JP6264719B2 - Wall-mounted voice utterance device - Google Patents

Description

  The present invention relates to a wall-mounted voice utterance device that can be suitably used as a remote controller for a water heater such as a gas water heater or an electric water heater.

  Conventionally, a remote controller for a hot water supply device having a voice guidance function and an intercom function has been widely used (see, for example, Patent Document 1). In such a conventional remote controller for a hot water supply apparatus, a speaker is provided in a casing, and sound is uttered from the speaker by an output from an intercom circuit, a voice IC circuit for voice guidance, or the like. In addition, the remote control is installed and installed on the wall surface of the kitchen or living room, etc., but in order to ensure the installation workability and the aesthetics after construction, the housing is attached to the wall surface with screws and fixed to the main body unit. On the other hand, there is one constituted by a decorative frame fitted from the front side. In addition, a movable member such as a switch for performing various operations and an opening / closing lid is attached to the casing.

JP 2001-119964 A

  In the above remote controller for hot water supply equipment, the sound from the speaker and the housing or the movable member may vary depending on the situation of each construction site, such as how the decorative frame is fitted, how the main body is attached to the wall, or the rigidity and material of the wall surface. Resonance may cause resonance sound with an unpleasant sound (so-called “billing” sound), and may not be corrected even if an attempt is made to refit the decorative frame.

  Accordingly, an object of the present invention is to reduce a decrease in resonance of a casing or the like due to sound from a speaker by a simple electronic setting operation.

  In order to achieve the above object, the present invention takes the following technical means.

That is, the present invention provides a wall-mounted audio system including a housing attached to a wall surface, a speaker provided in the housing, an audio waveform output unit that outputs an audio waveform signal to the speaker, and a control unit. In the utterance device, the control unit includes a suppression frequency band setting function executable to set a frequency band in which sound pressure should be suppressed among a plurality of frequency bands by a user operation, the voice waveform output unit, the speaker, Is provided with a filter circuit for attenuating signal components in the frequency band set by the control unit among signal components included in the speech waveform signal (Claim 1). ).

  According to the wall-mounted sound generating apparatus of the present invention, the frequency band of the sound uttered from the speaker is divided into a plurality of frequency bands, and the frequency band in which the sound pressure is to be suppressed is selected from the plurality of frequency bands. It can be set by operation, and by making such a setting, a voice waveform signal that is obtained by attenuating the signal component of the set frequency band by the filter circuit is output to the speaker and the sound is uttered. When a resonance noise is generated, etc., each frequency band is sequentially set by the suppression frequency band setting function to check whether the resonance noise is generated or not, which causes the resonance noise at the construction site. Normal use because the frequency band can be easily specified, and after setting, the signal component of the causal frequency band is always attenuated by the filter circuit. It is possible to greatly reduce the occurrence of resonant sound.

In the wall-mounted voice utterance device of the present invention, when the suppression frequency band setting function is started , the user selects and operates at least one (except all) of the plurality of frequency bands. Then, the selected frequency band is determined and set as a frequency band for which sound pressure should be suppressed, and the voice waveform output unit corresponds to the frequency band selected during the execution of the suppression frequency band setting function. The test voice waveform signal to be output is output at the time of the selection operation based on a command signal from the control unit (claim 1). According to this configuration, when one or a plurality of frequency bands are selected by the suppression frequency band setting function, a test voice waveform signal corresponding to the selected frequency band from the voice waveform output unit based on a command signal from the control unit (for example, If the selected frequency band is a frequency band that causes resonance sound, a resonance sound is generated during the above selection operation, and the user immediately selects it at that time. The frequency can be recognized as the cause frequency, and the selected frequency can be set as the suppression frequency. The output of the test speech waveform signal is preferably performed before the suppression frequency band is determined. The suppression frequency band may be confirmed by an explicit user operation such as an operation of a confirmation button, or configured to be confirmed when left for a certain period of time after a frequency band selection operation. May be.

