CN216673280U - Speaker and electronic equipment - Google Patents
Speaker and electronic equipment Download PDFInfo
- Publication number
- CN216673280U CN216673280U CN202122772190.7U CN202122772190U CN216673280U CN 216673280 U CN216673280 U CN 216673280U CN 202122772190 U CN202122772190 U CN 202122772190U CN 216673280 U CN216673280 U CN 216673280U
- Authority
- CN
- China
- Prior art keywords
- amplitude
- vibration unit
- loudspeaker
- sensor
- speaker
- 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.)
- Active
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model relates to the technical field of audio equipment, and provides a loudspeaker and electronic equipment, wherein the loudspeaker comprises: a housing assembly defining a housing chamber therein; a vibration unit mounted within the housing assembly, the vibration unit dividing the housing chamber into a first chamber and a second chamber; the amplitude sensor is arranged on the shell assembly, is positioned in the first cavity and is opposite to the vibration unit; and an amplifier electrically connected to the vibration unit and the amplitude sensor, the amplifier outputting an amplitude adjustment signal to the vibration unit based on an amplitude signal output from the amplitude sensor. This speaker sets up amplitude sensor through the position directly over the vibration unit, carries out real-time supervision and protection to the vibration condition of speaker vibration unit, effectively avoids the speaker amplitude to transship, promotes the broadcast effect of speaker.
Description
Technical Field
The utility model relates to the technical field of audio equipment, in particular to a loudspeaker and electronic equipment.
Background
The loudspeaker is widely applied to various electronic equipment such as mobile phones, learning machines, translators, recording pens and the like, and whether the amplitude is overloaded is an important basis for judging the quality of the loudspeaker.
At present, the adjustment of sound effect and the protection of amplitude are realized mainly by testing the amplitude of a sample, then performing parameter modeling, and writing configuration parameters into an algorithm of a loudspeaker product.
The parameters for realizing amplitude protection in the amplitude protection technology are sample test parameters, certain errors exist between the sample test parameters and actually used loudspeaker products, and after the loudspeaker is used for a period of practice, deviation can also occur between the actual parameters and initial test values, so that the phenomenon that amplitude is overloaded or output power cannot be completely released is easily caused, and the use experience of a user is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a loudspeaker and electronic equipment, which are used for solving the problem that the loudspeaker in the prior art is easy to generate amplitude overload to influence the playing effect, realizing the regulation and control of the amplitude of the loudspeaker, improving the playing effect and prolonging the service life.
The present invention provides a speaker, including:
a housing assembly defining a housing chamber therein;
a vibration unit mounted within the housing assembly, the vibration unit dividing the housing chamber into a first chamber and a second chamber;
the amplitude sensor is arranged on the shell assembly, is positioned in the first cavity and is opposite to the vibration unit;
and an amplifier electrically connected to the vibration unit and the amplitude sensor, the amplifier outputting an amplitude adjustment signal to the vibration unit based on an amplitude signal output from the amplitude sensor.
According to the loudspeaker provided by the utility model, the shell assembly is provided with the plurality of amplitude sensors, the plurality of amplitude sensors are uniformly arranged on the shell assembly, and the plurality of amplitude sensors are arranged opposite to the vibration unit.
According to a speaker provided by the present invention, the plurality of amplitude sensors include:
the central amplitude sensor is arranged opposite to the central point of the vibration unit;
and each corner amplitude sensor is arranged opposite to each corner point of the vibration unit.
According to the present invention, there is provided a speaker, further comprising:
an adaptive filter electrically connected between the amplitude sensor and the amplifier, the adaptive filter being configured to output a compensation signal to the amplifier based on an amplitude signal output by the amplitude sensor, the compensation signal being configured to adjust distortion of a speaker.
According to the present invention, there is provided a speaker, the housing assembly comprising:
a first housing defining the first chamber with the vibration unit, the amplitude sensor being mounted to the first housing;
a second housing defining the second chamber with the vibration unit.
According to the present invention, there is provided a speaker, the housing assembly comprising:
the steel sheet is located in the first cavity, and the amplitude sensor is installed on the steel sheet.
According to the loudspeaker provided by the utility model, the amplitude sensor is a laser vibrometer.
