JP2017175503A - Acoustic apparatus and acoustic correction program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acoustic apparatus capable of automatically correcting tone quality changed by an acoustic obstacle, reducing a change in tone quality, and performing optimum acoustic correction for the acoustic obstacle.SOLUTION: A processor 15 includes: an acoustic signal acquisition unit 11 that acquires an acoustic signal AS; an obstacle detection unit 14 that is detachably mounted on an acoustic device 10 and detects that there is an acoustic obstacle to the sound output unit 18; and an acoustic signal correction unit 12 that performs acoustic correction on the acoustic signal on the basis of the detection result of the obstacle detection unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an acoustic device and an acoustic correction program, and more particularly to an acoustic device having a speaker and an acoustic correction program thereof.

  In recent years, terminal devices such as portable music players and tablet terminals are rapidly spreading. Such a terminal device is connected to an audio device in which a speaker is incorporated, for example, a so-called dock, and music is played from the speaker. As an acoustic device to which a terminal device is connected, for example, there is a so-called active speaker in which an amplifier is mounted in addition to the speaker.

  For example, Patent Document 1 describes that sound emitted from a speaker is collected by a microphone and the level is adjusted for each frequency band. Patent Document 2 describes that a sound output from a speaker is detected by a microphone, and a frequency characteristic is corrected with reference to a correction coefficient table.

JP 2008-245123 A JP 2002-330499 A

  In a conventional acoustic device having a speaker, there is a problem that when a sound obstacle such as a terminal device such as a tablet terminal or a speaker grill is placed, the sound quality deteriorates due to the sound obstacle. There is also a problem that there is no acoustic device that can appropriately correct the sound quality that changes depending on the presence or absence of an acoustic obstacle.

  Therefore, the problem to be solved by the present invention is the case where the above-mentioned problem is given as an example, and the case where the acoustic obstacle is placed on the acoustic device or when it is placed in a presumed position near the acoustic device. Even if there are sound obstacles, it automatically corrects the sound quality that changes due to the sound obstacle, and it is possible to reduce the change in sound quality and output sound with the sound quality close to when there is no sound obstacle. Providing an acoustic device capable of performing acoustic correction is an example of the subject of the present invention.

  The invention according to claim 1 is an acoustic signal acquisition unit that acquires an acoustic signal, and an obstacle detection unit that is detachably attached to the acoustic device and detects that there is an acoustic obstacle to the sound emitting unit. And an acoustic signal correction unit that performs acoustic correction on the acoustic signal based on the detection result of the obstacle detection unit.

  According to a tenth aspect of the present invention, there is provided a sound emitting unit that is detachably attached to a computer used in an acoustic device that outputs an acoustic output signal to the sound emitting unit, an acoustic signal obtaining unit that obtains the acoustic signal, and the acoustic device. Obstacle detection means for detecting the presence of an acoustic obstacle, size information acquisition means for obtaining size information about the size of the acoustic obstacle when the presence of an acoustic obstacle is detected, size information It is a program for functioning as an acoustic signal correction means for performing acoustic correction on an acoustic signal based on the above.

It is a block diagram which shows the circuit structure of the audio equipment of Example 1 of this invention. FIG. 2 is a perspective view schematically showing the acoustic device of FIG. 1. It is a perspective view which shows typically the cable which connects the tablet apparatus connected to the audio apparatus of Example 1, and a tablet apparatus to an audio apparatus. It is a perspective view which shows typically the state with which the tablet apparatus was mounted | worn on the audio equipment. It is a block diagram which shows an example of a structure of an audio signal correction circuit. (A) is a perspective view which shows the acoustic apparatus of Example 2 typically. (B) is a three-view figure (a front view, a right side view, and a bottom view) showing a speaker grille to be mounted on the acoustic device of Example 2. It is a perspective view which shows the state with which the speaker grille was mounted | worn with the audio apparatus of Example 2. FIG. It is the elements on larger scale which expand and show the detail of the catcher part at the time of the speaker grille of Example 2 being mounted in an audio equipment. FIG. 6 is a block diagram illustrating a circuit configuration of an acoustic device according to Example 3. 12 is a flowchart illustrating an example of correction processing executed by a correction processor according to the third embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings described below, substantially the same or equivalent components are given the same reference numerals.

