A bone conduction earphone for an audiometer

Abstract

The utility model relates to the technical fields of earphone equipment, specifically relates to a hearing meter bone conduction earphone, including connecting wire and respectively being located in earphone main part of connecting wire both ends, earphone main part includes weight part, wearing part and sound production part that connect gradually, be equipped with control circuit in weight part, be equipped with opposite arrangement's mounting portion and vibration piece in sound production part, mounting portion with vibration piece between by middle part outward side are equipped with first magnet, sonar and second magnet gradually, first magnet with second magnet's same end all are solid to be equipped in mounting portion, the other end of sonar is connected with vibration piece, the inner layer and the outer layer of sonar are equipped with first coil and second coil with control circuit electricity is connected respectively, control circuit is used for making first coil conduction or first coil with second coil simultaneous conduction. The utility model's earphone can use more big decibel range, is applicable to more test environment.

Description

Technical Field

[0001] This utility model relates to the technical field of headphone devices, specifically to a bone conduction headphone for an audiometer. Background Technology

[0002] An audiometer is an instrument used to measure an individual's sensitivity to various frequencies. Most existing audiometers use in-ear headphones. However, in clinical audiology, to differentiate between conductive and sensorineural hearing loss—that is, between lesions of the outer or middle ear and those of the inner ear or nerves—bone conduction headphones are typically used for further testing. These bone conduction headphones generally employ electromagnetic bone conduction oscillators, using an electromagnetic coil to convert electrical signals into mechanical vibrations that drive a metal vibrating plate, thereby transmitting sound signals through the skull to the inner ear. However, existing headphones use relatively fixed coil wire diameters and turns. Even with dual coils, the sensitivity of electromagnetic induction is increased through series connection, which may even increase the coil resistance, leading to increased impedance and reduced power. This results in sound intensity that cannot meet the requirements of diving, aviation, and other specialized applications. Hearing tests for these specific uses require additional specialized headphones; in practical applications, a single pair of headphones cannot be used for quick testing. Utility Model Content

[0003] To address the problems existing in the prior art, the present invention aims to provide a bone conduction earphone for an audiometer. This earphone features a wider decibel adjustment range, capable of withstanding high-intensity sound pressure tests while accurately capturing the low-frequency response of weak signals, thus meeting the noise analysis needs in complex environments.

[0004] The present invention discloses a bone conduction earphone for an audiometer, comprising a connecting wire and earphone bodies respectively disposed at both ends of the connecting wire. The earphone body includes a counterweight, a wearing part, and a sound-emitting part connected in sequence. The counterweight contains a control circuit, and the sound-emitting part contains a mounting part and a vibrating plate arranged opposite to each other. A first magnet, an oscillator, and a second magnet are arranged in sequence from the middle to the outside between the mounting part and the vibrating plate. The same end of the first magnet and the second magnet are fixed to the mounting part. The other end of the oscillator is connected to the vibrating plate. The inner and outer layers of the oscillator are respectively provided with a first coil and a second coil electrically connected to the control circuit. The control circuit is used to turn on the first coil or turn on the first coil and the second coil simultaneously.

[0005] In one embodiment, the number of turns of the first coil is less than the number of turns of the second coil, and the wire diameter of the first coil is greater than the wire diameter of the second coil.

[0006] In one embodiment, a selection switch is also provided at the counterweight part, and the power supply of the control circuit is connected in series with the first coil, the selection switch and the second coil in sequence, and another path of the selection switch is also connected to the power supply of the control circuit through a resistor.

[0007] In one embodiment, the resistance of the first coil is 3-5 ohms, the resistance of the second coil is 8-10 ohms, and the resistance of the resistor is less than the resistance of the second coil.

[0008] In one embodiment, both the oscillator and the mounting portion are made of insulating material.

[0009] In one embodiment, the two earphone bodies are respectively plugged into the two ends of the connecting cable via an interface, and the connecting cable electrically connects the two control circuits.

[0010] In one embodiment, the wearing part is curved and adapted to fit the ear, and the wearing part is used to hang the headphone body on the ear.

