JP2019140645A - Speaker device and control method - Google Patents

Abstract

To provide a speaker device that can prevent a person in a bed from feeling a sound output to a listener in the bed in an environment where a plurality of beds are arranged in the same room.SOLUTION: A speaker device includes a first speaker unit that is provided at a position closer to the center than the end of a bedding on which a living body is mounted with respect to the width direction of the bedding, which is the left-right direction of the living body when the living body is placed in the bedding and that outputs a first sound, a second speaker unit that is provided on the end side of the bedding from a position where the first speaker unit is provided with respect to the width direction in the bedding and outputs a second sound, and on the basis of sound information related to one of the first sound and the second sound, a control unit that controls sound information of the other sound.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a speaker device and a control method.

Conventionally, various sound masking devices that prevent the voice from leaking outside have been proposed. For example, when a conference is performed in a conference room or a conference space, this sound masking device emits a masker sound that prevents a person's voice from being heard outside the conference room or the conference space. The masker sound is generated, for example, by performing a scramble process that divides a speech waveform of a human voice into sections of one syllable and rearranges the divided sections. The masker sound obtained by this method has a sound quality similar to that of a human voice, but it is difficult to hear and understand the content of the story. Patent Document 1 discloses a technique capable of adjusting the clarity of masker sound.
In addition, there is a system in which music and TV sound can be heard while lying down by incorporating a speaker into the pillow. In such a system, it is not necessary to wear headphones or earphones to listen to music or the like, and there is little sense of restraint on the body, so a comfortable sleep environment can be realized. Patent Document 2 discloses a technique for thinning and reducing the thickness of the entire pillow.

JP 2011-154126 A International Publication No. 2017/126257

  However, in an environment where multiple beds are placed in the same room, such as a hospital room or a shared room, if a pillow with the above speakers built into each bed is placed, the sound output from the speakers is not It can be felt that the ears of people in the bed feel annoying. Thus, in such an environment such as a hospital room, it is conceivable to apply a sound masking device as described in Patent Document 1 so that the sound heard by the listener cannot be heard by other people in the bed. . However, the sound masking apparatus as described above outputs a masking sound having a sound quality like a human voice, and suppresses listening to the contents of the sound. For this reason, the person who is in another bed cannot hear the content of the sound, but the sound itself is heard, so that there is a problem that the ear feels bothersome.

  The present invention has been made in view of such a situation, and an object of the present invention is to output sound output to a listener in a certain bed in an environment where a plurality of beds are arranged in the same room. It is an object of the present invention to provide a speaker device that can prevent a person in the room from feeling.

  In order to solve the above-described problem, one aspect of the present invention provides a bedding for placing a living body on the bedding with respect to the width direction of the bedding that is the left-right direction of the living body when the living body is placed. A first speaker unit that is provided at a position closer to the center than the end and outputs a first sound; and a position closer to the end of the bedding than a position where the first speaker unit is provided in the width direction of the bedding A second speaker unit configured to output a second sound; and a control unit configured to control the other sound information based on sound information related to one of the first sound and the second sound. This is a speaker device.

  In one embodiment of the present invention, in the speaker device, the control unit may control the volume of the second sound based on the volume of the first sound.

  According to another aspect of the present invention, in the speaker device described above, the control unit may control the frequency of the second sound based on a frequency characteristic of the first sound.

  According to another aspect of the present invention, in the speaker device, the control unit may control the volume of the first sound based on the volume of the second sound.

  According to another aspect of the present invention, in the speaker device, the control unit may control the frequency of the first sound based on a frequency characteristic of the second sound.

  Further, according to one aspect of the present invention, a head is placed from an end portion of the bedding with respect to a width direction of the bedding that is the left-right direction of the living body when the living body is placed on the bedding on which the living body is placed. A first speaker unit that is provided at a position on the head position side to be placed and outputs a first sound; and an end side of the bedding from a position at which the first speaker unit is provided in the width direction of the bedding A second speaker unit that outputs a second sound; and a position symmetrical to a position where the first speaker unit is provided in the width direction with respect to the head position. A third speaker unit that outputs sound; a fourth speaker unit that is provided on an end side with respect to the width direction from a position where the third speaker unit is provided; and that outputs the second sound; and Sound and the second sound Based on the sound information about one of the sound, a speaker apparatus having a control unit for controlling the other of said sound information.

