TWI605721B - In-ear headset module - Google Patents

Description

Ear canal earphone microphone module

The invention relates to an ear canal earphone microphone module, and in particular to a ear canal earphone microphone module which can passively resist noise.

With the continuous advancement of technology, personal electronic products are all moving towards the trend of light and miniaturization. Smart phones, tablets or notebook computers are indispensable for people's daily lives. Regardless of the above-mentioned electronic products, in order to allow users to listen to the sound information provided by electronic products without disturbing others, the earphone has become an essential accessory for electronic products. The earphones provide a better sound transmission for the listener, allowing the listener to clearly hear and understand the sound content, unlike the transmission of sound in the air, which can cause unclear conditions, especially during movement of the user, such as during exercise, It will not be affected by driving, intense activities or noisy environments. In addition, in order to be able to use electronic products for talking, a microphone with a microphone is also a common accessory.

In order to balance both the listening sound and the collecting sound, the conventional earphone microphone is designed to separate the earphone from the microphone, and the two are connected to each other by a signal line or a simple mechanism. In this way, the earphones can be placed close to the ear and the microphone can be placed close to the mouth. However, such a design makes the microphone also generate environmental noise, which greatly affects the clarity of the user's voice. To use active noise immunity, an anti-noise circuit is required to cause an increase in cost, and active noise suppression also destroys the fidelity of the collected sound. In addition, in order to reduce the size of the earphone microphone, another conventional earphone microphone uses Bluetooth communication, and the earphone and the microphone are disposed in the same casing. However, the microphone of this design is still designed at the end closest to the mouth, and because the distance between the microphone and the mouth becomes far, it is necessary to use a relatively high-priced directional microphone for radio reception.

The invention provides an ear canal earphone microphone module, which can solve the problem that the microphone has poor sound collection effect and high anti-noise cost in the prior art.

The ear canal earphone microphone module of the present invention comprises a casing, a speaker unit, an ear pad and a microphone. The housing has a chamber and a sound outlet that are connected. The ear pad is disposed on the outer periphery of the housing. The speaker unit and the microphone are disposed in the chamber, and the microphone is located between the sound outlet and the speaker unit. The diameter of the microphone is less than or equal to 6 mm.

In an embodiment of the invention, the horn unit separates the chamber into a front chamber and a rear chamber that are not ventilated, and the microphone is located in the front chamber.

In an embodiment of the invention, the ear canal earphone microphone module further includes a gas permeable moisture-proof component disposed at the sound outlet.

In an embodiment of the invention, the sound receiving hole of the microphone is provided with a gas permeable moisture barrier element.

In an embodiment of the invention, the ear canal earphone microphone module further includes an ear pad disposed outside the sound outlet of the housing and forming a passage connecting the sound outlet. The size of the passage is fixed or enlarged from the side close to the sound outlet to the side away from the sound outlet.

In an embodiment of the invention, the microphone is a condenser microphone.

In an embodiment of the invention, the microphone and the chamber wall of the chamber have a passage for the sound provided by the horn unit to be transmitted out of the sound port via the passage.

In an embodiment of the invention, the ear canal earphone microphone module further comprises a Bluetooth communication unit electrically connected to the speaker unit and the microphone. This Bluetooth communication unit has an echo cancelling circuit.

In an embodiment of the invention, the ear canal earphone microphone module further comprises a Bluetooth communication unit, and the speaker unit and the microphone are electrically connected. The Bluetooth communication unit has a microphone high-pass filter circuit whose cut-off frequency is greater than or equal to 300 Hz.

In an embodiment of the invention, the ear canal earphone microphone module further comprises a Bluetooth communication unit, and the speaker unit and the microphone are electrically connected. The Bluetooth communication unit has a microphone high-pass filter circuit with a slope greater than or equal to 3 dB/octave.

In an embodiment of the invention, the housing is integrally formed and the maximum outer diameter of the housing is less than or equal to 8 mm.

