CN213244343U - Multichannel story machine circuit and story machine - Google Patents
Multichannel story machine circuit and story machine Download PDFInfo
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- CN213244343U CN213244343U CN202022407828.2U CN202022407828U CN213244343U CN 213244343 U CN213244343 U CN 213244343U CN 202022407828 U CN202022407828 U CN 202022407828U CN 213244343 U CN213244343 U CN 213244343U
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Abstract
The utility model relates to a multichannel story machine circuit and story machine, audio processing module are behind output audio signal, and the pronunciation broadcast module carries out the sound broadcast according to audio signal. The voice playing module performs frequency band division processing on the audio signals through the multi-path sound processing unit so as to enable the frequency bands played by different speaker units to be different. Through the arrangement of more than three sound processing units, more than three paths of sound playing with the same frequency or different frequency, the same signal or different signal can be performed on the voice playing module, so that the types of sound which can be played by the multi-channel storyteller circuit can be enriched, and the imagination development motivation of the vocal music preschool education on preschool education objects can be further improved.
Description
Technical Field
The utility model relates to a preschool education product technical field especially relates to a multichannel story machine circuit and story machine.
Background
The story machine is a brand-new digital preschool education product, is a product combining an early repeater and an mp3 player, and a circuit of the story machine is provided with an operation key and a voice circuit controlled by a microprocessor. The story machine is unique in playing children MP3 with external quality, and can help the children enjoy music, listen to stories, learn English and learn common knowledge, and develop language ability, imagination ability and music perception ability.
With the further development of digital products, the information received by preschool education objects in daily life is more and more abundant. However, the conventional story machine can only perform mono-channel or two-channel playing, and the types of sounds or music that can be played are limited. Traditional music or voice, etc. limit the ability of story tellers to develop preschool educational objects.
In summary, the conventional story machine has the above drawbacks.
Disclosure of Invention
In view of the above, it is necessary to provide a multichannel story machine circuit and a story machine, which address the drawbacks of the conventional story machine.
A multi-channel story machine circuit comprising:
the audio processing module is used for outputting an audio signal;
the voice playing module is used for playing sound according to the audio signal;
the voice playing module comprises more than N sound processing units; wherein N is a natural number and is not less than 3;
the Nth path of sound processing unit comprises a filtering unit, a loudspeaker unit and N-1 audio power feedback amplification units; one end of the filtering unit is used for receiving audio signals, the other end of the filtering unit is connected with the loudspeaker unit through the audio power feedback amplification units in sequence, and the loudspeaker unit is used for playing sound.
According to the multi-channel story machine circuit, after the audio processing module outputs the audio signal, the voice playing module plays the sound according to the audio signal. The voice playing module performs frequency band division processing on the audio signals through the multi-path sound processing unit so as to enable the frequency bands played by different speaker units to be different. Through the arrangement of more than three sound processing units, more than three paths of sound playing with the same frequency or different frequency, the same signal or different signal can be performed on the voice playing module, so that the types of sound which can be played by the multi-channel storyteller circuit can be enriched, and the imagination development motivation of the vocal music preschool education on preschool education objects can be further improved.
In one embodiment, the filtering unit comprises two or more band-pass filters; the band-pass filters are connected in series, one end of the series loop is used for receiving audio signals, and the other end of the series loop is used for being connected with the loudspeaker unit through the audio power feedback amplification units in sequence.
In one embodiment, the pass band of the band-pass filter corresponds to the sound processing unit to which the band-pass filter belongs.
In one embodiment, the filtering unit comprises two band pass filters.
In one embodiment, the audio power feedback amplification unit comprises a power amplification circuit and an audio feedback half-bridge;
the first end of the power amplification circuit is used for being connected with the filtering unit, the second end of the power amplification circuit is used for being grounded through the loudspeaker unit, and the third end of the power amplification circuit is used for being grounded through a first bridge arm of the audio feedback half bridge; the loudspeaker unit is a second bridge arm of the audio feedback half bridge.
In one embodiment, the audio power feedback amplifying unit further comprises a frequency equivalent circuit;
one end of the frequency equivalent circuit is connected with the second end of the frequency amplifying circuit, and the other end of the frequency equivalent circuit is grounded through the loudspeaker unit; the frequency equivalent circuit comprises a high-frequency equivalent circuit or a low-frequency equivalent circuit.
In one embodiment, the power amplification circuit comprises a power amplifier and an integration circuit;
the non-inverting input end of the power amplifier is the first end of the power amplifying circuit; the inverting input end of the power amplifier is connected with the output end of the power amplifier through the integrating circuit, and the output end of the power amplifier is the second end of the power amplifying circuit.
In one embodiment, the integrating circuit comprises an operational amplifier, a positive feedback resistor, a negative feedback resistor, a grounding resistor and a negative feedback capacitor;
the non-inverting input end of the operational amplifier is the input end of the integrating circuit; the output end of the operational amplifier is the output end of the integrating circuit and is connected with the inverting input end of the audio power amplifier;
the non-inverting input end of the operational amplifier is connected with the output end of the operational amplifier through a positive feedback resistor; the inverting input end of the operational amplifier is connected with the output end of the operational amplifier through a negative feedback resistor and a negative feedback capacitor which are connected in parallel; one end of the negative feedback capacitor connected with the inverting input end of the operational amplifier is grounded through a grounding resistor.
In one embodiment, the playing frequency bands of the speaker units correspond to the sound processing units to which the speaker units belong one to one.
A story machine comprising a story machine housing and multi-channel story machine circuitry as in any one of the embodiments above disposed within the story machine housing.
According to the story machine, after the audio processing module outputs the audio signal, the voice playing module plays the sound according to the audio signal. The voice playing module performs frequency band division processing on the audio signals through the multi-path sound processing unit so as to enable the frequency bands played by different speaker units to be different. Through the arrangement of more than three sound processing units, more than three paths of sound playing with the same frequency or different frequency, the same signal or different signal can be performed on the voice playing module, so that the types of sound which can be played by the multi-channel storyteller circuit can be enriched, and the imagination development motivation of the vocal music preschool education on preschool education objects can be further improved.
Drawings
FIG. 1 is a block diagram of a multi-channel story machine circuit module according to an embodiment;
FIG. 2 is a block diagram of a multi-channel story machine circuit module according to another embodiment;
FIG. 3 is a block diagram of a multi-channel story machine circuit module according to another embodiment;
fig. 4 is a schematic diagram of a multi-channel storyteller circuit according to an embodiment.
Detailed Description
For better understanding of the objects, technical solutions and technical effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be noted that the following examples are only for explaining the present invention and are not intended to limit the present invention.
The embodiment of the utility model provides a multichannel story machine circuit.
Fig. 1 is a block diagram of a multi-channel story teller circuit according to an embodiment, and as shown in fig. 1, the multi-channel story teller circuit according to an embodiment includes a module 100 and a module 101:
an audio processing module 100 for outputting an audio signal;
the voice playing module 101 is configured to play a sound according to the audio signal;
the voice playing module 101 includes more than N sound processing units 102; wherein N is a natural number and is not less than 3;
the nth path of sound processing unit 102 includes a filtering unit 200, a speaker unit 202, and N-1 audio power feedback amplification units 201; one end of the filtering unit 200 is used for receiving audio signals, and the other end is connected to the speaker unit 202 through each audio power feedback amplifying unit 201 in sequence, and the speaker unit 202 is used for playing sound.
The audio processing module 100 may output one or more audio signals. When outputting one audio signal, each sound processing unit 102 in the voice playing module 101 receives the audio signal. When the audio processing module 100 outputs multiple audio signals, each sound processing unit 102 in the voice playing module 101 receives the corresponding audio signal; as a preferred embodiment, the sound processing units 102 are in one-to-one correspondence with the audio signals, that is, the number of the audio signal paths output by the audio processing module 100 is the same as and corresponding to the number of the sound processing units 102.
In one embodiment, the audio processing module 100 includes a microprocessor or audio processor. As a preferred embodiment, the audio processing module 100 is implemented as a TAS3308 audio processor.
As shown in fig. 1, the voice playing module 101 includes more than N sound processing units 102, and each sound processing unit 102 independently executes processing and playing of an audio signal. The frequency bands of the same audio signal processed by different sound processing units 102 are different. The multi-band audio signal output of the audio processing module 100 is matched, and the frequency division processing of the sound processing unit 102 is matched, so that the frequency band difference doubling of audio playing is realized, the audio playing type is greatly enriched, and the audio playing in the whole frequency domain is provided. As a preferred embodiment, N is the same as and corresponds to the number of audio signal paths output by the audio processing module 100.
In one embodiment, N is 3. I.e. comprises a three-way sound processing unit 102. The sound processing unit 102 performs frequency division processing on the audio signal through the filtering unit 200 and the audio power feedback amplifying unit 201, and outputs audio signals of high frequency, intermediate frequency, and low frequency.
In one embodiment, the playing frequency bands of the speaker units 202 correspond to the sound processing units 102 to which the speaker units 202 belong one to one.
Wherein, the playing frequency band of the speaker unit 202 is adapted to the processing frequency band of the sound processing unit 102. Taking N equal to 3 as an example, the speaker units 202 under the three-way sound processing unit 102 are a tweeter, a midrange speaker and a woofer, respectively. It should be noted that N is equal to 3 for illustration only, and the sound processing unit 102 may be configured such that the playing frequency bands of different speaker units 202 may be further subdivided, or the playing frequency bands of some speaker units 202 may be the same or similar, such as a combination of three tweeters and one woofer.
The filtering unit 200 performs a preliminary filtering process to distinguish a preliminary audio frequency band.
In one embodiment, fig. 2 is a block diagram of a multi-channel story machine circuit module according to another embodiment, as shown in fig. 2, a filtering unit 200 includes two or more band-pass filters 300; the band-pass filters 300 are connected in series, one end of the series circuit is used for receiving audio signals, and the other end of the series circuit is used for being connected with the speaker unit 202 through the audio power feedback amplification units 201 in sequence.
The bandpass processing of the audio signal is enhanced by two or more bandpass filters 300 connected in series. As a preferred embodiment, the frequency division points of the bandpass filters 300 are the same.
In one embodiment, the pass bands of the band pass filter 300 correspond to the sound processing units 102 to which the band pass filter 300 belongs.
The type of the band-pass filter 300 is related to the sound processing unit 102 to which the band-pass filter 300 belongs, that is, the frequency band required by the sound processing unit 102 and available for the speaker unit 202 to play determines the pass frequency band of the band-pass filter 300. Based on this, the band pass filter 300 includes a high frequency filter or a low pass filter. As a preferred embodiment, the band-pass filter 300 is an active filter, including a high-pass active filter or a low-pass active filter.
In one embodiment, the high pass active filter is selected from a butterworth filter, a chebyshev filter, a bessel filter, or a linkoviz-rayleigh filter. The low-pass active filter is a Butterworth filter, a Chebyshev filter or a Linkovz-Rayleigh filter.
In one embodiment, the filtering unit 200 includes two band pass filters 300 to facilitate the linearity of the audio signal processing and the sound source fusion.
In one embodiment, fig. 3 is a block diagram of a multi-channel story machine circuit module according to another embodiment, and as shown in fig. 3, the audio power feedback amplifying unit 201 includes a power amplifying circuit 400 and an audio feedback half bridge;
the first end of the power amplification circuit 400 is used for connecting the filtering unit 200, the second end is used for grounding through the speaker unit 202, and the third end is used for grounding through the first bridge arm 401 of the audio feedback half bridge; wherein the speaker unit 202 is the second leg of the audio feedback half bridge.
The power amplifier circuit 400 amplifies the filtered audio signal, and thereby the audio signal has the ability to be driven by the speaker unit 202. The speaker unit 202 is connected to the audio feedback half bridge and serves as a bridge arm of the audio feedback half bridge, and the circuit test card is debugged to reach balance at regular time, so that the sound reproduction effect of the subsequent speaker unit 202 is optimized through the audio feedback half bridge. As a preferred embodiment, first leg 401 includes a bridge resistor.
In one embodiment, as shown in fig. 3, the audio power feedback amplifying unit 201 further includes a frequency equivalent circuit 402;
one end of the frequency equivalent circuit 402 is connected to the second end of the frequency amplifying circuit, and the other end of the frequency equivalent circuit 402 is grounded through the speaker unit 202; the frequency equivalent circuit 402 includes a high frequency equivalent circuit or a low frequency equivalent circuit.
The selection of the high frequency equivalent circuit or the low frequency equivalent circuit is adapted to the band pass selection of the corresponding filtering unit 200. If a high pass filter is selected, the frequency equivalent circuit 402 is selected as a high frequency equivalent circuit, otherwise, a low frequency equivalent circuit is selected.
The audio signal driven by the audio power feedback amplification unit 201 is tuned by the frequency equivalent circuit 402 by using the signal frequency resonance characteristic of the high frequency equivalent circuit or the low frequency equivalent circuit.
In one embodiment, fig. 4 is a schematic diagram of a multi-channel storyteller circuit according to an embodiment, and as shown in fig. 4, a power amplification circuit 400 includes a power amplifier U1 and an integrating circuit;
the non-inverting input terminal of the power amplifier U1 is the first terminal of the power amplifying circuit 400; the inverting input terminal of the power amplifier U1 is connected to the output terminal of the power amplifier U1 through an integrating circuit, and the output terminal of the power amplifier U1 is the second terminal of the power amplifying circuit 400.
The power amplifier U1 is an amplifier based on operational amplifier, and the circuit construction mode is open on the premise of realizing the driving of audio signals. The integration circuit is used for further shaping the audio signal, and the circuit construction mode is not limited on the premise of realizing the driving of the integration circuit.
As a preferred embodiment, as shown in fig. 4, the integrating circuit includes an operational amplifier U2, a positive feedback resistor R1, a negative feedback resistor R2, a ground resistor R3, and a negative feedback capacitor C1;
the non-inverting input end of the operational amplifier U2 is the input end of the integrating circuit; the output end of the operational amplifier U2 is the output end of the integrating circuit and is connected with the inverting input end of the audio power amplifier U1;
the non-inverting input end of the operational amplifier U2 is connected with the output end of the operational amplifier U2 through a positive feedback resistor R1; the inverting input end of the operational amplifier U2 is connected with the output end of the operational amplifier U2 through a negative feedback resistor R2 and a negative feedback capacitor C1 which are connected in parallel; one end of the negative feedback capacitor C1 connected with the inverting input end of the operational amplifier U2 is grounded through a grounding resistor R3.
In the multi-channel storyteller circuit of any of the above embodiments, after the audio processing module 100 outputs the audio signal, the voice playing module 101 performs sound playing according to the audio signal. The voice playing module 101 performs a frequency-division process on the audio signal through the multi-path sound processing unit 102, so that the frequency bands played by different speaker units 202 are different. Through the setting of more than three sound processing units 102, more than three sound playing modules 101 can play sounds with same frequency or different frequency, same signal or different signal, so as to enrich the sound types played by the multi-channel storyteller circuit and further improve the imagination development motivation of the vocal music preschool education on preschool education objects.
The embodiment of the utility model provides a still provide a story machine.
A story machine comprising a story machine housing and multi-channel story machine circuitry as in any one of the embodiments above disposed within the story machine housing.
According to the story machine, after the audio processing module outputs the audio signal, the voice playing module plays the sound according to the audio signal. The voice playing module performs frequency band division processing on the audio signals through the multi-path sound processing unit so as to enable the frequency bands played by different speaker units to be different. Through the arrangement of more than three sound processing units, more than three paths of sound playing with the same frequency or different frequency, the same signal or different signal can be performed on the voice playing module, so that the types of sound which can be played by the multi-channel storyteller circuit can be enriched, and the imagination development motivation of the vocal music preschool education on preschool education objects can be further improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A multi-channel storyteller circuit, comprising:
the audio processing module is used for outputting an audio signal;
the voice playing module is used for playing sound according to the audio signal;
the voice playing module comprises more than N sound processing units; wherein N is a natural number and is not less than 3;
the Nth path of sound processing unit comprises a filtering unit, a loudspeaker unit and N-1 audio power feedback amplification units; one end of the filtering unit is used for receiving the audio signals, the other end of the filtering unit is connected with the loudspeaker unit through the audio power feedback amplification units in sequence, and the loudspeaker unit is used for playing sound.
2. The multi-channel storyboard circuit of claim 1, wherein the filtering unit comprises two or more band-pass filters; the band-pass filters are connected in series, one end of the series loop is used for receiving the audio signals, and the other end of the series loop is used for being connected with the loudspeaker unit through the audio power feedback amplification units in sequence.
3. The multi-channel storyteller circuit of claim 2, wherein the pass band of the band pass filter corresponds one-to-one to the sound processing unit to which the band pass filter belongs.
4. The multi-channel storyboard circuit of claim 2, wherein the filtering unit comprises two band-pass filters.
5. The multi-channel storyteller circuit of claim 1, wherein the audio power feedback amplification unit comprises a power amplification circuit and an audio feedback half bridge;
the first end of the power amplification circuit is used for being connected with the filtering unit, the second end of the power amplification circuit is used for being grounded through the loudspeaker unit, and the third end of the power amplification circuit is used for being grounded through a first bridge arm of the audio feedback half bridge; the loudspeaker unit is a second bridge arm of the audio feedback half bridge.
6. The multi-channel storyboard circuit of claim 5, wherein the audio power feedback amplification unit further comprises a frequency equivalent circuit;
one end of the frequency equivalent circuit is connected with the second end of the frequency amplifying circuit, and the other end of the frequency equivalent circuit is grounded through the loudspeaker unit; wherein the frequency equivalent circuit comprises a high frequency equivalent circuit or a low frequency equivalent circuit.
7. The multi-channel storyteller circuit of claim 5, wherein the power amplification circuit comprises a power amplifier and an integration circuit;
the non-inverting input end of the power amplifier is the first end of the power amplifying circuit; the inverting input end of the power amplifier is connected with the output end of the power amplifier through the integrating circuit, and the output end of the power amplifier is the second end of the power amplifying circuit.
8. The multi-channel storyteller circuit of claim 7, wherein the integration circuit comprises an operational amplifier, a positive feedback resistor, a negative feedback resistor, a ground resistor, and a negative feedback capacitor;
the non-inverting input end of the operational amplifier is the input end of the integrating circuit; the output end of the operational amplifier is the output end of the integrating circuit and is connected with the inverting input end of the power amplifier;
the non-inverting input end of the operational amplifier is connected with the output end of the operational amplifier through the positive feedback resistor; the inverting input end of the operational amplifier is connected with the output end of the operational amplifier through the negative feedback resistor and the negative feedback capacitor which are connected in parallel; and one end of the negative feedback capacitor connected with the inverting input end of the operational amplifier is grounded through the grounding resistor.
9. The multi-channel storyteller circuit as claimed in any one of claims 1 to 8, wherein the playing frequency band of the speaker unit is in one-to-one correspondence with the sound processing unit to which the speaker unit belongs.
10. A story machine comprising a story machine housing and multi-channel story machine circuitry according to any of claims 1 to 9 disposed within the story machine housing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022407828.2U CN213244343U (en) | 2020-10-25 | 2020-10-25 | Multichannel story machine circuit and story machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022407828.2U CN213244343U (en) | 2020-10-25 | 2020-10-25 | Multichannel story machine circuit and story machine |
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| CN213244343U true CN213244343U (en) | 2021-05-18 |
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| CN202022407828.2U Active CN213244343U (en) | 2020-10-25 | 2020-10-25 | Multichannel story machine circuit and story machine |
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