  In addition, according to one aspect of the present invention, in the bedding on which a living body is placed, a position closer to the center than the end of the bedding with respect to the width direction of the bedding that is the left-right direction of the living body when the living body is placed A first speaker unit that outputs a first sound, and outputs a second sound that is provided on an end side of the bedding from a position where the first speaker unit is provided in the width direction of the bedding. A control method of a speaker device having a second speaker unit, wherein the control unit controls the sound information of the other based on sound information related to one of the first sound and the second sound. It is a control method.

  ADVANTAGE OF THE INVENTION According to this invention, the sound output to the listener who exists in a certain bed in the environment where a several bed is arrange | positioned in the same room can be made not to let the person in the other bed of the same room feel.

It is a block diagram which shows the structural example of the speaker apparatus 1 in embodiment. It is a schematic diagram which shows the example in which the speaker apparatus 1 in embodiment was applied to the bed B. It is a block diagram which shows the structural example of the control part 10 in embodiment. It is a flowchart which shows the operation example of the control part 10 in embodiment. It is a figure which shows the relationship between the speaker apparatus 1 in embodiment, and another bed. It is a block diagram which shows the structural example of 10 A of control parts in the modification 1 of embodiment. It is a flowchart which shows the operation example of 10 A of control parts in the modification 1 of embodiment.

  Hereinafter, a speaker device according to an embodiment will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration example of the speaker device 1 according to the embodiment. The speaker device 1 includes, for example, a control unit 10, an amplifier unit 11, a music speaker unit 12 (music speaker units 12-1 and 12-2), and an environmental sound speaker unit 13 (environmental sound speaker unit). 13-1 and 13-2). Here, the music speaker unit 12 is an example of a “first speaker unit”. The environmental sound speaker unit 13 is an example of a “second speaker unit”.

  Although FIG. 1 illustrates the case where the speaker device 1 is provided with two music speaker units 12 and two environmental sound speaker units 13, the present invention is not limited to this. The speaker device 1 may be provided with at least one speaker unit 12 for music and one speaker unit 13 for environmental sound.

  A sound signal of the target sound is input to the speaker device 1. Here, the target sound is an example of a “first sound”. The target sound is a sound to be prevented from being leaked to another person (hereinafter referred to as another person) different from the listener, and is, for example, music or sound.

  The control unit 10 is, for example, a DSP (Digital Signal Processor), and controls the sound information of the environmental sound based on the sound information regarding the target sound. Here, the environmental sound is an example of a “second sound”.

The sound information is information related to sound, for example, volume and frequency characteristics. The control unit 10 acquires sound information of the target sound based on the sound signal of the target sound.
The environmental sound is a sound that masks the target sound so that the target sound cannot be heard by others. For example, it sounds naturally in the environment, such as a bird singing or a running water sound like a waterfall. It is a sound. By outputting environmental sound, it is possible to make it difficult for others to hear the target sound. In addition, since the environmental sound is a sound that naturally occurs in daily life, it is possible to prevent the environmental sound from being harsh even when others listen to the environmental sound. .

  The control unit 10 controls the sound information of the environmental sound based on the sound information of the target sound. The control unit 10 may use either volume or frequency characteristics as sound information, or may use both. That is, the control unit 10 may control the volume of the environmental sound based on the volume of the target sound. Moreover, the control part 10 may control the frequency characteristic of environmental sound based on the frequency characteristic of target sound. Further, the control unit 10 may control the volume and frequency characteristics of the environmental sound based on the volume and frequency characteristics of the target sound. The control unit 10 controls the sound information of the environmental sound and outputs the controlled sound signal of the environmental sound to the amplifier unit 11.

  The control unit 10 may be configured such that a processor such as a CPU (Central Processing Unit) executes a program stored in a storage unit (not shown). All or part of the control unit 10 may be realized by dedicated hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array).