[0011] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0012] The earphone of this invention has a wider decibel range adjustment capability. By using different coil conduction modes, it can reduce the impedance of converting electrical signals into vibrational sound signals to withstand high-intensity sound pressure tests. It can also be adjusted by both coils to accurately capture the low-frequency response of weak signals. This freely adjustable wide dynamic range design makes it suitable for diverse acoustic testing scenarios such as anechoic chambers, industrial sites, and vehicle systems, while meeting the noise analysis needs in complex environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a bone conduction earphone for an audiometer according to this utility model;

[0014] Figure 2 This is an enlarged schematic diagram of the structure of the voice coil inside the sound-generating part of this utility model;

[0015] Figure 3 This is a circuit connection diagram of one of the headphone bodies of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1-connecting wire, 2-earphone body, 21-counterweight, 22-wearing part, 23-sound-producing part, 231-mounting part, 232-vibrating plate, 233-first magnet, 234-vibrator, 235-second magnet, 236-first coil, 237-second coil, 238-selection switch, 239-resistor. Detailed Implementation

[0017] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can be described as the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-3 As shown, the present invention discloses a bone conduction earphone for an audiometer, comprising a connecting wire 1 and earphone bodies 2 respectively disposed at both ends of the connecting wire 1. The earphone body 2 includes a counterweight 21, a wearing part 22, and a sound-emitting part 23 connected in sequence. The counterweight 21 is provided with a control circuit. The sound-emitting part 23 is provided with a mounting part 231 and a vibrating plate 232 arranged opposite to each other. Between the mounting part 231 and the vibrating plate 232, a first magnet 233, an oscillator 234, and a second magnet 235 are arranged in sequence from the middle to the outside. The same end of the first magnet 233 and the second magnet 235 are fixed on the mounting part 231. The other end of the oscillator 234 is connected to the vibrating plate 232. The inner and outer layers of the oscillator 234 are respectively provided with a first coil 236 and a second coil 237 electrically connected to the control circuit. The control circuit is used to turn on the first coil 236 or turn on the first coil 236 and the second coil 237 simultaneously. The earphone of this invention has a wider decibel range adjustment capability. By using different coil conduction modes, it can reduce the impedance of the sound-emitting part 23 from converting electrical signals into vibrational sound signals by only using the conduction of the first coil 236, so as to withstand high-intensity sound pressure tests. Alternatively, it can achieve dual-coil joint adjustment by simultaneously conducting the first coil 236 and the second coil 237, accurately capturing the low-frequency response of weak signals. This freely adjustable wide dynamic range design makes it suitable for diverse acoustic testing scenarios such as anechoic chambers, industrial sites, and vehicle systems, while meeting the noise analysis needs in complex environments.

[0020] Furthermore, the number of turns in the first coil 236 is less than that in the second coil 237, and the wire diameter of the first coil 236 is greater than that of the second coil 237. The smaller number of turns and wire diameter of the first coil 236 result in a relatively lower resistance. Under the same voltage, using only the first coil 236 yields higher power, enabling the transmission of sound intensity exceeding 90dB. This makes the headphones suitable for specialized hearing tests such as those for diving and aviation. When the first coil 236 and the second coil 237 are connected in series, a dual-coil mode is formed. Although this increases the resistance and reduces power, it is more sensitive to low-frequency signals and suitable for ordinary low-intensity hearing tests. A selection switch 238 is also provided at the counterweight 21. The power supply of the control circuit is connected in series with the first coil 236, the selection switch 238, and the second coil 237. The other path of the selection switch 238 is also connected to the power supply of the control circuit through a resistor 239. Users can adjust the conduction of the first coil 236 or the simultaneous conduction of the first coil 236 and the second coil 237 by selecting switch 238, thereby selecting different methods for audiometer testing.