According to the present invention, there is provided a speaker, the vibration unit including:
a basin stand;
the vibrating diaphragm is arranged on the basin frame, and the amplitude sensor is opposite to the vibrating diaphragm.
The present invention also provides an electronic device comprising:
an apparatus main body;
as described above, the speaker is attached to the device main body.
According to an electronic device provided by the present invention, the electronic device further includes:
a microphone;
the echo eliminating device is electrically connected with the microphone and the amplitude sensor of the loudspeaker, and the echo eliminating device is used for outputting target audio data based on the audio signal picked up and output by the microphone and the amplitude signal output by the amplitude sensor.
According to the loudspeaker and the electronic equipment, the amplitude sensor is arranged at the position right above the vibration unit, the amplifier is used for processing the amplitude signal detected by the amplitude sensor and outputting the corresponding amplitude adjusting signal, so that the real-time monitoring and protection of the loudspeaker vibration unit are realized, the early warning is carried out on the bad state, the amplitude of the loudspeaker is effectively protected, the output power is completely released, the condition that the amplitude of the loudspeaker is overloaded is effectively avoided, the playing effect of the loudspeaker is improved, and the service life is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is one of the schematic structural diagrams of a speaker provided by the present invention;
fig. 2 is a second schematic structural diagram of a speaker according to the present invention;
fig. 3 is one of the schematic position diagrams of the amplitude sensor in the speaker provided by the present invention;
fig. 4 is a second schematic diagram of the position of an amplitude sensor in the speaker provided by the present invention;
fig. 5 is one of schematic circuit structures of a speaker according to the present invention;
fig. 6 is a second schematic circuit diagram of the speaker according to the present invention;
fig. 7 is a third schematic circuit diagram of the speaker according to the present invention.
Reference numerals:
10: a vibration unit; 20: an amplitude sensor; 21: a first amplitude sensor;
22: a second amplitude sensor; 23: a third amplitude sensor; 24: a fourth amplitude sensor;
25: a fifth amplitude sensor; 31: a first housing; 32: a second housing;
33: a steel sheet; 40: an amplifier; 50: an adaptive filter;
60: an echo cancellation device; 70: a microphone; 80: a far-end microphone;
90: a distal end vibration unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
The speaker of the present invention will be described below with reference to fig. 1 to 7.
The speaker of the present invention includes: a housing assembly, a vibration unit 10, an amplitude sensor 20 and an amplifier 40.
Wherein the housing assembly is the housing of the loudspeaker, the housing assembly being of hollow construction within, the housing assembly defining a housing chamber which may be used to mount the vibration unit 10.
The vibration unit 10 is a main sound generating device of a speaker, and the vibration unit 10 belongs to a transducer for converting an electric signal into an acoustic signal, and can make the cone or diaphragm of the vibration unit 10 vibrate to generate resonance with the surrounding air to generate sound by using an electromagnetic, piezoelectric or electrostatic effect on an input audio electric signal.
The vibration unit 10 is installed in the housing assembly, and the vibration unit 10 divides the housing chamber into a first chamber and a second chamber.
In this embodiment, the first chamber formed between the vibration unit 10 and the housing assembly is an open chamber, the second chamber formed between the vibration unit 10 and the housing assembly is a closed chamber, the housing assembly in the first chamber portion is provided with an opening or hole, and sound generated by vibration of the vibration unit 10 is transmitted from the open first chamber.
In practical implementation, the speaker may be a side-firing speaker configuration as shown in fig. 1, or may be a positive-firing speaker configuration as shown in fig. 3.
An amplitude sensor 20 is also provided in the first chamber of the loudspeaker, the amplitude sensor 20 being mountable on the housing assembly, the amplitude sensor 20 being disposed directly opposite the vibration unit 10.
The amplitude sensor 20 can detect the amplitude generated by the surface vibration of the object, collect the mechanical quantity of the vibration by receiving, convert into proportional electric quantity, and output a corresponding amplitude signal x (t).
The amplitude signal x (t) output by the amplitude sensor 20 may represent the variation of the vibration displacement of the vibration unit 10.
In practical implementation, the amplitude sensor 20 may be a mechanical amplitude sensor or an optical amplitude sensor.