In an embodiment of the invention, the diameter of the horn unit is less than or equal to 6 mm.

In an embodiment of the invention, the sound port of the microphone is facing the sound outlet.

In an embodiment of the invention, the ear canal earphone microphone module further includes a printed circuit board. The printed circuit board card is placed in the chamber. The microphone is soldered to the printed circuit board. There is a passage between the printed circuit board and the cavity wall of the chamber for the sound provided by the speaker unit to be transmitted out of the sound port via the channel.

In an embodiment of the invention, the ear canal earphone microphone module further includes a microphone lead. The chamber wall has a slot on the wall. The microphone lead is electrically connected to the microphone and extends to the outside through a wire slot.

Based on the above, in the ear canal earphone microphone module of the present invention, the speaker unit and the ear pad together provide a closed noise canceling function. Therefore, the ear canal earphone microphone module of the present invention can isolate ambient noise and achieve better sound collection effect.

The above described features and advantages of the invention will be apparent from the following description.

1 is a partial cross-sectional view of an ear canal earphone microphone module in accordance with an embodiment of the present invention. Referring to FIG. 1 , the ear canal earphone microphone module 100 of the present embodiment includes a housing 110 , an ear pad 150 , a speaker unit 120 , and a microphone 130 . The housing 110 has a chamber C10 and a sound outlet P10. The chamber C10 is in communication with the sound outlet P10. The ear pad 150 is disposed outside the housing 110. Both the speaker unit 120 and the microphone 130 are disposed in the chamber C10, and the microphone 130 is located between the sound outlet P10 and the speaker unit 120. The diameter of the microphone 130 is less than or equal to 6 mm so that the microphone 130 can penetrate the ear canal of the user together with the housing 110 to approach the eardrum. The reason why the ear canal microphone speaker module 100 of the present embodiment is called the ear canal type is that a part of the volume of the microphone speaker module 100 can be placed into the ear canal from the auricle, and the end of the ear canal is the eardrum. The average diameter of the ear canal of the human is greater than 8 mm, and the diameter of the microphone 130 of the present embodiment is less than or equal to 6 mm, so that the microphone 130 can penetrate the ear canal and approach the tympanic membrane to detect sound waves transmitted in the ear canal. When the ear canal earphone microphone module 100 is worn on the user's ear and penetrates into the ear canal, the sound outlet P10 will face and approach the eardrum of the ear, and the speaker unit 120 and the ear pad 250 will hinder the transmission of environmental noise to The microphone 130 thus produces a passive anti-noise effect and also improves the fidelity of the sound. In particular, the horn unit 120 prevents ambient noise from being transferred from within the housing 110 to the microphone 130, while the ear pad 250 prevents ambient noise from being transmitted from outside the housing 110 to the microphone 130. In addition, since the microphone 130 is very close to the tympanic membrane of the user, the sound waves generated by the tympanic membrane vibration caused by the user's speech can be sensitively detected and collected by the microphone 130, and the human bone can also be well sent out by the user. The sound is delivered into the ear canal and collected by the microphone 130.

In this embodiment, the ear canal microphone speaker module 100 further includes a ventilating moisture-proof member 260 disposed at the sound outlet P12. The permeable moisture barrier element 260 also prevents foreign matter from entering the housing 210. In addition, the sound receiving hole 132 of the microphone 130 may also be provided with a gas permeable moisture barrier element 134. Both the breathable moisture barrier element 260 and the breathable moisture barrier component 134 may be a waterproof breathable membrane, or a moisture resistant treated mesh, or other suitable breathable moisture barrier component.

Because the ear canal microphone speaker module 100 is partially placed in the ear canal and contacts the skin, it is affected by body temperature (36oC), and the exposed portion of the ear canal microphone speaker module 100 is affected by the environment. Generally speaking, when the ambient temperature is close to 0oC, due to the influence of temperature difference, water and gas condensation is likely to occur, which will have a serious impact on the electrostatic microphone, and the sensitivity of the microphone is seriously degraded.