The amplifier unit 11 amplifies each of the target sound signal and the environmental sound signal output from the control unit 10. The amplifier unit 11 outputs the amplified sound signal of the target sound to the music speaker unit 12 and the amplified environmental sound signal to the environmental sound speaker unit 13.
The music speaker unit 12 outputs a target sound based on the sound signal of the target sound from the amplifier unit 11.
The environmental sound speaker unit 13 outputs an environmental sound based on the environmental sound signal from the amplifier unit 11.

Here, the positional relationship in which the music speaker unit 12 and the environmental sound speaker unit 13 are arranged will be described.
FIG. 2 is a schematic diagram illustrating an example in which the speaker device 1 according to the embodiment is applied to bedding. The speaker device 1 is provided in a bedding having a part on which a living body is placed. Examples of the bedding on which the living body is placed include a pillow, a bed, a mattress, a futon, and a sleeping bag. As shown in FIG. 2, the speaker device 1 is provided in a position where the listener P in the mattress M can hear sound, for example, by being built in a pillow or disposed between the mattress M and the pillow. .

  The music speaker unit 12 is provided at a central position with respect to the width direction of the bedding. Here, the width direction is the left-right direction of the living body when a living body (for example, a person) is placed on the bedding (when taking a sleeping posture). For example, as shown in FIG. 2, when the listener P lies down along the vertical width direction L of the mattress M, the music speaker unit 12 is disposed inside the mattress M with respect to the horizontal width direction W.

  The environmental sound speaker unit 13 is provided on the end side with respect to the width direction of the bedding from the position where the music speaker unit 12 is provided. That is, the music speaker unit 12 and the environmental sound speaker unit 13 are provided along the width direction of the bedding so that the music speaker unit 12 is on the inner side and the environmental sound speaker unit 13 is on the outer side of the bedding. For example, as shown in FIG. 2, the environmental sound speaker unit 13 is provided in the direction of the end 200 or 202 with respect to the width direction W of the bedding from the position where the music speaker unit 12 is provided. Which side of the end portion 200 or 202 the environmental sound speaker unit 13 is provided on may be determined according to the positional relationship between the music speaker unit 12, the listener P, and the others. In this case, the music speaker unit 12 is closer to the listener P than the environmental sound speaker unit 13, and the environmental sound speaker unit 13 is closer to the other person than the music speaker unit 12. Thus, the environmental sound speaker unit 13 is provided.

  As shown in FIG. 2, when two music speaker units 12 are provided, the music speaker unit 12-1 and the music speaker unit 12-2 set the head position T where the head is placed. As a reference, it may be provided at a symmetrical position along the width direction of the bedding. Here, the music speaker unit 12-2 is an example of a “third speaker unit”.

In this case, the music speaker unit 12-1 is provided, for example, at a position between the end 200 and the head position T along the lateral width direction W in the bedding. The music speaker unit 12-2 is provided in a position symmetrical to the position where the music speaker unit 12-1 is provided in the lateral width direction W with respect to the head position T.
Since the two music speaker units 12 are provided at symmetrical positions with respect to the head position T, the music speaker units 12 can be arranged at positions close to the ears of the listener P. It is possible to reduce the volume of the sound output from the unit 12. By suppressing the volume to a low level, it is possible to further suppress the target sound from being heard by others.

  When two music speaker units 12 are provided, two environmental sound speaker units 13-1 and 13-2 may be provided outside each of the two music speaker units 12. Here, the environmental sound speaker unit 13-2 is an example of a “fourth speaker unit”.

  In this case, the environmental sound speaker unit 13-1 is provided on the end (for example, the end 200) side in the lateral width direction W from the position where the music speaker unit 12-1 is provided. Further, the environmental sound speaker unit 13-2 is provided on the end (for example, the end 202) side in the lateral width direction W from the position where the music speaker unit 12-2 is provided.

  2 illustrates the case where the environmental sound speaker unit 13-1 and the environmental sound speaker unit 13-2 are provided at symmetrical positions with respect to the head position T. There is no limit. The environmental sound speaker unit 13-1 only needs to be provided at least on the end side of the position where the music speaker unit 12-1 is provided, and the environmental sound speaker unit 13-2 is at least music. What is necessary is just to be provided in the edge part side rather than the position where the speaker unit 12-2 for vehicles is provided.