  In this specification, an “acoustic signal” (hereinafter also referred to as an audio signal) is a signal representing any sound having an acoustic effect such as music, voice, and sound effects, and is a monaural, two-channel, or multi-channel signal. Any of the signals may be used. The audio signal may be an analog signal or a digital signal. Further, when the audio signal is a digital signal, it may be an uncompressed signal or a compressed signal. In the case of a compressed signal, the compression method is MP3 (MPEG Audio Layer-3), WMA (Windows Media Audio) (Windows is a registered trademark), AAC (Advanced Audio Coding), FLAC (Free Lossless Audio Codec), ALAC ( Any compressed signal such as Apple Lossless Audio Codec (Apple is a registered trademark) may be used. Furthermore, the sampling rate and the bit rate are not limited, and any of a fixed bit rate and a variable bit rate may be used.

  In addition, “acoustic correction” or “correction” of an audio signal refers to various acoustic corrections such as correction of frequency characteristics and phase characteristics of the audio signal, delay time correction, correction based on impulse response, and equalization. including. Further, the correction includes performing correction by converting the analog signal or the digital signal as it is, converting the analog signal into a digital signal, or converting the digital signal into an analog signal.

  In addition, “correction” of the audio signal includes individually performing correction processing on the audio signal of each channel with respect to a 2-channel or multi-channel speaker (sound emitting unit).

  FIG. 1 is a block diagram illustrating a circuit configuration of the acoustic device 10 according to the first embodiment. The acoustic device 10 includes an audio signal receiving circuit (audio signal receiving unit) 11, an audio signal correcting circuit (audio signal correcting unit) 12, a sensor 13, an obstacle detecting circuit (obstacle detecting unit) 14, and an amplifying circuit (amplifying unit). ) 17 and speaker 18.

  In the following, a case where the acoustic device 10 is a two-channel stereo acoustic device will be described as an example, but it may be a monaural acoustic device or a multi-channel acoustic device.

  FIG. 2 is a perspective view schematically illustrating the acoustic device 10 according to the first embodiment. FIG. 3 is a perspective view schematically showing the tablet device 30 connected to the audio device 10 according to the first embodiment and the cable 35 that connects the tablet device 30 to the audio device 10.

  The acoustic device 10 is configured as a so-called dock device to which a music playback device such as a tablet device can be attached and detached. Specifically, the acoustic device 10 includes a housing 21, and a tablet device (music playback device) 30 is mounted on the upper surface (mounting surface) 21 </ b> S of the housing 21.

  More specifically, a processor 15, which is a circuit board on which an audio signal receiving circuit 11, an audio signal correction circuit 12, an obstacle detection circuit 14, and an amplifier circuit (amplifier) 17 are mounted, is incorporated in the casing 21. (Shown with a broken line).

  A plurality of circuits among the audio signal receiving circuit 11, the sensor 13, the audio signal correcting circuit 12, the obstacle detecting circuit 14, and the amplifier circuit 17 are configured as one signal processing circuit or a processor such as a DSP (Digital Signal Processor). It may be.

  A sensor 13 and a speaker 18 are attached to the housing 21. The amplifier circuit 17 includes a two-channel amplifier 17R (right channel: Rch) and an amplifier 17L (left channel: Lch), and the speaker 18 includes a speaker 18R and a speaker 18L connected to the amplifier 17R and the amplifier 17L, respectively.