It is understood that the arrangement of the amplitude sensor 20 opposite to the vibration unit 10 means that the amplitude sensor 20 is arranged opposite to the part of the vibration unit 10 where the vibration sounds, and the amplitude condition of the vibration part of the vibration unit 10 is monitored.
As shown in fig. 5, the loudspeaker is further provided with an amplifier 40 electrically connected to the vibration unit 10 and the amplitude sensor 20, the amplifier 40 being an important element in processing signals in an automation technology tool.
In this embodiment, the amplifier 40 may output an amplitude adjustment signal to the vibration unit 10 to adjust the vibration of the vibration unit 10 based on the amplitude signal x (t) output by the amplitude sensor 20.
The amplitude adjustment signal is a signal for realizing amplitude protection of the vibration unit and adjusting the output amplitude of the vibration unit.
It can be understood that the amplitude overload phenomenon of the vibration unit 10 can be effectively reduced by monitoring the vibration condition of the vibration unit 10 through the amplitude sensor 20, processing the vibration condition through the amplifier 40 with the DSP, and outputting a corresponding amplitude adjustment signal value to the vibration unit 10 to adjust the vibration condition of the vibration unit 10.
In practical implementation, the amplitude sensor 20 monitors the output amplitude signal x (t) and feeds the amplitude signal x (t) back to the amplifier 40 for processing, and if the amplitude signal x (t) is lower than a preset amplitude protection threshold, the audio signal input by the vibration unit 10 is not processed.
If the amplitude signal x (t) detected by the amplitude sensor 20 is higher than or equal to the preset amplitude protection threshold, the amplitude adjustment signal is output to the vibration unit 10 to suppress or reduce the current input to the vibration unit 10, so that the amplitude signal x (t) detected by the amplitude sensor 20 is lower than the amplitude protection threshold, and the vibration unit 10 is prevented from amplitude overload.
In this embodiment, the amplitude sensor 20 monitors that the amplitude signal x (t) exceeds the amplitude protection threshold for a long time, and the amplitude signal x (t) has an amplitude clipping phenomenon that the amplitude of the signal waveform is too large to exceed the linear range of the system, or the loudspeaker is severely distorted, and feeds back the current state of the vibration unit 10, so that a user can adjust the current state in time or determine whether the loudspeaker is damaged according to the amplitude signal x (t) data.
According to the loudspeaker provided by the utility model, the amplitude sensor 20 is arranged at the position right above the vibration unit 10, the amplifier 40 is used for processing the amplitude signal detected by the amplitude sensor 20 and outputting the corresponding amplitude adjusting signal, so that the real-time monitoring and protection of the loudspeaker vibration unit 10 are realized, the early warning is carried out on the bad state, the amplitude of the loudspeaker is effectively protected, the output power is completely released, the condition that the amplitude of the loudspeaker is overloaded is effectively avoided, the playing effect of the loudspeaker is improved, and the service life is prolonged.
In some embodiments, the housing assembly may be provided with a plurality of amplitude sensors 20.
The plurality of amplitude sensors 20 are uniformly arranged on the housing assembly, and the plurality of amplitude sensors 20 are arranged opposite to the vibration unit 10.
In this embodiment, the plurality of amplitude sensors 20 form an array of amplitude sensors 20, the entire array of amplitude sensors 20 is disposed opposite to the vibration unit 10, and the amplitude signal x (t) input to the amplifier 40 is obtained more accurately by processing the amplitude signal x (t) monitored by each of the plurality of amplitude sensors 20.
Amplitude change conditions of different positions of the vibration unit 10 are monitored by each amplitude sensor 20 in the amplitude sensors 20, and amplitude signals x (t) acquired by the amplitude sensors 20 can reflect the amplitude change conditions of vibration of the vibration unit 10 more accurately, so that the real-time monitoring precision and accuracy of the loudspeaker vibration unit 10 are improved.
In this embodiment, the plurality of amplitude sensors 20 are uniformly arranged on the housing assembly, and may be represented by that each amplitude sensor 20 in the plurality of amplitude sensors 20 is equidistantly distributed, or may be represented by that a certain uniform interval is maintained between the amplitude sensors 20.
In practical implementation, the position of each amplitude sensor 20 of the plurality of amplitude sensors 20 is related to the shape of the vibration unit 10, so that the plurality of amplitude sensors 20 can monitor the vibration of the vibration unit 10 in various directions.