Further, the control is performed so that the selected frequency band is not set as the frequency band in which the sound pressure is to be suppressed when the test speech waveform signal is output until the selected frequency band is determined as the frequency band in which the sound pressure is to be suppressed. It is preferable that the portion is constituted (claim 2 ). According to this, when the test sound waveform signal corresponding to the selected frequency band is output, it is avoided that the test sound waveform signal is attenuated by the filter circuit and the desired sound pressure as the resonance generation test cannot be obtained. it can. Note that “not set” means, for example, that the control unit and the filter circuit are selected in the case of a circuit configuration in which it is indispensable to select and set any one frequency band for audio output. The control unit can be configured to set any one frequency band other than the set frequency band as a frequency band in which the sound pressure should be suppressed. In addition, when the control unit and the filter circuit have a circuit configuration capable of outputting sound without selecting and setting any frequency band, the control unit is configured to cancel all the setting of the frequency band where the sound pressure should be suppressed. You can also

The voice waveform output unit includes storage means for storing a plurality of voice waveform data corresponding to a plurality of voice waveform signals to be output. The plurality of voice waveform data includes a plurality of voice waveforms corresponding to various guidance voices for a user. Guidance voice data and a plurality of test voice waveform data respectively corresponding to the plurality of frequency bands, each test voice waveform data outputting the test voice waveform signal corresponding to the frequency band selected during the selection operation (Claim 3 ). According to this, a test voice waveform signal such as a sweep sound can be obtained by holding the test voice waveform data as a part of the voice waveform data in a voice waveform output unit constituted by a voice IC circuit for voice guidance. The test voice waveform signal of the present invention can be output using a conventional voice IC circuit as it is without the need to add a sine wave conversion circuit or the like for generating the circuit, thereby simplifying the circuit configuration and reducing the cost. Can be planned.

The wall-mounted voice utterance device is preferably a remote control device for remotely operating the hot water supply device (Claim 4 ), and more preferably a remote control device for a hot water supply device with an interphone function. According to this, the remote controller for the hot water supply device can be adjusted at each site so that no resonance sound is generated according to the construction site.

  As described above, according to the wall-mounted sound generating device according to claim 1 of the present application, the frequency band of the sound uttered from the speaker is divided into a plurality of frequency bands, and among these frequency bands, The frequency band where the sound pressure should be suppressed can be set by a user operation, and a voice waveform signal obtained by attenuating the signal component in the set frequency band by the filter circuit is output to the speaker. Therefore, when resonance noise occurs during normal use, etc., each frequency band is sequentially set by the suppression frequency band setting function to check whether resonance noise is generated or not. Can easily identify the frequency band causing the resonance sound in the filter, and after setting, the signal component of the cause frequency band is always attenuated by the filter circuit. Since the can, it is possible to greatly reduce the occurrence of normal use when the resonant sound.

Further, according to the wall-mounted sound generation device according to claim 1 of the present application, when one or a plurality of frequency bands are selected by the user's selection operation , the sound waveform output unit based on the command signal from the control unit Since a test voice waveform signal corresponding to the selected frequency band (for example, a sweep sound signal over the entire selected frequency band) is output from the selected frequency band, if the selected frequency band is a frequency band causing resonance sound, A resonance sound is generated, and the user can immediately recognize that the selected frequency is the cause frequency, and the selected frequency can be set as the suppression frequency.

Further, according to the wall-mounted sound generator according to claim 2 of the present application, when the test sound waveform signal corresponding to the selected frequency band is output, the test sound waveform signal is attenuated by the filter circuit and resonates. It can be avoided that a desired sound pressure as a generation test cannot be obtained.

Further, according to the wall mounted voice generating device according to claim 3 of the present application, the test voice waveform data is provided as a part of the voice waveform data to the voice waveform output unit constituted by a voice IC circuit for voice guidance. By holding, there is no need to add a sine wave conversion circuit or the like for generating a test sound waveform signal such as a sweep sound, and the test sound waveform signal of the present invention can be used by using a conventional sound IC circuit as it is. Thus, the circuit configuration can be simplified and the cost can be reduced.