Here, processing performed by the control unit 10 will be described with reference to FIGS. 3 and 4.
FIG. 3 is a block diagram illustrating a configuration example of the control unit 10 in the embodiment. The control unit 10 includes, for example, a sound signal acquisition unit 100, a sound information detection unit 101, an environmental sound signal output unit 102, a filter unit 103, and a volume adjustment unit 104.

  The sound signal acquisition unit 100 acquires a sound signal of a target sound input to the speaker device 1 from the outside. The sound signal acquisition unit 100 outputs the acquired sound signal to the sound information detection unit 101.

  The sound information detection unit 101 detects sound information based on the sound signal acquired from the sound signal acquisition unit 100. The sound information detection unit 101 detects the volume of the target sound by, for example, calculating the average value of the absolute value of the signal amplitude of the sound signal in a predetermined section. Moreover, the sound information detection part 101 detects the frequency characteristic of a target sound by carrying out frequency conversion of the sound signal in a predetermined area, for example. The sound information detection unit 101 outputs the detected sound information to each of the environmental sound signal output unit 102, the filter unit 103, and the volume adjustment unit 104.

  Here, the sound information detection unit 101 may output all information of the sound information to each of the environmental sound signal output unit 102, the filter unit 103, and the volume adjustment unit 104, or the environmental sound signal Any information of the sound information corresponding to each of the output unit 102, the filter unit 103, and the volume adjusting unit 104 may be selected and output.

  The sound information detection unit 101 determines which of the sound information is output to each of the environmental sound signal output unit 102, the filter unit 103, and the volume control unit 104, the environmental sound signal output unit 102, You may determine according to the process which each of the filter part 103 and the volume control part 104 performs. For example, when the environmental sound signal output unit 102 performs processing using both the information indicating the volume of the target sound and the information indicating the frequency characteristic, the sound information detection unit 101 converts both information into the environmental sound and sound. The signal is output to the signal output unit 102. In addition, when the environmental sound signal output unit 102 performs processing using only the information indicating the target sound volume, the sound information detection unit 101 uses only the information indicating the target sound volume as the environmental sound signal output unit. To 102. In addition, when the environmental sound signal output unit 102 performs processing using only information indicating the frequency characteristic of the target sound, the sound information detection unit 101 uses only the information indicating the frequency characteristic of the target sound as the environmental sound signal. Output to the output unit 102.

  The environmental sound signal output unit 102 acquires sound information of the target sound from the sound information detection unit 101, and outputs an environmental sound signal based on the acquired sound information. The environmental sound signal output unit 102 refers to, for example, an environmental sound signal stored in a storage unit (not shown) of the speaker device 1, and when the target sound volume is equal to or higher than a predetermined threshold, Is output from the speaker device 1 and an environmental sound signal is output. On the other hand, when the volume of the target sound is less than the predetermined threshold, the environmental sound signal output unit 102 regards that the target sound is not being output from the speaker device 1 and does not output the environmental sound signal.

  The environmental sound signal output unit 102 acquires an environmental sound signal (not shown) input from the outside to the speaker device 1, and the environmental sound is output when the target sound volume is equal to or higher than a predetermined threshold. You may make it output the sound signal of a sound.

  Alternatively, the environmental sound signal output unit 102 may select an environmental sound based on the frequency characteristics of the target sound and output a sound signal of the selected environmental sound. In this case, an environmental sound corresponding to the frequency characteristic of the target sound is stored in a storage unit (not shown) of the speaker device 1. The environmental sound signal output unit 102 refers to the storage unit, and selects the environmental sound according to the characteristic when the signal intensity is equal to or higher than a predetermined threshold in a predetermined frequency band based on the frequency characteristic of the target sound. The sound signal of the selected environmental sound is output.