In some embodiments, the plurality of amplitude sensors 20 may include a center amplitude sensor and a plurality of corner amplitude sensors.
The central amplitude sensor is opposite to the central point of the vibration unit 10, and each corner amplitude sensor is opposite to each corner point of the vibration unit 10.
In this embodiment, the amplitude sensors 20 are uniformly arranged at positions facing the center point and the corner points of the vibration unit 10, the amplitude signal monitored by the center amplitude sensor can reflect the vibration condition of the center point of the vibration unit 10, and the amplitude signal monitored by the corner amplitude sensor can reflect the vibration condition of the corner points of the vibration unit 10, so that the overall amplitude change condition of the vibration unit 10 is comprehensively and accurately reflected.
The front surface of the vibration unit 10 is rectangular as an example.
The vibrating unit 10 has a center point and four corner points, and the center point is at the intersection of two diagonals of the rectangular vibrating unit 10.
As shown in fig. 2 and 4, one central amplitude sensor and four corner amplitude sensors corresponding to the central point and four corner points are provided on the housing assembly.
The center amplitude sensor is a first amplitude sensor 21 and the four corner amplitude sensors are a second amplitude sensor 22, a third amplitude sensor 23, a fourth amplitude sensor 24 and a fifth amplitude sensor 25, respectively.
The first amplitude sensor 21 is disposed opposite to a center point of the vibration unit 10, and the second, third, fourth and fifth amplitude sensors 22, 23, 24 and 25 are disposed opposite to four corner points of the vibration unit 10, respectively.
In some embodiments, the housing assembly includes a first housing 31 and a second housing 32.
The first housing 31 and the vibration unit 10 define an open first chamber, the amplitude sensor 20 is mounted on the first housing 31 and disposed opposite to the vibration unit 10, and the second housing 32 and the vibration unit 10 define a closed second chamber.
Take a speaker with a positive sounding structure as an example.
As shown in fig. 3, the first housing 31 and the vibration unit 10 define an open first chamber, and the second housing 32 and the vibration unit 10 define a closed second chamber.
As shown in fig. 4, five amplitude sensors 20 are uniformly distributed on the inner wall of the first casing 31 above the vibration unit 10, and the distribution positions of the five amplitude sensors 20 respectively face four corner points and a central point of the vibration unit 10, so that the vibration condition of the vibration unit 10 can be monitored in real time.
In some embodiments, the housing assembly may further include a steel plate 33, the steel plate 33 being mounted to the housing assembly and located within the first chamber, the amplitude sensor 20 being mounted to the steel plate 33.
Take a speaker with a side-emitting structure as an example.
As shown in fig. 1, the vibration unit 10 and the second housing 32 define a closed second chamber, and the vibration unit 10, the first housing 31, and the steel sheet 33 define an open first chamber.
As shown in fig. 2, five amplitude sensors are uniformly distributed on the steel sheet 33 above the vibration unit 10, and the distribution positions of the five amplitude sensors respectively face four corner points and a central point of the vibration unit 10, so that the vibration condition of the vibration unit 10 can be monitored in real time.
In some embodiments, the amplitude sensor 20 may be a laser vibrometer.
The laser vibrometer measures point measurement, line measurement or three-dimensional measurement on a vibrating vibration unit 10 by emitting laser beams, processes collected measurement data, measures related parameters of the vibration condition of the vibration unit 10, and outputs a corresponding amplitude signal x (t).
In actual implementation, the micro laser vibration meter can be arranged on the shell assembly of the loudspeaker, and a plurality of micro laser vibration meters are arranged, so that the real-time monitoring of the vibration condition of the loudspeaker vibration unit 10 is realized.
In some embodiments, the vibration unit 10 includes a frame and a diaphragm.
The vibrating diaphragm is a component which is vibrated and produces sound on the vibrating unit 10, and comprises a sound film, a voice coil and a ball top; the frame is a mounting component of the speaker vibration unit 10, and the diaphragm may be mounted through the frame to form the vibration unit 10.
It can be understood that the diaphragm is a component vibrating on the vibration unit 10, and the amplitude sensor 20 provided on the housing assembly and the diaphragm are arranged opposite to each other, so as to monitor the vibration condition of the diaphragm in real time, and realize real-time monitoring and protection of the amplitude of the speaker.