  Further, the housing 21 of the acoustic device 10 is provided with a connector 22 on the front or back surface of the housing 21 to which a music playback device such as a portable music player, a tablet terminal, or a tablet PC can be connected. The connector 22 may be a dedicated connector for connecting the tablet device 30 or a general-purpose connector such as a USB (Universal Serial Bus).

  One end of the cable 35 is provided with a connector 36A connected to the connector 32 of the tablet device 30, and the other end thereof is provided with a connector 36B connected to the connector 22 of the acoustic device 10 (FIG. 2). ).

  The audio device 10 may further include a communication unit 24 such as Bluetooth (registered trademark) that can be wirelessly connected to a music playback device such as the tablet device 30. Further, the communication unit 24 may be configured to communicate with an external device in a wired manner via a cable connected to the connector 22.

  FIG. 4 is a perspective view schematically showing a state in which the tablet device 30 is mounted (or mounted) on the acoustic device 10. As shown in FIG. 4, the tablet device 30 is mounted on the audio device 10, the tablet device 30 and the audio device 10 are connected by a cable 35, and an audio signal is input to the audio signal receiving circuit 11 via the connector 22. The

  The mounting surface 21S on the housing 21 of the acoustic device 10 is provided with a mounting mechanism or a fixing mechanism (not shown) such as a groove or unevenness or a clip for mounting the tablet device 30 at a predetermined position. Also good.

  Next, the operation of the acoustic device 10 will be described. As shown in FIG. 1, the audio signal receiving circuit 11 receives an audio signal (original sound signal) output from the tablet device 30 via the cable 35.

  The obstacle detection circuit 14 includes a sensor 13 and detects that the tablet device 30 as an acoustic obstacle (acoustic obstacle) is mounted on the acoustic device 10 (that is, there is an acoustic obstacle). (judge. That is, when the obstacle detection circuit 14 detects that the tablet device 30 is mounted based on the sensor signal, the obstacle detection circuit 14 generates a detection signal DS indicating that there is an acoustic obstacle, and otherwise Generates a detection signal DS indicating that there is no acoustic obstacle.

  As the sensor 13, for example, various sensors capable of detecting that the tablet device 30 is mounted on the acoustic device 10 such as an optical sensor, an infrared sensor, a mechanical sensor, and an ultrasonic sensor can be used.

  In addition, the obstacle detection circuit 14 may detect that the tablet device 30 is attached when the tablet device 30 is connected to the connector 22 of the acoustic device 10. Alternatively, it may be detected that the tablet device 30 is attached by connecting the tablet device 30 via the communication unit 24.

  The audio signal correction circuit 12 performs an acoustic correction process (hereinafter also simply referred to as a correction process) on the audio signal AS received from the tablet device 30 based on the detection signal DS indicating the detection result of the obstacle detection circuit 14 to perform correction. An audio signal CS is generated. The amplifiers 17R and 17L of the amplifier circuit 17 amplify the corrected audio signal CS and drive the speakers 18R and 18L, respectively.

  Note that the audio signal correction circuit 12 may include a reproduction circuit 12A including a decoder circuit that decodes signals of formats such as MP3, AAC, and FLAC, and a conversion circuit such as bit rate conversion. Therefore, the audio signal correction circuit 12 may be configured to perform correction processing and reproduction processing of the audio signals AS of various formats input to the acoustic device 10.

  The audio signal correction circuit 12 may be configured as hardware, or may be configured as software that performs correction using correction data.

  FIG. 5 is a block diagram showing an example of the configuration of the audio signal correction circuit 12. The audio signal correction circuit 12 includes an input-side switch circuit 41A, an output-side switch circuit 41B, and a correction unit 42 of the audio signal correction circuit 12. A detection signal DS is supplied from the obstacle detection circuit 14 to the switch circuits 41A and 41B, and the correction circuit of the correction unit 42 is switched based on the detection signal DS.