The filter unit 103 acquires the sound information of the target sound from the sound information detection unit 101, and changes the frequency characteristic of the sound signal of the environmental sound acquired from the environmental sound signal output unit 102 based on the acquired sound information. The filter unit 103 is configured by a digital filter such as a FIR (Finite Impulse Response) filter or an IIR (Infinite Impulse Response) filter, for example, and changes the frequency characteristics of the input environmental sound.
The filter unit 103 changes the filter coefficient of the digital filter according to the frequency characteristic of the target sound. For example, the filter unit 103 changes the filter coefficient so that the frequency characteristic of the environmental sound is equivalent to the frequency characteristic of the target sound.
The filter unit 103 performs a filtering process on the environmental sound signal from the environmental sound signal output unit 102 using a digital filter in which the filter coefficient is changed, and changes the frequency characteristics of the environmental sound signal. The filter unit 103 outputs the sound signal of the environmental sound whose frequency characteristics are changed to the volume adjustment unit 104.

  The volume adjustment unit 104 acquires the sound information of the target sound from the sound information detection unit 101, and adjusts the volume of the environmental sound acquired from the filter unit 103 based on the acquired sound information. For example, the volume adjustment unit 104 adjusts the volume of the environmental sound so that the volume of the target sound and the volume of the environmental sound have a predetermined volume ratio. The volume ratio between the target sound volume and the environmental sound volume is determined by the distance between the music speaker unit 12 and the environmental sound speaker unit, the expected distance between the listener and the other person, and the listener listening to the target sound. May be arbitrarily determined according to the SNR (Signal-Noise Ratio) allowed when the target sound is received and the SNR allowed when the other person listens to the target sound. The volume adjustment unit 104 outputs the environmental sound whose volume has been adjusted to the amplifier unit 11.

FIG. 4 is a flowchart illustrating an operation example of the control unit 10 in the embodiment.
First, the sound signal acquisition unit 100 of the control unit 10 acquires a sound signal of the target sound (step S10). The sound signal acquisition unit 100 outputs the acquired sound signal of the target sound to the sound information detection unit 101.
Next, the sound information detection unit 101 acquires sound information of the target sound based on the sound signal of the target sound (step S11). The sound signal acquisition unit 100 outputs the detected sound information of the target sound to each of the environmental sound signal output unit 102, the filter unit 103, and the volume adjustment unit 104.
Next, the environmental sound signal output unit 102 outputs an environmental sound signal based on the target sound information (step S12). Further, the filter unit 103 changes the filter coefficient based on the sound information of the target sound, and changes the filter characteristic of the filter (step S13). Further, the volume adjustment unit 104 adjusts the volume of the environmental sound based on the sound information of the target sound (step S14).

  As described above, the speaker device 1 of the present embodiment has a central side with respect to the width direction of the bedding (the horizontal width direction W in FIG. 2) that is the left and right direction of the listener P when the listener P is placed on the bedding. The music speaker unit 12 that outputs the target sound and the position of the music speaker unit 12 with respect to the width direction of the bedding (the horizontal width direction W in FIG. 2) is closer to the end of the bedding. An environmental sound speaker unit 13 that outputs environmental sound, and the other (environmental sound in the present embodiment) based on sound information related to the sound of either one of the target sound or the environmental sound (target sound in the present embodiment). ) Is controlled. As a result, in the speaker device 1 of the present embodiment, the environmental sound speaker unit 13 is disposed closer to the end of the bedding than the music speaker unit 12, so that the control unit 10 can generate sound from both speaker units at the same volume. Is output to the other person outside the bedding, the target sound is heard at a volume lower than the volume of the environmental sound. For this reason, the other person cannot hear the target sound or listens to it in a state where it is buried in the environmental sound, that is, the environmental sound is more dominant than the target sound. Since the environmental sound is a sound that naturally occurs in daily life, when another person listens to the environmental sound, the sound is the sound output from the environmental sound speaker unit 13 or the bedding. It is difficult to distinguish whether the sound naturally occurs in the environment outside the room or the room, and it is highly likely that the sound is recognized as a sound naturally generated in the outside environment. That is, it is possible to prevent the target sound from being felt in the ears of others.