Moreover, according to the wall-mounted sound generator according to claim 4 of the present application, the remote controller for the hot water supply device can be adjusted at each site so that no resonance sound is generated according to the construction site.

It is a simplified circuit diagram of the audio | voice output circuit of the remote control device for hot-water supply apparatuses with an intercom function which is a wall-mounted audio | voice generator which concerns on one Embodiment of this invention. It is a schematic front view of the remote controller for the hot water supply device. It is a flowchart of the suppression frequency band setting function of the remote controller for the hot water supply device. It is a characteristic graph which shows the relationship between the frequency of the audio | voice output from a speaker, and sound pressure. It is the same characteristic graph when the suppression setting of a low frequency band (50-900 Hz) is performed. It is the same characteristic graph when the suppression setting of a medium frequency band (900-2 kHz) is performed. It is the same characteristic graph when the suppression setting of a high frequency band (2k-5kHz) is performed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG. 2 shows a remote control device for a hot water supply device with an interphone function according to an embodiment of the present invention, and the remote control device includes a housing 1 attached to a wall surface. The housing 1 includes a speaker 2 and a liquid crystal display. The device 3 and a control board (not shown) are incorporated. The housing 1 includes a main body (not shown) in which the speaker 2, the liquid crystal display device 3, and the control board are integrally attached, and a decorative frame 4 that is externally fitted to the main body from the front side. It has. The main body is attached and fixed to the wall surface using wood screws or the like. The decorative frame 4 is attached and fixed to the main body portion by an engaging structure such as a claw portion without using a screw or the like in order to improve the appearance when worn. Various operation buttons 5, 6, and 7 are attached to the decorative frame 4 as movable members, and the buttons 5, 6, and 7 are used to operate switches provided on the front surface of the main body. Note that the structure of the casing 2 is merely an example, and the present invention can be applied to any conventionally known casing structure of the remote controller 1 for a hot water supply apparatus.

  The control board is provided with a microcomputer 8 (control unit) that controls the overall operation of the remote control device. The microcomputer 8 controls input from the various operation buttons 5, 6, and 7 and controls the liquid layer display device 3. Screen output control, audio output control to the speaker 2, communication control with a hot water supply controller (not shown), communication control with other interphone devices (including other interphone function built-in remote control devices), and the like are performed. These various controls are performed by a control program and control data stored in the storage means of the microcomputer 8.

  FIG. 1 shows a schematic circuit configuration diagram of an audio output circuit provided on a control board, and the circuit serves as an audio waveform output unit for outputting an audio waveform signal to a speaker 2 as an interphone circuit 9 and an audio IC. Circuit 10. The intercom circuit 9 transmits / receives digital or analog audio signals to / from other interphone devices via a wired or wireless communication path, and outputs the received audio signals as analog audio waveform signals. The voice IC circuit 10 is mainly composed of a voice IC having a plurality of voice waveform data stored in a built-in memory (storage means). The voice IC circuit 10 converts the voice waveform data designated based on a command signal from the microcomputer 8. Output analog voice waveform signal. A relay circuit 11 for selecting either the intercom circuit 9 or the audio IC circuit 10 is provided. The relay circuit 11 is controlled by the microcomputer 8.

  The output of either the intercom circuit 9 or the audio IC circuit 10 is supplied to the speaker 2 via the relay circuit 11, the filter circuit 12, and the amplifier 13, and the audio corresponding to the audio waveform signal is uttered from the speaker 2. Note that due to the circuit characteristics of the present embodiment, the frequency band of the voice uttered from the speaker 2 is configured to be about 50 Hz to about 5 kHz as shown in FIG.