  More specifically, when the detection signal DS indicates that there is no acoustic obstacle, that is, the tablet device 30 is not mounted on the acoustic device 10 (DS = 0), the switch circuits 41A and 41B are: The audio signal AS is switched so as to be connected to the first correction circuit (correction (1)) 42A (solid line in the figure). The correction unit 42 performs a correction process on the audio signal AS by the first correction circuit 42A, and generates a corrected audio signal CS.

  On the other hand, when the detection signal DS indicates that there is an acoustic obstacle, that is, the tablet device 30 is mounted on the acoustic device 10 (DS = 1), the switch circuits 41A and 41B have the audio signal AS first. The second correction circuit (correction (2)) 42B is switched so as to be connected (broken line in the figure).

  In this case, the correction unit 42 performs a correction process on the audio signal AS by the second correction circuit 42B to generate a corrected audio signal CS. The second correction circuit 42B performs correction processing so as to correct the sound quality changed by the acoustic obstacle (tablet device 30). Therefore, it is possible to output sound with a sound quality close to that when there is no acoustic obstacle.

  That is, in the correction unit 42, when the tablet device 30 is removed from the acoustic device 10, the second correction circuit is switched to the first correction circuit 42A, and the tablet device 30 is removed from the non-wearing state. Is attached to the second correction circuit, the first correction circuit 42A is switched to the second correction circuit.

  When the tablet device 30 is not mounted on the audio device 10 (DS = 0), the first correction circuit (correction (1)) outputs the audio signal AS as it is without correcting the audio signal AS. It may be configured as a circuit.

  The corrected audio signal CS from the correction unit 42 is supplied to the amplification circuit 17 and amplified by the amplification circuit 17. The corrected audio signal CS is amplified and then supplied to the speaker 18 as an acoustic output signal AO. The speaker 18 is driven by the sound output signal AO, and the sound is output from the speaker 18.

  Although the case where the correction unit 42 includes the first correction circuit 42A and the second correction circuit 42B has been described, the present invention is not limited to this. For example, the correction unit 42 may be configured as a processor such as a DSP (Digital Signal Processor), and may be configured to perform correction processing on the audio signal AS by switching correction data in accordance with the detection signal DS. That is, according to the presence or absence of an acoustic obstacle, correction processing using the first correction data (corresponding to the first correction circuit 42A) and correction processing using the second correction data (second correction circuit 42B), respectively. It may be configured to perform switching.

  As described above, according to the acoustic device 10 of the present embodiment, when an acoustic obstacle such as a terminal device such as a tablet terminal is placed on the acoustic device 10, the sound quality changed by the acoustic obstacle is automatically corrected. In addition, it is possible to reduce the change in sound quality and output sound with a sound quality close to that when there is no acoustic obstacle.

  FIG. 6A is a perspective view schematically showing an acoustic device 50A of the second embodiment. FIG. 6B is a three-side view (a front view, a right side view, and a bottom view) showing the speaker grille 52 attached to the acoustic device 50A. FIG. 7 is a perspective view showing a state in which the speaker grill 52 is attached to the acoustic device 50A, that is, the speaker device 50 with a grill.

  The acoustic device 50A includes a processor 15 (indicated by a broken line) that is a circuit board on which the audio signal receiving circuit 11, the audio signal correcting circuit 12, the obstacle detecting circuit 14, and the amplifier circuit 17 are mounted. The circuit configuration of the processor 15 is the same as that of the first embodiment (FIG. 1).

  The acoustic device 50 </ b> A includes a speaker 18 </ b> R (right speaker) and a speaker 18 </ b> L (left speaker) connected to the amplifier circuit 17.

  In addition, the audio device 50A is provided with a connector 22 on the side surface or the back surface of the audio device 50A, to which various music playback devices such as a portable music player, a tablet device, and a CD player can be connected. An audio signal is input to the audio signal receiving circuit 11 via the connector 22.

  Furthermore, the audio device 50A may be provided with a communication unit 24 that can be connected to a music playback device wirelessly or by wire to receive an audio signal. The communication unit 24 may be configured to perform various communications with an external device wirelessly or by wire.