In the present embodiment, the horn unit 120 separates the chamber C10 into a front chamber C12 and a rear chamber C14 that are not ventilated, and the microphone 130 is located in the front chamber C12. In other words, the portion of the horn unit 120 that is in contact with the chamber C10 is substantially a gas-tight contact, so gas cannot be transferred from the rear chamber C14 to the front chamber C12, thereby reducing the possibility of ambient noise being collected by the microphone 130. . The ear pad 250 of the embodiment is disposed outside the side of the housing 110 having the sound outlet P10, and the sound outlet P10 is located in the ear pad 250. The ear pad 250 also constitutes a passage 252 that communicates with the sound port P10. The size of the passage 252 remains fixed or enlarged from the side close to the sound outlet to the side remote from the sound outlet. With such a design, the sound waves generated by the vibration of the eardrum can be blocked as much as possible without being blocked by the ear pad 250 and mostly transmitted to and collected by the microphone 130. The maximum outer diameter of the housing 110 is, for example, less than or equal to 8 mm, so that the user can insert the ear canal of the user when wearing. The diameter of the horn unit 120 of the present embodiment is, for example, less than or equal to 6 mm, and is as close as possible to the microphone 130, so as to reduce the confined space formed between the ear canal and the ear canal earphone microphone module 100, thereby improving the horn single. 120 and the sensitivity of the microphone 130. The microphone 130 can be a condenser microphone or other form of microphone that can be rounded or otherwise look. The sound receiving port 132 of the microphone 130 is for the sound outlet P10, that is, the sound collecting port 132 of the microphone 130 can be seen from the sound outlet port P10 to obtain a better sound receiving effect.

The microphone 130 of the embodiment has a channel T10 between the cavity wall W10 of the chamber C10 for transmitting the sound provided by the horn unit 120 out of the sound port P10 via the channel T10. Therefore, the sound provided by the horn unit 120 can still be well transmitted to the tympanic membrane. In addition, the housing 110 of the present embodiment is integrally formed, and the overall structure is simple and easy to assemble. The ear canal earphone microphone module 100 of this embodiment can adopt a single ear or a double ear design. When the binaural design is adopted, the microphone 130 can be provided only on one side, and the virtual microphone can be set on the other side to make the sound fields on both sides coincide. The virtual microphone has the same appearance as the real microphone 130, but has no radio function.

2 is a cross-sectional view of a speaker in accordance with another embodiment of the present invention. Referring to FIG. 2, the ear canal earphone microphone module 200 of the present embodiment is similar to the ear canal earphone microphone module 100 of FIG. 1, and only the differences between the two are described herein. The ear canal earphone microphone module 200 of the embodiment further includes a Bluetooth communication unit 240 electrically connected to the speaker unit 120 and the microphone 130. The electrical connection between the Bluetooth communication unit 240 and the speaker unit 120 and the microphone 130 may be achieved through the wires and the circuit board, which is omitted in FIG. 2 and is not shown. The ear canal earphone microphone module 200 of the present embodiment transmits and receives an audio signal to the electronic device in a Bluetooth communication mode by using the Bluetooth communication unit 240. At the same time, the Bluetooth communication unit 240 has a voice feedback suppression circuit, so that only the voice signal collected from the voice terminal, that is, the voice emitted by the user, is not included in the voice signal sent by the microphone 130, and is not mixed into the speaker unit 120. The sound of the called party. Of course, the ear canal earphone microphone module of the present invention can also transmit and receive audio signals with the electronic device in a wired manner. This electronic device can have a sound feedback suppression function as described above. In addition, a battery can be disposed in the ear canal earphone microphone module 200, but is omitted in FIG. 2 and is not shown. The entire ear canal earphone microphone module 200 can be placed almost in the ear canal, which is not only more beautiful, but also relieves the burden on the user's ear. In addition, an ear pad 250 can be assembled outside the housing 210 of the ear canal earphone microphone module 200. The ear pad 250 is suitably elastically deformed according to the contour of the ear canal of the user to fit the ear canal and substantially isolate the external sound. In addition, the ear canal microphone speaker module 200 of the embodiment can be built with a microphone signal compensation circuit, or a software or circuit for providing microphone signal compensation by an electronic device such as a connected mobile phone or a Bluetooth communication device, so that the solution can be solved. The vibration of the tympanic membrane may be amplified below 500 Hz and may be attenuated above 2 kHz. Specifically, the Bluetooth communication unit 240 may have a high-pass filter circuit 242 having a cut off frequency of 300 Hz or more and a slope of 3 dB/octave or more. The slope of the high-pass filter circuit 242 means that the power gain of the high-pass filter circuit 242 varies with frequency, and the power gain variation of each octave is greater than or equal to 3 dB.

3A is a partial cross-sectional view of an ear canal earphone microphone module in accordance with still another embodiment of the present invention, and FIG. 3B is a partial cross-sectional view of the housing of the ear canal earphone microphone module of FIG. 3A. Referring to FIG. 3A and FIG. 3B, the earphone microphone 300 of the present embodiment is similar to the earphone microphone 200 of FIG. 2, and only the difference between the two is described here. The earphone microphone 300 of the present embodiment further includes a printed circuit board 370. The microphone 130 is soldered to the printed circuit board 370, for example, using surface mount technology (SMT). The printed circuit board 370 is stuck in the chamber C20 of the housing 310. For example, the cavity wall W20 of the chamber C20 has a card slot G12, and the protrusion on the outer side of the printed circuit board 370 is just seated in the card slot G12. For the convenience of assembly, it is also possible to design the card slot G12 to be closed on the side close to the sound outlet P20 and open on the other side. In this manner, the printed circuit board 370 can be slid in from the open side of the card slot G12 and stopped on the closed side of the card slot G12. Moreover, by adjusting the distance between the closed side of the card slot G12 and the sound outlet P20, it is possible to control the distance between the microphone 130 and the sound outlet P20 at an ideal design value. In addition, the printed circuit board 370 and the cavity wall W20 of the chamber C20 have a channel T20 for the sound provided by the horn unit 120 to be transmitted out of the sound port P20 via the channel T20. Moreover, by changing the cross-sectional shape and size of the passage T20, the effect of adjusting the sound quality emitted by the horn unit 120 can also be achieved. Additionally, the headset microphone 300 further includes a microphone lead 380. The cavity wall W20 of the chamber C20 has a wire groove G14. The microphone lead 380 is electrically connected to the microphone 130, and the microphone lead 380 is extended to the outside through the wire slot G14 to transmit signals and receive power. In other embodiments, the microphone lead 380 can also be connected to another printed circuit board 372, and the lead is pulled from the printed circuit board 372 to the outside. The horn unit 120 is disposed on the printed circuit board 372.

In summary, in the ear canal earphone microphone module of the present invention, the microphone is located between the sound outlet and the speaker unit. Therefore, when the ear canal earphone microphone module of the present invention is worn on the user's ear, the microphone is located between the speaker unit and the eardrum, and the speaker unit and the microphone can jointly isolate the ambient noise to obtain a better sound receiving effect, and Save the cost of active noise immunity.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 300‧‧‧ ear canal microphone module
110, 210, 310‧‧‧ housing
120‧‧‧ horn monomer
130‧‧‧Microphone
132‧‧‧ Receiving port
134, 260‧‧‧ breathable moisture-proof components

150, 250‧‧ ear pads

C10, C20‧‧‧ chamber

C12‧‧‧ front chamber

C14‧‧‧ rear chamber

P10, P12, P20‧‧‧ sound outlet

W10, W20‧‧‧ cavity wall

T10, T20, 252‧‧‧ channels

240‧‧‧Bluetooth communication unit

242‧‧‧High-pass filter circuit

260‧‧‧Dust net

370, 372‧‧‧ Printed circuit boards

380‧‧‧Microphone lead

G12‧‧‧ card slot

G14‧‧‧ wire trough

1 is a partial cross-sectional view of an ear canal earphone microphone module in accordance with an embodiment of the present invention. 2 is a cross-sectional view of an ear canal earphone microphone module in accordance with another embodiment of the present invention. 3A is a partial cross-sectional view of an ear canal earphone microphone module in accordance with still another embodiment of the present invention. 3B is a partial cross-sectional view of the housing of the ear canal earphone microphone module of FIG. 3A.

100‧‧‧ ear canal microphone module

110‧‧‧shell

120‧‧‧ horn monomer

130‧‧‧Microphone

132‧‧‧ Receiving port

150‧‧‧ ear pads

C10‧‧‧ chamber

C12‧‧‧ front chamber

C14‧‧‧ rear chamber

P10‧‧‧ sound outlet

W10‧‧‧ cavity wall

T10‧‧‧ channel

Claims (15)

An ear canal earphone microphone module comprises: a casing having a connected chamber and an outlet; an ear pad disposed outside the casing; a speaker unit disposed in the chamber, the speaker The portion of the cell that is in contact with the chamber is in a gas-tight contact; and a microphone is disposed in the chamber and located between the sound outlet and the speaker unit, wherein the microphone has a diameter of 6 mm or less. The ear canal earphone microphone module according to claim 1, wherein the speaker unit separates the chamber into a front chamber and a rear chamber that are not ventilated, and the microphone is located in the front chamber. . The ear canal earphone microphone module according to claim 1, further comprising a ventilating moisture-proof component disposed at the sound outlet. The ear canal earphone microphone module according to claim 1, wherein the sound receiving hole of the microphone is provided with a gas permeable moisture-proof member. The ear canal earphone microphone module of claim 1, further comprising an ear pad disposed outside the sound outlet of the housing and forming a passage connecting the sound outlet, the size of the passage being The side close to the sound outlet is kept fixed or enlarged toward the side away from the sound outlet. The ear canal earphone microphone module according to claim 1, wherein the speaker unit has a diameter of 6 mm or less. The ear canal earphone microphone module of claim 1, wherein the microphone is a condenser microphone. The ear canal earphone microphone module of claim 1, wherein the microphone and a cavity wall of the chamber have a passage for the sound provided by the speaker unit to be transmitted through the channel. Out of the sound outlet. The ear canal earphone microphone module of claim 1, further comprising a Bluetooth communication unit electrically connected to the speaker unit and the microphone, the Bluetooth communication unit having a sound feedback suppression circuit. The ear canal earphone microphone module as claimed in claim 1, further comprising a Bluetooth communication unit electrically connecting the speaker unit and the microphone, the Bluetooth communication unit having a microphone high-pass filter circuit, the cutoff frequency being greater than Equal to 300Hz. The ear canal earphone microphone module as claimed in claim 1, further comprising a Bluetooth communication unit electrically connected to the speaker unit and the microphone, the Bluetooth communication unit having a microphone high-pass filter circuit having a slope greater than or equal to 3 dB /octave. The ear canal earphone microphone module according to claim 1, wherein the housing is integrally formed, and the maximum outer diameter of the housing is less than or equal to 8 mm. The ear canal earphone microphone module of claim 1, wherein the sound port of the microphone is opposite to the sound outlet. The ear canal earphone microphone module of claim 1, further comprising a printed circuit board, wherein the printed circuit board is placed in the chamber, A microphone is soldered to the printed circuit board, and a path is formed between the printed circuit board and the cavity wall of the chamber for the sound provided by the speaker unit to be transmitted out of the sound outlet via the channel. The ear canal earphone microphone module of claim 1, further comprising a microphone lead, wherein the cavity wall of the chamber has a wire slot, and the microphone lead is electrically connected to the microphone and passes through the wire slot. Extend to the outside world.