  The filter circuit 12 changes a frequency characteristic based on a command signal from the microcomputer 8 to thereby change a predetermined frequency band among signal components included in input waveform signals (voice waveform signals) from the voice waveform output units 9 and 10. In the circuit shown in FIG. 1, a plurality of ceramic capacitors C1, C2, and C3 having different capacitances connected in parallel are switched by switching with a switching circuit composed of an FET and a transistor. The frequency band to be selected is configured to be selectable. As an example of the frequency band division, as shown in FIGS. 4 to 7, the low frequency band is 50 to 900 Hz, the middle frequency band is 900 to 2 kHz, the high frequency band is 3 kHz to 2 kHz, and the capacitor C1 is provided. When selected, the signal component in the low frequency band is attenuated as shown in FIG. 5, and when the capacitor C2 is selected, the signal component in the medium frequency band is attenuated as shown in FIG. 6, and when the capacitor C3 is selected. As shown in FIG. 7, the frequency characteristic can be designed so that the signal component in the high frequency band is attenuated. 5 to 7, the characteristic diagram shown in FIG. 4 is indicated by an imaginary line.

  The filter circuit 12 can also have various circuit configurations, and can be divided into two frequency bands or three or more frequency bands, and any one or a plurality (excluding all) selected frequency bands. The circuit components can be configured such that the signal components of the remaining frequency bands are attenuated and the signal strength of the signal components in the remaining frequency band is maintained. Further, the audio waveform output units 9 and 10 and the input unit of the amplifier 13 are directly connected, and a plurality of filters having different pass frequency characteristics that can be selected by the switching element are connected in the middle of the connection, via the selected filter. The signal component of the selected frequency band can be attenuated by flowing the signal component of the selected frequency band to the ground. According to this, all the switching elements are turned off (deselection of the attenuated frequency band). Thus, the signal components in all frequency bands can be supplied to the speaker 2 as they are.

  The microcomputer 8 has a suppression frequency band setting function for setting, by a user operation, a frequency band in which sound pressure should be suppressed among a plurality of frequency bands in which a signal component can be selectively attenuated by the filter circuit 12. A program and data for realizing the function are stored in the storage means of the microcomputer 8.

  The voice waveform data stored in the built-in memory of the voice IC circuit 10 includes a plurality of guidance voice data corresponding to various guidance voices for the user and a plurality of test voices respectively corresponding to the plurality of frequency bands of the filter circuit 12. Waveform data. These guidance voice data and test voice waveform data are encoded by the same encoding method, and are decoded and output by a common decoding circuit. The test voice waveform data is for outputting test voice waveform signals respectively corresponding to a plurality of frequency bands that can be selected by the suppression frequency band setting function of the microcomputer 8. A sweep sound waveform signal (frequency changing sound whose frequency gradually changes with time) can be output.

  FIG. 3 shows an example of a flowchart of the suppression frequency band setting function. Execution of the function is started by predetermined operations of the various operation buttons 5, 6, and 7.

  When the execution of the setting function is started, the microcomputer 8 first switches to the voice IC circuit 10 as a voice waveform output unit by controlling the relay circuit 11 (step S1).

  Next, “low frequency band”, “medium frequency band”, and “high frequency band” are displayed on the liquid crystal display device 3, and any one frequency band is selected by using the various operation buttons 5, 6, and 7. Is selected (step S2).

  When the selection operation is performed, the microcomputer 8 temporarily sets any one frequency band other than the selected frequency band as the suppression frequency band (step S3), and issues a command signal to the filter circuit 12 according to this setting. The output of the audio IC circuit 10 can be supplied to the amplifier 13 via the corresponding capacitor (any one of C1 to C3).

  Next, by outputting a command signal from the microcomputer 8 to the audio IC circuit 10, a test audio waveform signal based on the test audio waveform data corresponding to the selected frequency band is output toward the speaker 2 and swept from the speaker 2. A sound is produced (step S4) and input from the user is waited for (step S5). At this time, since the test voice waveform signal is supplied via the capacitor that attenuates the signal component of the frequency band other than the selected frequency band, the test voice waveform signal is not attenuated and the test is performed with a large sound pressure. Sound can be uttered from the speaker 2. If it is confirmed that the resonance sound is generated in the casing 1 or the like due to the utterance of the test sound, the frequency band selected at this time is the cause of the resonance sound. The frequency band to be suppressed is determined and set by an appropriate determination operation (steps S6 and S7), and the setting function is terminated. When such setting is made, the microcomputer 8 continuously outputs a command signal to the filter circuit 12 so as to select a capacitor corresponding to the set frequency band, and thereafter selectively selects signal components in the frequency band. Remove. Thereby, the signal component of the causal frequency band included in the voice waveform signal output from the interphone circuit 9 or the voice IC circuit 10 is attenuated, so that the case 1 is used when the interphone is used or when the voice IC circuit 10 generates the guidance voice. It is possible to reduce the occurrence of resonance noise such as.