  Further, in the speaker device 1 of the present embodiment, the volume adjustment unit 104 of the control unit 10 controls the volume of the environmental sound based on the volume of the target sound. Accordingly, the volume of the environmental sound can be adjusted with respect to the volume of the target sound, and even if the distance between the listener and the other person is close, the volume of the environmental sound is set to be larger than the volume of the target sound. Thus, it is possible to prevent the target sound from being felt in the ears of others.

  Further, in the speaker device 1 of the present embodiment, the filter unit 103 of the control unit 10 controls the frequency of the environmental sound based on the frequency characteristics of the target sound. When the signal intensity of () is high, the high frequency range of the environmental sound can be emphasized, and the frequency characteristics of the environmental sound are the same as the target sound, so that the target sound is not felt by others. It is possible to

Here, the effect of the speaker apparatus 1 of this embodiment is demonstrated using FIG.
FIG. 5 is a diagram illustrating a relationship between the speaker device 1 and another person in the embodiment. FIG. 5 is a schematic view of the state in which the two beds B1 and B2 are arranged in the horizontal width direction as viewed from the side on which the human head is placed in each bed.

The speaker device 1 of the present embodiment is provided on the right bed B1 in FIG. When the volume of each of the target sound and the environmental sound is equivalent, the SNR for the environmental sound of the target sound that can be heard in the listener's ear is the speaker for music from the ear of the listener P to each speaker unit. It depends on the distance PS1 to the unit 12-2 and the distance PS2 from the ear of the listener P to the environmental sound speaker unit 13-2.
For example, when the width BW of the bed B1 is 90 [cm] corresponding to the width of a general single bed, the distance PS1 is 10 [cm] and the distance PS2 is about 40 [cm]. Conceivable. In this case, the distance ratio of the distance PS2 to the distance PS1 is four times, and the SNR of the target sound that can be heard in the ear of the listener P is +12 [dB]. That is, the target sound can be heard at the listener P's ear at a level 12 [dB] larger than the environmental sound, and the target sound can be heard at a sufficiently large volume compared to the environmental sound, so that the environmental sound is not concerned. Listen to the target sound.

  On the other hand, when the interval PP between the bed B1 and the adjacent bed B2 is 120 [cm], the distance PS3 from the ear of the other person E in the bed B2 to the music speaker unit 12-1 is 200 [cm. The distance PS4 from the ear of the other person E to the environmental sound speaker unit 13-1 is 160 [cm]. In this case, the distance ratio of the distance PS4 to the distance PS3 is 0.8 times, and the SNR of the target sound that can be heard in the ear of the other person E is −1.9 [dB]. That is, the target sound is heard at the listener P's ear at a level 1.9 [dB] smaller than the environmental sound, and the target sound is sufficiently buried compared to the environmental sound. , But almost no target sound. That is, it is possible to prevent the other person's ear from feeling the target sound.

  In addition, the speaker device 1 of the present embodiment is provided at a position between the end of the bedding and the head position T with respect to the width direction W, and a music speaker unit 12-1 that outputs a target sound, and music With respect to the environmental sound speaker unit 13-1 that outputs the environmental sound and the head position T, the horizontal sound direction is provided on the end side with respect to the horizontal width direction W from the position where the speaker unit 12-1 is provided. W is provided at a position symmetrical to the position where the music speaker unit 12-1 is provided, and from the position where the music speaker unit 12-2 for outputting the target sound and the music speaker unit 12-2 are provided. The sound information of the environmental sound is controlled based on the sound information regarding the sound of the target sound and the speaker unit for environmental sound 13-2 that is provided on the end side with respect to the width direction W and outputs the environmental sound With a control unit 10. Thereby, the speaker apparatus 1 of this embodiment can arrange | position the music speaker units 12-1 and 12-2 in the position close | similar to each of a listener's both ears, and can only be heard to a listener's ear. It becomes possible to output the target sound at a small volume. For this reason, it becomes difficult for others to hear the target sound, and even if the target sound is heard by others, the target sound can be easily buried with the environmental sound by adjusting the volume of the environmental sound. It is possible to prevent the sound from being felt in the ears of others more easily.

