characterized in that, Both the manual worktable and the precision worktable are three-dimensional fine-tuning worktables.

8. A weak sound amplification device according to claim 1, characterized in that, The brake is an electromagnetic friction brake, used to grip the probe bracket to fix the spatial position of the conductive probe.

9. A weak sound amplification device according to claim 1, characterized in that, The sealed outer shell includes an outer shell, a middle shell, and an inner shell that are coaxially sleeved and fixed around the base. The outer shell, the middle shell, and the inner shell are all transparent rigid shells, and the three seal each other to form a three-layer sealing structure.

10. A method of using the weak sound amplification device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: Place the object whose faint sound is to be collected on the stage. After coarsely positioning and adjusting the conductive probe by manually adjusting the worktable, close the sealed shell to achieve complete isolation of external noise. S2: First, the conductive probe is precisely positioned and finely adjusted using a precision stage. Then, the conductive probe is adjusted at the nanometer level using a piezoelectric stack to control the distance between the end of the conductive probe and the end of the ossicular chain within the quantum tunneling effect triggering range of 0.01nm~20nm, so as to trigger the quantum tunneling effect. S3: Activate the brake to grip the probe bracket, thereby fixing the spatial position of the conductive probes and maintaining a stable spacing between them. S4: The object on the stage emits a faint sound, which is collected and initially amplified by the bionic sound channel and then transmitted to the tympanic membrane. The tympanic membrane converts the sound signal into mechanical vibration and transmits the vibration energy to the ossicular chain. The ossicular chain amplifies the vibration amplitude through the lever effect and forms nanoscale reciprocating mechanical vibration. S5: The nanoscale reciprocating mechanical vibration of the ossicular chain causes synchronous changes in the tunneling current in the quantum tunneling circuit. The controller acquires the tunneling current signal through the signal acquisition module. After filtering, shaping and amplification by the signal processing and amplification module, the processed electrical signal is transmitted to the power amplifier through the power amplifier connection line. S6: The power amplifier amplifies and adjusts the gain of the received electrical signal, and then transmits the amplified electrical signal to the speaker through the speaker connection cable. The speaker then performs electro-acoustic conversion and plays the amplified audible sound.

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