  If not confirmed in step S6, it is determined whether or not an operation for ending the setting operation has been performed (step S8). When the ending operation has been performed, the execution of the suppression frequency band setting function is ended and the ending operation is completed. If not, the process returns to step S2 so that the test of other frequency bands can be performed.

  According to the wall-mounted remote controller for a water heater according to the present embodiment (speech uttering device), an acoustic diagnosis mode can be realized by the suppression frequency band setting function, and any one of the plurality of frequency bands has resonance sound. It can be easily determined whether or not it is caused by the output of the test sound from the audio IC circuit and set as the suppression frequency band. After the suppression frequency band is set, the audio frequency output from the intercom circuit 9 is also the cause frequency band. It is possible to suppress the deterioration of sound quality by maintaining the signal intensity in other frequency bands while attenuating the signal component of the signal to reduce the utterance of the resonance sound. In addition, since a sweep sound for each frequency band is recorded in the voice IC of the voice IC circuit and used for diagnosis, there is no need to add a separate sine wave generation circuit, etc. Reduction can be achieved.

  The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, the intercom circuit 9 can be omitted, and the audio IC circuit 10 can be omitted. The filter circuit 12 may be provided between the amplifier 13 and the speaker 2 or may be built in the amplifier 13.

1 Housing 2 Speaker 8 Microcomputer (Control Unit)
9 Intercom circuit (voice waveform output unit)
10 Voice IC circuit (voice waveform output unit)
12 Filter circuit

Claims (4)

In a wall-mounted voice uttering device comprising a casing attached to a wall surface, a speaker provided in the casing, a voice waveform output unit that outputs a voice waveform signal to the speaker, and a control unit,
The control unit includes a suppression frequency band setting function that can be executed by a user operation to set a frequency band in which sound pressure should be suppressed among a plurality of frequency bands, and between the voice waveform output unit and the speaker A filter circuit for attenuating a signal component in a frequency band set by the control unit among signal components included in the speech waveform signal is provided;
When the execution of the suppression frequency band setting function is started , the user selects and operates at least one of the plurality of frequency bands (excluding all of the frequency bands), and then selects the sound pressure of the selected frequency band. The voice waveform output unit is configured to determine and set a frequency band to be suppressed, and the voice waveform output unit instructs a test voice waveform signal corresponding to a frequency band selected during execution of the suppression frequency band setting function from the control unit. A wall-mounted voice utterance device configured to output at the time of the selection operation based on a signal. In the wall-mounted voice utterance device according to claim 1 , until the selected frequency band is determined as a frequency band in which sound pressure is to be suppressed, the selected frequency band is set as the frequency band in which sound pressure is to be suppressed. A wall-mounted voice utterance device characterized in that the control unit is configured not to be set when a test voice waveform signal is output. 3. The wall-mounted voice utterance apparatus according to claim 1 or 2 , wherein the voice waveform output unit includes storage means for storing a plurality of voice waveform data corresponding to a plurality of voice waveform signals to be output, and the plurality of voices. The waveform data includes a plurality of guidance voice data corresponding to various guidance voices for the user and a plurality of test voice waveform data respectively corresponding to the plurality of frequency bands, and each test voice waveform data is selected during the selection operation. A wall-mounted voice utterance device for outputting the test voice waveform signal corresponding to the frequency band that has been recorded. The wall-mounted voice utterance device according to any one of claims 1 to 3 , wherein the wall-mounted voice utterance device is a remote control device for remotely operating a hot water supply device.

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