In some embodiments, the speaker further comprises an adaptive filter 50.
As shown in fig. 6, the adaptive filter 50 is electrically connected between the amplitude sensor 20 and the amplifier 40, and the adaptive filter 50 can receive the amplitude signal x (t) output by the amplitude sensor 20, and feed back a compensation signal e (t) to the input end of the amplifier 40 through amplitude real-time spectrum analysis, wherein the compensation signal e (t) is used for adjusting the distortion of the speaker.
The compensation signal e (t) is combined with the input voltage u (t) of the speaker to be used as an input signal u '(t) of the amplifier 40, and then the input signal u' (t) is input to the vibration unit 10 through the amplifier 40, so that nonlinear distortion compensation is performed on the vibration unit 10 of the speaker, and the distortion of the speaker is reduced.
In the ideal amplifier 40, the output waveform is identical to the input waveform except for amplification, but actually the output waveform is not identical to the input waveform, which is called distortion.
The principle of the speaker vibration unit 10 is that the ac voltage input to the vibration unit 10 from the amplifier 40 makes the voice coil of the vibration unit 10 do the up-and-down cutting magnetic induction line motion in the magnetic field, driving the vibrating diaphragm to vibrate up and down.
In the equivalent circuit of the speaker vibration unit 10, u is the input voltage across the voice coil, i is the input current across the voice coil, and R iseIs the resistance of the voice coil, x (t) is the amplitude signal monitored by amplitude sensor 20, L (x) is the inductance of the voice coil, and L (x) is a function of x (t).
v (t) is the velocity of diaphragm vibration, and v (t) is a function of x (t), which is related to the amplitude signal monitored by the amplitude sensor 20 as follows:
b (x) is a force-electric coupling coefficient, b (x) is a function of x (t), and m is a mass of the vibration unit 10, including the mass of the voice coil, diaphragm, and dome of the vibration unit 10.
k (x) is the modulus of elasticity of the vibration system, as a function of the vibration displacement x (t), RmFor vibration system damping, FmElectromagnetic reluctance force produced for voice coils.
The electromagnetic reluctance force produced by the voice coil can be calculated by the following formula:
the non-linear distortion of the loudspeaker is caused by the non-linear function of the amplitude signals x (t) of the diaphragm vibrations, l (x), b (x), and k (x).
The vibration equation for the corresponding loudspeaker system is obtained as:
order to
Vibration displacement y of diaphragm equal to x1Written in the general simple matrix form:
X＝a(x)+b(x)u
y＝h(x)＝x1
in the above formula:
and (3) performing space coordinate transformation, and transforming an x variable to a z variable:
z1＝T1(x)＝x1
z2＝T2(x)＝x2
in the above equation, t (x) is a transformation matrix for transforming x variables into z variables, and y ═ z1，y′＝z2，y″＝z3The vibration displacement, vibration speed and vibration acceleration of the vibrating diaphragm are respectively.
The matrix can be converted into:
wherein x is T-1(z) is the inverse matrix of the transformation of the z variable to the x variable, f (x) and g (x) are respectively represented as follows:
the voltage u at the input end of the vibration unit passes through the nonlinear systems g (x) and f (x) of the loudspeaker to obtain the vibration displacement y, the vibration speed y 'and the vibration acceleration y' of the diaphragm, wherein the vibration displacement y of the diaphragm is a nonlinear model, and therefore harmonic components are obtained.
y＝x(t)＝x0+x1sinωt+x2sin2ωt+…+xnsinnωt
In the formula, x0Is a fundamental frequency component, x1、x2And xnEtc. are the 1 st harmonic component, the 2 nd harmonic component, and the nth harmonic component, respectively.
The loudspeaker nonlinear n-distortion is:
when the obtained diaphragm displacement only has fundamental frequency component x0And no harmonic component exists, the distortion of the vibration displacement of the diaphragm is very small.