(Modification 1 of embodiment)
In the above-described embodiment, the case where the control unit 10 controls the environmental sound based on the target sound has been described as an example. However, the present invention is not limited to this, and the control unit 10 can perform the environmental sound based on the target sound. May be controlled. For example, in a hospital or the like, particularly at night, it is not preferable that the target sound and the environmental sound be output at a loud volume that wakes up the sleeping person. Therefore, in this modification, a mode in which the control unit 10 controls the target sound will be described. Below, a different point from embodiment mentioned above is demonstrated, the same code | symbol is attached | subjected to the structure which has the same or similar function as embodiment mentioned above, and the description is abbreviate | omitted.

  In this modification, the mode for controlling the environmental sound in the above-described embodiment is referred to as a “first mode”, and the mode for controlling the target sound in the present modification shown below is referred to as a “second mode”. In the speaker device 1, it is possible to switch between the “first mode” and the “second mode”. The mode in which the speaker device 1 operates may be arbitrarily set according to the environment or time in which the speaker device 1 is provided. For example, the speaker device 1 may be switched manually by an input operation of a manager of a room (for example, a hospital room) in which the speaker device 1 is provided, or may be switched automatically based on time such as day and night. However, when the volume of the target sound or the environmental sound exceeds a predetermined threshold value, the sound may be automatically switched.

FIG. 6 is a block diagram illustrating a configuration example of the control unit 10A according to the first modification of the embodiment.
The environmental sound signal output unit 102 outputs an environmental sound signal to the sound information detection unit 101. The environmental sound signal output unit 102 outputs, for example, predetermined predetermined environmental sound at a signal level corresponding to a predetermined volume. Alternatively, the environmental sound signal output unit 102 acquires the sound signal of the environmental sound input from the outside, and outputs the acquired sound signal.

The sound information detection unit 101 detects sound information such as the volume and frequency characteristics of the environmental sound based on the sound signal acquired from the environmental sound signal output unit 102. The sound information detection unit 101 outputs the detected sound information to each of the filter unit 103 and the volume adjustment unit 104.
The sound signal acquisition unit 100 outputs the target sound signal acquired from the outside to the filter unit 103.
The filter unit 103 changes the filter coefficient of the digital filter according to the frequency characteristics of the environmental sound. The filter unit 103 acquires sound information of the environmental sound from the sound information detection unit 101, and changes the frequency characteristic of the sound signal of the target sound based on the acquired sound information. The filter unit 103 outputs the sound signal of the target sound whose frequency characteristics are changed to the volume adjustment unit 104.

  The volume adjustment unit 104 acquires the sound information of the environmental sound from the sound information detection unit 101, and adjusts the volume of the target sound acquired from the filter unit 103 based on the acquired sound information. For example, the volume adjusting unit 104 may set the volume of the target sound and the volume of the environmental sound to a predetermined volume ratio, and the total value of the volume of the target sound and the environmental sound is equal to or lower than a predetermined volume threshold. Next, adjust the volume of the target sound. As a result, the volume of the target sound is reduced when the volume of the environmental sound is relatively low, and the volume of the target sound does not increase too much even when the volume of the environmental sound is relatively high. The volume adjustment unit 104 outputs the target sound whose volume has been adjusted to the amplifier unit 11.

FIG. 7 is a flowchart illustrating an operation example of the control unit 10A according to the first modification of the embodiment.
First, the environmental sound signal output unit 102 of the control unit 10 outputs an environmental sound signal (step S20). The environmental sound signal output unit 102 outputs the acquired environmental sound signal to the sound information detection unit 101.
Next, the sound information detection unit 101 acquires sound information of the environmental sound based on the sound signal of the environmental sound (Step S21). The sound information detection unit 101 outputs the detected sound information of the environmental sound to each of the filter unit 103 and the volume adjustment unit 104.
Next, the sound signal acquisition unit 100 acquires the sound signal of the target sound and outputs it to the filter unit 103 (step S22). Further, the filter unit 103 changes the filter coefficient based on the sound information of the environmental sound, and changes the filter characteristic of the filter (step S23). Further, the volume adjusting unit 104 adjusts the volume of the target sound based on the sound information of the environmental sound (step S24).