[0021] In one embodiment, such as Figure 3 As shown, the resistance of the first coil 236 is set to 4 ohms, and the resistance of the second coil 237 is set to 8 ohms. The resistance of resistor 239 is less than that of the second coil 237 to protect the first coil 236 from voltage surges. Existing low-impedance headphones, due to coil resistance and other settings, typically have an inductance of 75nH, limiting the maximum sound intensity to 85dB. This headphone, however, can use only the first coil 236 in special cases, reducing the inductance to 60nH and thus increasing the sound intensity range to 105dB. In normal situations, using both the first coil 236 and the second coil 237 provides a sound intensity of up to 70dB, sufficient for everyday use. In addition, both the oscillator 234 and the mounting part 231 are made of insulating material. In particular, the oscillator 234 needs to isolate the two coils to avoid short circuits. The first coil 236 mainly generates electromagnetic induction with the inner first magnet 233. When the two coils work synchronously, the first coil 236 and the second coil 237 are simultaneously subjected to the electromagnetic induction of the first magnet 233 and the second magnet 235.

[0022] In addition, the two earphone bodies 2 are respectively connected to both ends of the connecting cable 1 via an interface, and the connecting cable 1 electrically connects the two control circuits. The connecting cable 1 is detachably connected to the two earphone bodies 2. The earphone body 2 itself is curved and adapted to the ear because the wearing part 22 is fitted to the ear, and can be hung on the ear only through the wearing part 22. In order to ensure that the two earphone bodies 2 can fit more stably against the skull when used at the same time, the connecting cable 1 can be plugged in to connect the two earphone bodies 2 into one unit, and the two control circuits can be electrically connected through the interface, so that the sound test can be performed synchronously.

[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application.

[0024] The positional relationships described in the figures are for illustrative purposes only and should not be construed as limiting this patent. Clearly, the above embodiments of this utility model are merely examples to clearly illustrate the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A bone conduction earphone for an audiometer, comprising a connecting wire (1) and earphone bodies (2) respectively disposed at both ends of the connecting wire (1), the earphone body (2) comprising a counterweight (21), a wearing part (22), and a sound-emitting part (23) connected in sequence, wherein the counterweight (21) is provided with a control circuit, characterized in that, The sound-generating part (23) is provided with a mounting part (231) and a vibrating plate (232) arranged opposite to each other. Between the mounting part (231) and the vibrating plate (232), a first magnet (233), an oscillator (234) and a second magnet (235) are arranged sequentially from the middle to the outside. The same end of the first magnet (233) and the second magnet (235) are fixed on the mounting part (231). The other end of the oscillator (234) is connected to the vibrating plate (232). The inner layer and the outer layer of the oscillator (234) are respectively provided with a first coil (236) and a second coil (237) electrically connected to the control circuit. The control circuit is used to turn on the first coil (236) or turn on the first coil (236) and the second coil (237) simultaneously.

2. The audiometer bone conduction earphone according to claim 1, characterized in that, The number of turns of the first coil (236) is less than the number of turns of the second coil (237), and the wire diameter of the first coil (236) is greater than the wire diameter of the second coil (237).

3. The audiometer bone conduction earphone according to claim 2, characterized in that, The counterweight (21) is also provided with a selection switch (238). The power supply of the control circuit is connected in series with the first coil (236), the selection switch (238) and the second coil (237). The other path of the selection switch (238) is also connected to the power supply of the control circuit through a resistor (239).

4. The audiometer bone conduction earphone according to claim 3, characterized in that, The resistance of the first coil (236) is 3-5 ohms, the resistance of the second coil (237) is 8-10 ohms, and the resistance of the resistor (239) is less than the resistance of the second coil (237).

5. The audiometer bone conduction earphone according to claim 4, characterized in that, Both the vibrator (234) and the mounting part (231) are made of insulating material.

6. The audiometer bone conduction earphone according to claim 5, characterized in that, The two earphone bodies (2) are respectively connected to the two ends of the connecting line (1) through the interface, and the connecting line (1) electrically connects the two control circuits.

7. The audiometer bone conduction earphone according to any one of claims 1-6, characterized in that, The wearing part (22) is curved and adapted to fit the ear, and the wearing part (22) is used to hang the headphone body (2) on the ear.

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