According to the utility model, the vibration displacement of the vibrating diaphragm is monitored in real time, the amplitude signal obtained in real time is subjected to spectrum analysis to obtain the nonlinear harmonic characteristics of the vibration displacement, the nonlinear harmonic characteristics of the vibration displacement are fed back to the input end of the vibration unit 10, and the voltage u (t) is subjected to certain pretreatment by combining with self-adaptive algorithm treatment, so that after the treated voltage u' (t) passes through the nonlinear system, the vibration amplitude of the vibrating diaphragm is only a fundamental frequency component, the harmonic component is reduced, and the distortion is obviously reduced.
The utility model also provides the electronic equipment.
The electronic apparatus includes an apparatus main body and the speaker as described above, the speaker being mounted to the apparatus main body.
In this embodiment, the electronic device may be a mobile phone, a tablet computer, a notebook computer, a wearable device, a recording pen, a translator, an electronic book reader, a wireless headset, an intelligent robot, or other electronic devices.
According to the electronic equipment, the amplitude sensor 20 is arranged at the position right above the vibration unit 10 in the loudspeaker, the amplifier 40 is used for processing the amplitude signal detected by the amplitude sensor 20 and outputting the corresponding amplitude adjusting signal, so that the real-time monitoring and protection of the loudspeaker vibration unit 10 are realized, the bad state is pre-warned, the loudspeaker amplitude is effectively protected, the output power is completely released, the situation that the loudspeaker is overloaded is effectively avoided, the playing effect of the loudspeaker is improved, and the service life is prolonged.
In some embodiments, the electronic device further comprises a microphone 70 and an echo cancellation device 60.
The microphone 70, also called a microphone, is an energy conversion device that converts an acoustic signal into an electric signal.
The echo cancellation device 60 is a processing device provided with an adaptive Acoustic Echo Cancellation (AEC) algorithm, and can process the audio signal d (t) collected and output by the microphone 70 based on the amplitude signal x (t) output by the amplitude sensor 20, and output target audio data.
Wherein the target audio data is audio data from which the speaker-played sound is removed.
It can be understood that the sound played by the speaker will also be collected by the microphone 70, and the amplitude signal monitored by the amplitude sensor 20 in real time is fed back to the echo cancellation algorithm as the echo cancellation reference signal to perform the echo cancellation process, so that the microphone 70 outputs clear, accurate and clean audio data.
Take a voice conversation through an electronic device as an example.
As shown in fig. 7, the current user performs voice communication with the far-end user through the electronic device, the electronic device used by the current user includes a microphone 70, a speaker and an echo cancellation device 60, the vibration unit 10 of the speaker is electrically connected with the echo cancellation device 60, the electronic device used by the far-end user is provided with a far-end microphone 80 and a far-end speaker, and the far-end speaker is provided with a far-end vibration unit 90.
The amplitude sensor 20 in the electronic device of the current user monitors the amplitude signal x (t) of the speaker in real time to obtain an echo estimation displacement x '(t) through coherence estimation, subtracts x' (t) from the audio signal d (t) picked up by the microphone 70 of the current user, filters out the signal at the speaker end through certain algorithm processing, obtains a clean sound signal of the human speech of the current user, and transmits the sound signal to the electronic device used by the remote user.
In the related art, echo cancellation processing is performed on a reference signal acquired by a loudspeaker, the amplitude sensor 20 monitors the amplitude signal of the loudspeaker in real time as the reference signal, and the reference signal includes the nonlinear characteristic of the loudspeaker, so that the signal at the loudspeaker end acquired by the microphone 70 can be removed more accurately, and the quality of audio data output by the microphone 70 is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A loudspeaker, comprising:
a housing assembly defining a housing chamber therein;
a vibration unit mounted within the housing assembly, the vibration unit dividing the housing chamber into a first chamber and a second chamber;
the amplitude sensor is arranged on the shell assembly, is positioned in the first cavity and is opposite to the vibration unit;
and an amplifier electrically connected to the vibration unit and the amplitude sensor, the amplifier outputting an amplitude adjustment signal to the vibration unit based on an amplitude signal output from the amplitude sensor.
2. The loudspeaker of claim 1, wherein the housing assembly is provided with a plurality of amplitude sensors, the plurality of amplitude sensors are uniformly arranged on the housing assembly, and the plurality of amplitude sensors are arranged opposite to the vibration unit.