  As described above, in the speaker device 1A according to the first modification of the embodiment, the control unit 10A controls the sound information of the target based on the sound information of the environmental sound. Accordingly, the speaker device 1A according to the first modification of the embodiment can reduce the volume of the target sound even if the volume of the target is equal to or higher than a predetermined volume threshold. It is possible to prevent others from feeling the target sound while suppressing the volume.

In the above-described embodiment and the first modification of the embodiment, the case where the type of sound output from each speaker unit (whether the target sound or the environmental sound) is fixed has been described. It is not limited. The speaker device 1 (1A) may dynamically change the type of sound output from each speaker unit.
In this case, for example, the speaker device 1 includes a plurality (at least three or more) of speaker units arranged in the bed width direction. Then, the control unit 10 outputs a target sound from any of the plurality of speaker units and outputs an environmental sound from any of the speaker units according to the position of the head of the listener placed on the bed. Decide what to do. For example, based on weight information detected from a plurality of strain gauges (not shown) provided in the speaker device 1, the control unit 10 determines the position corresponding to the strain gauge where the largest weight is detected. It is detected as the position of the head. Or you may make it the control part 10 detect the position of a listener's head by analyzing the imaging data acquired from the camera (not shown) which images a listener's attitude | position.
Thus, by dynamically changing the type of sound output from each speaker unit, it is possible to output target sound from the speaker unit closer to the listener's ear.

Note that a program for realizing all or part of the functions of the speaker device 1 in the present invention is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Depending on the situation, the processing may be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices.
The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Speaker apparatus, 10 ... Control part, 11 ... Amplifier part, 12 ... Music speaker unit, 13 ... Environmental sound speaker unit, 100 ... Sound signal acquisition part, 101 ... Sound information detection part, 102 ... Environmental sound signal Output unit, 103... Filter unit, 104.

Claims (7)

In the bedding on which the living body is placed, the first sound is output at a position closer to the center than the end of the bedding with respect to the width direction of the bedding that is the left-right direction of the living body when the living body is placed. A first speaker unit that
A second speaker unit that is provided closer to the end of the bedding than a position where the first speaker unit is provided in the width direction of the bedding and outputs a second sound;
The speaker apparatus which has a control part which controls the sound information of the other sound based on sound information about any one sound of the 1st sound and the 2nd sound. The sound information is information indicating a sound volume,
The speaker device according to claim 1, wherein the control unit controls the volume of the second sound based on the volume of the first sound. The sound information is information indicating frequency characteristics of sound,
The speaker device according to claim 1, wherein the control unit controls the frequency characteristic of the second sound based on the frequency characteristic of the first sound. The sound information is information indicating a sound volume,
The speaker device according to any one of claims 1 to 3, wherein the control unit controls the volume of the first sound based on the volume of the second sound. The sound information is information indicating frequency characteristics of sound,
The speaker device according to any one of claims 1 to 4, wherein the control unit controls the frequency characteristic of the first sound based on the frequency characteristic of the second sound. Position on the side of the head position where the head is placed from the end of the bedding with respect to the width direction of the bedding that is the left-right direction of the living body when the living body is placed in the bedding on which the living body is placed A first speaker unit that outputs a first sound;
A second speaker unit that is provided closer to the end of the bedding than a position where the first speaker unit is provided in the width direction of the bedding and outputs a second sound;
A third speaker unit which is provided at a position symmetrical to the position where the first speaker unit is provided in the width direction with respect to the head position, and which outputs the first sound;
A fourth speaker unit that is provided on an end side with respect to the width direction from a position where the third speaker unit is provided, and outputs the second sound;
The speaker apparatus which has a control part which controls the other said sound information based on the sound information regarding any one sound of said 1st sound and said 2nd sound. In the bedding on which the living body is placed, the first sound is output at a position closer to the center than the end of the bedding with respect to the width direction of the bedding when the living body is placed in the horizontal direction of the living body. A speaker comprising: a first speaker unit; and a second speaker unit that outputs a second sound provided on an end portion side of the bedding from a position where the first speaker unit is provided in the width direction of the bedding. An apparatus control method comprising:
A control method, wherein the control unit controls the sound information of the other sound based on sound information related to one of the first sound and the second sound.

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