  That is, the acoustic device 50A is configured as a so-called active speaker device that receives an audio signal, amplifies the audio signal, and drives the speaker. However, the amplifier circuit 17 is not necessarily provided.

  The speaker grille 52 becomes an acoustic obstacle with respect to the acoustic device 50A. As shown in FIGS. 7A and 7B, bosses (projections) 52 </ b> A are provided at the four corners on the back surface of the speaker grille 52. The speaker grille 52 is attached to the acoustic device 50A by pushing the boss 52A into the catcher portion 53 provided in the acoustic device 50A.

  FIG. 8 is an enlarged partial view showing details of the catcher portion 53 when the speaker grille 52 is attached to the acoustic device 50A. At least one of the catchers 53 of the acoustic device 50A is provided with a push-in part 13B biased by a spring and a push switch 13A provided on a PCB (printed circuit board) 13C.

  When the speaker grille 52 is attached to the audio device 50A, the pushing portion 13B is pushed in by the boss 52A of the speaker grille 52, and the switch 13A such as a push switch or a micro switch is pushed to attach the speaker grille 52 to the audio device 50A. It is detected that (contact) has been made. That is, the switch 13A functions as an obstacle detection circuit 14 that detects that the speaker grill 52 as an acoustic obstacle is attached to the acoustic device 50A (that is, there is an acoustic obstacle), and outputs the detection signal DS. Generate. Various sensors, for example, non-contact sensors such as optical sensors and infrared sensors, or contact sensors such as mechanical sensors can be used.

  The operation of the acoustic device 50A is the same as that of the first embodiment (FIGS. 1 and 5). That is, the switch 13A as the obstacle detection circuit 14 detects that the speaker grill 52 as an acoustic obstacle is attached to the acoustic device 50A, and generates a detection signal DS.

  As in the case of the first embodiment (see FIG. 5), when the detection signal DS indicates that the speaker grille 52 is not attached (DS = 0), the audio signal correction circuit 12 is connected to the first correction circuit 42A or The audio signal AS is corrected with the first correction data to generate a corrected audio signal CS. Alternatively, the audio signal correction circuit 12 generates the audio signal AS as it is as the corrected audio signal CS without performing correction processing on the audio signal AS.

  When the detection signal DS indicates that the speaker grille 52 is attached (DS = 1), the audio signal AS is corrected using the second correction circuit 42B or the second correction data to generate a corrected audio signal CS. To do. That is, correction processing is performed so as to correct the sound quality that changes due to the acoustic obstacle (speaker grill). Therefore, it is possible to output sound with a sound quality close to that when there is no obstacle.

  The processor 15 may store a plurality of correction data (CD (1) to CD (n), where n is an integer of 2 or more) in a storage unit (not shown) such as a memory. The plurality of correction data (CD (1) to CD (n)) includes, for example, the size and material of the speaker grill (for example, waterproof type), the material of the grill net (for example, metal or cloth), and the like. It is stored in association with the type of speaker grill (acoustic obstacle).

  The audio signal correction circuit 12 generates correction data (CD (k), k is a natural number) related to the mounted speaker grille according to the detection signal DS indicating the type of the speaker grille from the sensor 13, and the plurality of correction data. The audio signal AS can be selected and used to perform correction processing on the audio signal AS.

  Various methods can be considered for the sensor 13 to generate a detection signal indicating the type of speaker grill. For example, the type of the speaker grill can be detected by a combination of the boss 52A of the speaker grill and the switch 13A. Specifically, the length of each of the four bosses 52A is changed according to the type of the speaker grille, and the speaker is selected according to the number and positions of the switches 13A for pressing (turning on) the switch 13A among the four bosses 52A. The type of grill can be determined.

  Moreover, not only when a mechanical switch is used but a non-contact type sensor can also be used. For example, a plurality of optical sensors are provided in the housing of the acoustic device 50A, and a speaker grille is provided with a reflecting portion or the like at a position corresponding to the type thereof, so that the number and position of optical sensors that detect reflected light at the time of mounting differ. This can be realized.

  Note that the size of the speaker grill can also be determined based on the number and position of the switch 13A and the boss 52A corresponding to the speaker grill, and the number and position of the optical sensor and the reflection portion of the speaker grill.

  The corrected audio signal CS is amplified by the amplifier circuit 17 and then supplied to the speaker 18 as an acoustic output signal AO. The speaker 18 is driven by the sound output signal AO, and the sound is output from the speaker 18.

  As described above, according to the acoustic device 50A of this embodiment, when an acoustic obstacle such as a speaker grill is placed on the acoustic device 50A, the sound quality changed by the acoustic obstacle is automatically corrected, It is possible to output sound with a sound quality close to that when there is no obstacle.

  FIG. 9 is a block diagram illustrating a circuit configuration of the acoustic device 60 according to the third embodiment. The audio device 60 is configured as a dock device to which a music playback device such as a tablet device similar to the audio device 10 of the first embodiment can be attached and detached, and the upper surface (mounting surface) 21S of the housing 21 has different types / Various types of music playback devices can be installed. Below, the case where the said music reproduction apparatus is the tablet apparatus 30 is demonstrated to an example.

  The correction processor 61 has the functions of the audio signal reception circuit 11, the audio signal correction circuit 12, and the obstacle detection circuit 14 in the first embodiment. In this embodiment, a case where the correction processor 61 is configured by a processor such as a DSP or a CPU (Central Processing Unit) will be described as an example. For example, it may be configured as a program executed by the CPU as a control program (correction program) for the CPU.

  More specifically, the correction processor 61 functions as an audio signal correction unit, and further includes an audio signal reception / generation unit 63, an obstacle detection unit 64, and a memory 65.

  The audio signal receiving / generating unit 63 receives the audio signal AS from various music playback devices such as a tablet device. The audio signal receiving / generating unit 63 may be configured to generate an audio signal AS using audio data, for example, audio data stored in the memory 65, and perform a correction process on the audio signal AS.

  The obstacle detection unit 64 indicates that the tablet device 30 is attached to the audio device 10 when the tablet device 30 is connected to the connector 22 or when the tablet device 30 is connected via the communication unit 24. A detection signal DS is generated. The obstacle detection unit 64 also functions as a model determination unit that determines what model the tablet device 30 connected to the connector 22 or the tablet device 30 connected via the communication unit 24 is. To do.

  Specifically, the obstacle detection unit 64 includes a model discrimination unit, and the model discrimination unit includes a tablet from the tablet device 30 connected to the connector 22 or the tablet device 30 connected via the wireless communication unit 24. Information regarding the size (size) and shape of the device 30, for example, size information including the model size and the display size can be acquired. Alternatively, the model information such as the model number of the tablet device 30 may be acquired from the tablet device 30 and, for example, size information regarding the size and shape of the tablet device 30 may be acquired via the Internet.

  The memory 65 stores a plurality of correction data (CD (1) to CD (n), where n is an integer of 2 or more). The plurality of correction data (CD (1) to CD (n)) are stored in association with the size and model of the tablet device 30 to be mounted. The correction processor 61 may be configured to acquire correction data (CD (j), j is an arbitrary natural number) from the outside and store it in the memory 65. In addition to the correction data, the memory 65 may store model information including audio data and size information regarding the playback device attached to the acoustic device 10.

  Hereinafter, the operation of the correction processor 61 will be described. The correction processor 61 corrects the audio signal AS based on the model information from the obstacle detection unit 64 or the model information from the memory 65, and generates a corrected audio signal CS. FIG. 10 is a flowchart illustrating an example of the flow of correction processing executed by the correction processor 61.

  First, the correction processor 61 detects that the tablet device 30 that is an acoustic obstacle is attached (that is, there is an acoustic obstacle) (step S11).

  When it is detected that the tablet device 30 is attached, the size information of the attached tablet device 30 (acoustic obstacle) is acquired from the obstacle detection unit 64 (step S12).

  Next, correction data (CD (k)) related to the size information of the tablet device 30 (acoustic obstacle) is read from the memory 65, or correction data (CD (k)) is acquired from the outside (step S13). .

  Then, the correction processor 61 performs correction processing on the audio signal AS using the read or acquired correction data (CD (k)) (step S14), and generates a corrected audio signal CS.

  Further, another operation executed by the correction processor 61 will be described next. First, the correction processor 61 acquires size information of the attached tablet device 30 (acoustic obstacle).

  The correction processor 61 calculates the relative positional relationship between the tablet device 30 and the speaker 18. Correction data (CD (k)) optimum for the calculated relative position is acquired from the memory 65. The optimum correction data may be acquired from the outside.

  More specifically, for example, the speaker 18 is not limited to being attached to the housing 21 of the acoustic device 10, and may be disposed at a predetermined position (relative position) with respect to the acoustic device 10. In such a case, the correction processor 61 calculates the relative positional relationship between the tablet device 30 and the speaker 18 and performs correction. That is, the position of the speaker 18 with respect to the acoustic device 10 (sound emitting unit position) is acquired in advance by the correction processor 61. For example, the sound emitting unit position is stored in the memory 65. Further, the correction processor 61 calculates the position (relative position) of the acoustic obstacle with respect to the sound emitting unit position using the size information of the acoustic obstacle (tablet device 30). The correction processor 61 can perform correction processing using optimal correction data based on the calculated relative position.

  More specifically, for example, the speakers 18 </ b> R and 18 </ b> L are respectively housed in a housing (enclosure) different from the housing 21 of the acoustic device 10. The positions of the speakers 18R and 18L (sound emission part positions) with respect to the acoustic device 10 are stored in the memory 65 in advance, or are calculated from the size information of the acoustic device 10 and the size information of the enclosure. The size information of the sound device 10 and the size information of the enclosure are stored in the memory 65 in advance or can be acquired from the outside.

  On the other hand, the speakers 18R and 18L are configured to be arranged at positions where a relative positional relationship with the acoustic device 10 (housing 21) can be calculated. For example, each enclosure and the sound device 10 are designed so that each enclosure of the speakers 18R and 18L is arranged at a predetermined position (relative position) with respect to the sound device 10 (housing 21). The correction processor 61 uses the size information of the tablet device 30 (acoustic obstacle) to calculate the position (relative position) of the tablet device 30 (acoustic obstacle) with respect to the speakers 18R and 18L (sound emission unit). Based on the calculated relative position, the correction processor 61 selects optimal correction data from correction data (CD (j), j is a natural number), and performs correction processing.

  When the speaker 18 is a two-channel system or a multi-channel system having a plurality of speakers, the correction processor 61 uses the size information of the acoustic obstacle (for example, the tablet device 30) to release the plurality of channels. The position (relative position) of the acoustic obstacle with respect to each position of the sound part (speaker) is calculated. The correction processor 61 can be configured to individually perform correction processing on the audio signal of each channel based on each of the calculated relative positions.

  Note that the correction processor 61 may be configured to generate the audio signal AS using the audio data stored in the memory 65 and perform correction processing on the audio signal AS.

  Further, in the above-described embodiment, the correction processor 61 may be configured to perform correction according to the position assumed by the listener. More specifically, for example, the memory 65 stores correction data corresponding to an assumed listener position, and the correction processor 61 is configured to perform correction processing using the correction data corresponding to the listener position. May be. For example, in the above-described embodiment, a plurality of correction data (CD (1) to CD (n)) is stored as correction data optimized according to the listener position.

  Note that the control program may be configured so that the CPU executes the above-described correction processing.

  The corrected audio signal CS is amplified by the amplifier circuit 17 and then supplied to the speaker 18 as an acoustic output signal AO. The speaker 18 is driven by the sound output signal AO, and the sound is output from the speaker 18. The corrected audio signal CS may be configured to be supplied to the speaker 18 without being amplified and to be acoustically output from the speaker 18.

  Therefore, according to the acoustic device of the present embodiment, even when an acoustic obstacle such as a terminal device of an arbitrary model is placed on the acoustic device, an optimal acoustic correction process is performed for the acoustic obstacle. Therefore, it is possible to automatically correct the sound quality that changes due to the acoustic obstacle, and to output the sound with a sound quality close to that when there is no acoustic obstacle.

10, 50A, 60: sound device, 11: audio signal receiving unit, 12: audio signal correcting unit, 13: sensor, 14: obstacle detecting unit, 15: processor, 17: amplifying unit, 18: speaker, 22: connector 24: communication unit 61: processor 63: audio signal reception / generation unit 64: obstacle detection unit 65: memory

Claims (10)

An acoustic device that outputs an acoustic output signal to a sound emitting unit,
An acoustic signal acquisition unit for acquiring an acoustic signal;
An obstacle detection unit that is detachably attached to the acoustic device and detects that there is an acoustic obstacle to the sound emitting unit;
An acoustic signal correction unit that performs acoustic correction on the acoustic signal based on the detection result of the obstacle detection unit;
An acoustic device.   The acoustic device according to claim 1, further comprising: a size information acquisition unit that acquires size information related to a size of the acoustic obstacle, wherein the acoustic signal correction unit performs acoustic correction on the acoustic signal based on the size information. .   The acoustic signal correction unit calculates a relative position of the acoustic obstacle with respect to a position of the sound emitting unit using the size information of the acoustic obstacle, and based on the calculated relative position, calculates the acoustic signal. The acoustic device according to claim 2, which performs acoustic correction.   The acoustic obstacle is a reproduction device that is detachably attached to the acoustic device and supplies the acoustic signal, and the acoustic signal correction unit applies the acoustic signal to the acoustic signal based on size information about the size of the reproduction device. The acoustic device according to claim 2 or 3, which performs acoustic correction. A storage unit for storing a plurality of correction data associated with a model of the playback device;
A model information acquisition unit that acquires model information indicating the model of the playback device;
The acoustic device according to claim 3 or 4, wherein the acoustic signal correction unit acquires the correction data associated with the acquired model information from the storage unit and performs the acoustic correction.   The sound emitting unit is configured as a plurality of sound emitting units, and the acoustic signal correcting unit is configured to position the acoustic obstacle relative to each position of the plurality of sound emitting units based on the size information of the playback device. 6. The acoustic device according to claim 3, wherein acoustic correction is performed on the acoustic signal based on the calculated relative positions.   7. The acoustic signal correction unit according to claim 1, wherein when the obstacle detection unit detects that the acoustic obstacle has been removed from the acoustic device, the acoustic signal correction unit switches to acoustic correction when there is no acoustic obstacle. The acoustic device according to claim 1.   The acoustic device according to claim 1, wherein the obstacle detection unit is a contact sensor or a non-contact sensor.   The acoustic device according to claim 1, wherein the obstacle detection unit detects that the acoustic obstacle is present when the playback device is connected to the acoustic device. A computer used in an acoustic device that outputs an acoustic output signal to a sound emitting unit,
An acoustic signal acquisition means for acquiring an acoustic signal;
Obstacle detection means for detecting that there is an acoustic obstacle to the sound emitting unit, which is detachably attached to the acoustic device,
When it is detected that the acoustic obstacle is present, size information acquisition means for acquiring size information regarding the size of the acoustic obstacle;
Acoustic signal correction means for performing acoustic correction on the acoustic signal based on the size information;
Program to function as.

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