3. The loudspeaker of claim 2, wherein the plurality of amplitude sensors comprises:
the central amplitude sensor is arranged opposite to the central point of the vibration unit;
and each corner amplitude sensor is arranged opposite to each corner point of the vibration unit.
4. The speaker of claim 1, further comprising:
an adaptive filter electrically connected between the amplitude sensor and the amplifier, the adaptive filter being configured to output a compensation signal to the amplifier based on an amplitude signal output by the amplitude sensor, the compensation signal being configured to adjust distortion of a speaker.
5. The loudspeaker of claim 1, wherein the housing assembly comprises:
a first housing defining the first chamber with the vibration unit, the amplitude sensor being mounted to the first housing;
a second housing defining the second chamber with the vibration unit.
6. The loudspeaker of claim 1, wherein the housing assembly comprises:
the steel sheet is located in the first cavity, and the amplitude sensor is installed on the steel sheet.
7. A loudspeaker according to any one of claims 1 to 6, wherein the amplitude sensor is a laser vibrometer.
8. The speaker according to any one of claims 1 to 6, wherein the vibration unit comprises:
a basin stand;
the vibrating diaphragm is arranged on the basin frame, and the amplitude sensor is opposite to the vibrating diaphragm.
9. An electronic device, comprising:
an apparatus main body;
a loudspeaker according to any one of claims 1 to 8, mounted to the device body.
10. The electronic device of claim 9, further comprising:
a microphone;
the echo eliminating device is electrically connected with the microphone and the amplitude sensor of the loudspeaker, and the echo eliminating device is used for outputting target audio data based on the audio signal picked up and output by the microphone and the amplitude signal output by the amplitude sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772190.7U CN216673280U (en) | 2021-11-12 | 2021-11-12 | Speaker and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772190.7U CN216673280U (en) | 2021-11-12 | 2021-11-12 | Speaker and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216673280U true CN216673280U (en) | 2022-06-03 |
Family
ID=81783508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122772190.7U Active CN216673280U (en) | 2021-11-12 | 2021-11-12 | Speaker and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216673280U (en) |
-
2021
- 2021-11-12 CN CN202122772190.7U patent/CN216673280U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104837092B (en) | Echo cancel method and assembly for Electroacoustic communications equipment | |
| Leach | Introduction to electroacoustics and audio amplifier design | |
| Lissek et al. | Electroacoustic absorbers: bridging the gap between shunt loudspeakers and active sound absorption | |
| JP2018514135A (en) | Dual diaphragm microphone | |
| WO2009145096A1 (en) | Audio input device, method for manufacturing the same, and information processing system | |
| JPS61294992A (en) | Apparatus for converting electrical signal into acoustic signal | |
| CN105210385B (en) | Acoustic equipment and the method for using the acoustic equipment | |
| CN111065035B (en) | Bone conduction earphone testing method and testing system | |
| CN103988485A (en) | Measurement device, measurement system, and measurement method | |
| WO2009142249A1 (en) | Voice input device and manufacturing method thereof, and information processing system | |
| CN105959884A (en) | Plane diagram combined server type servo system and control method thereof | |
| CN101442695B (en) | Microphone system, sound input apparatus and method for manufacturing the same | |
| Garud et al. | A novel MEMS speaker with peripheral electrostatic actuation | |
| CN103096234A (en) | Microphone testing device and method | |
| CN216673280U (en) | Speaker and electronic equipment | |
| Fincham | Refinements in the impulse testing of loudspeakers | |
| CN113543004B (en) | Method and manikin for electroacoustic simulation | |
| KR100785803B1 (en) | Spring structure embedded microphone, speaker and speech recognition/synthesizing device | |
| KR20230007397A (en) | Systems and Methods for Obtaining a Vibration Transfer Function | |
| CN101296533A (en) | Loudspeaker diaphragm equivalent mass and equivalent force measuring method | |
| CN107277730B (en) | Acoustical testing system for electroacoustic transducer | |
| CN112804626B (en) | Method and system for dynamically controlling amplitude of loudspeaker and mobile terminal | |
| KR101757362B1 (en) | Pink noise output method for inspected of acoustic apparatus | |
| US20220277726A1 (en) | Control apparatus, loudspeaker apparatus, and audio output method | |
| CN108051072B (en) | Method and system for calculating insertion loss of sound insulation cover of main noise equipment of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |