JP2011175113A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device that reduces noise without deteriorating input and output sound. <P>SOLUTION: The electronic device comprises: a housing 2; a reproduction processing part 3 for reproducing musical sound data; an output part 4 having a sound emitting surface 4a for outputting musical sound; a driving part 5a for rotatably driving a rotating body 5b; a driving control part 6 for controlling the driving part 5a; and a processing part 7 for processing the musical sound based on the reproduction processing in the reproduction processing part 3 based on the rotational frequency of the rotating body 5b. The housing 2 has an opening 21 where the sound emitting surface 4a is exposed, and a sound guide path 22 formed for guiding the musical sound output from the sound emitting surface 4a to the outside. The driving part 5a is disposed in a predetermined position on the sound guide path 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device that reduces noise.

  2. Description of the Related Art Conventionally, an electronic device described in Patent Document 1 is known as an electronic device having a function of reducing the noise of a motor driving sound. The electronic device described in Patent Document 1 is provided with a speaker for reducing driving sound that becomes noise, and outputs a sound having a phase opposite to that of the frequency of the driving sound from the speaker to cancel the driving sound. As a result, noise is reduced.

Japanese Patent Laid-Open No. 5-98926

  However, in the electronic device described above, for example, when outputting a musical sound such as music, the output sound for canceling the driving sound and the sound output for canceling the driving sound are generated by the sound output for canceling the driving sound. There was a problem that the musical sound deteriorated due to the interference.

  An object of the present invention is to provide an electronic device capable of reducing noise in a state in which a musical tone to be output is hardly deteriorated.

  In order to solve the above-described problems, an electronic device according to the present invention rotationally drives a casing, a reproduction processing unit that reproduces musical sound data, an output unit that outputs a musical sound, and a sound emitting surface. A drive control unit that controls the drive unit, and a processing unit that processes a musical sound based on a reproduction process in the reproduction processing unit based on the number of rotations of the rotating body, The sound emitting surface is exposed, and a sound guide path for guiding the musical sound output from the sound emitting surface to the outside is formed, and the driving unit is located at a predetermined position on the sound guide path. It is characterized by being arranged in.

  Moreover, it is preferable that the said process part performs the process which processes the signal of the said reproduced sound signal based on the information of the frequency of the drive sound when the said drive part is driven.

  The processing is performed when the frequency of the musical sound based on the reproduction processing in the reproduction processing unit matches the frequency of the driving sound of the driving unit, and the processing is performed by the reproduction processing unit. Among the musical sounds based on the processing, it is preferable that the musical sound is processed by changing the frequency of the musical sound applied to the matched frequency to n times.

  In addition, the processing unit performs an addition process of adding the reproduced musical sound signal or the processed musical sound signal and a sound signal having the same frequency and opposite phase as the driving sound. Is preferably characterized.

  In order to solve the above-described problems, an electronic device according to the present invention includes a housing, a reproduction processing unit that reproduces musical sound data, an output unit that has a sound emitting surface for outputting musical sounds, and a rotating body. A drive unit that rotates, a drive control unit that controls the drive unit, and a frequency measurement unit that detects a frequency of a musical sound based on a reproduction process in the reproduction processing unit, wherein the drive control unit includes the output The frequency measuring unit is configured so that the frequency of the driving sound generated by the rotational driving of the rotating body after a predetermined time from the output of the musical sound by the unit is 1 / n times the frequency of the musical sound detected by the frequency measuring unit. The drive unit is controlled based on a detection result, and the housing has an opening through which the sound emitting surface is exposed, and a sound guide path that guides the musical sound output from the sound emitting surface to the outside is formed. The drive unit is configured to transmit the sound guide path. Wherein the of being placed in position.

  In order to solve the above-described problems, an electronic device according to the present invention includes a housing, a reproduction processing unit that reproduces musical sound data, an output unit that has a sound emitting surface for outputting musical sounds, and a rotating body. A drive unit that rotationally drives, a drive control unit that controls the drive unit, and a measurement unit that detects a frequency of a musical sound based on a reproduction process in the reproduction processing unit, wherein the drive control unit includes the measurement unit The rotational speed of the rotating body is controlled based on the frequency of the musical sound detected by the control unit so that the sound generated when the drive unit rotates the rotating body is masked by the output musical sound. The body has an opening through which the sound emission surface is exposed, and a sound guide path is formed to guide the musical sound output from the sound output surface to the outside. It is arrange | positioned in the position of this.

  ADVANTAGE OF THE INVENTION According to this invention, the electronic device which can reduce the noise which the music tone to output cannot deteriorate easily can be provided.

It is a figure which shows a part of housing | casing internal structure of the information processing apparatus which is an example of the electronic device which concerns on this invention. It is a functional block diagram which shows the function of the information processing apparatus which concerns on 1st Embodiment. It is a figure which shows a part of housing | casing internal structure of the information processing apparatus which concerns on 2nd Embodiment. It is a functional block diagram which shows the function of the information processing apparatus which concerns on 2nd Embodiment. It is a functional block diagram which shows the function of the information processing apparatus which concerns on 3rd Embodiment. It is a functional block diagram which shows the function of the information processing apparatus which concerns on 4th Embodiment. It is a figure which shows the frequency characteristic in spectrum masking.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the present embodiment, an example in which the present invention is applied to an information processing apparatus 1 such as a personal computer among electronic apparatuses according to the present invention will be described.

The information processing apparatus 1 includes at least a CPU (not shown), a memory 31, a heat sink 32, a fan device 5, and a speaker 4 (output unit).
The CPU is composed of a central processing unit and controls the entire information processing apparatus.
The memory 31 is composed of, for example, a ROM, a RAM, etc., and stores various data.
The heat sink 32 is configured to be able to dissipate heat from a heat generating component such as a CPU.
The fan device 5 includes a fan 5b (rotating body) that blows air when a motor 5a (driving unit) is rotationally driven. In the present embodiment, the fan device 5 is configured to blow air to the heat sink 32.
The speaker 4 outputs a musical sound reproduced by a DSP 3 (reproduction processing unit) described later. Further, the speaker 4 has a sound emitting surface 4a that is an output portion of a musical sound. In the present embodiment, the musical sound is a sound having a certain frequency that has continued for a certain period of time, and the frequency (pitch) of the music can be recognized. It is defined as including sounds that can be input and output.

Next, the housing structure of the information processing apparatus 1 according to the first embodiment will be described with reference to FIG.
The housing 2 has at least an opening 21 through which the sound emitting surface 4a is exposed, and a sound guide path 22 that guides the musical sound output from the sound emitting surface 4a to the outside is formed. At this time, the fan device 5 is disposed at a predetermined position on the sound guide path 22. In FIG. 1A, the fan device 5 is disposed at a position facing the heat sink 32 with a sound guide path 22 therebetween, and the speaker 4 is disposed at a position with the sound guide path 22 separated from the speaker 4. .
Further, as shown in FIG. 1A, the housing 2 has a first storage portion 23 having an opening 21 and a blower opening 25 across the sound guide path 22 in the present embodiment. 2 storage units 24.
The first storage unit 23 stores the speaker 4 having the sound emitting surface 4 a corresponding to the opening 21, and stores the heat sink 32 in parallel with the speaker 4.
The second storage unit 24 stores the fan device 5 in which the fan 5b is disposed corresponding to the air blowing port 25.
Therefore, in the information processing apparatus 1, as shown in FIG. 1A, by outputting the speaker 4, a musical sound is output to the outside of the apparatus through the sound guide path 22 through the opening 21. Further, in the information processing apparatus 1, by driving the fan device 5, air is blown to the heat sink 32 through the blower opening 25, and the wind warmed against the portion where the heat sink 32 is located The air is exhausted to the outside of the apparatus through the path 22. At this time, the drive sound of the fan device 5 is also output to the outside of the device through the sound guide path 22.

In more detail, the information processing apparatus 1 according to the first embodiment includes the following configuration as shown in FIG.
The information processing apparatus 1 includes a housing 2, a DSP 3, a drive control unit 6, and a processing unit 7. The memory 31 stores musical sound data used for outputting musical sounds.
A DSP (Digital Signal Processing, audio processing unit) 3 reproduces musical tone data stored in the memory 31. Specifically, the DSP 3 reproduces the musical sound data into a signal that can be output from the speaker 4.
The drive control unit 6 determines the rotation speed of the fan 5 b and controls the motor 5 a via the drive circuit 35.

  The information processing apparatus 1 configured as described above reproduces musical tone data by the DSP 3, and the reproduced musical tone data is transmitted to the speaker 4 as a signal. The musical sound transmitted as a signal is output from the speaker 4. In the information processing apparatus 1, when outputting a musical sound from the speaker 4, the processing unit 7 applies a musical sound based on the reproduction process in the DSP 3 based on the rotation speed of the fan 5 b determined by the drive control unit 6. Process to add changes. Specifically, the processing unit 7 performs processing to add a change or the like to the musical tone signal that is reproduced by the DSP 3 and transmitted to the speaker 4.

  As shown in FIG. 1A, the sound emitting surface 4 a of the speaker 4 is exposed to the sound guide path 22 through the opening 21. For this reason, the musical sound processed by the processing unit 7 is output to the outside of the housing 2 through the sound guide path 22. The fan device 5 is arranged at a predetermined position on the sound guide path 22. For this reason, the driving sound generated by driving the motor 5 a is output to the outside of the housing 2 through the sound guide path 22. That is, both the musical sound processed by the processing unit 7 from the speaker 4 and the driving sound from the motor 5 a are output to the outside of the housing 2 through the sound guide path 22. As a result, in the information processing device 1, the processing unit 7 performs processing such as processing by the processing unit 7 in the sound guide path 22 by simultaneously outputting the musical sound from the speaker 4 and driving the fan device 5 (outputting the driving sound). The generated musical sound and the driving sound interfere with each other. As a result, in the information processing apparatus 1, the musical sound processed by the processing unit 7 interferes with the driving sound, so that a musical sound that is easier to hear is output.

  Therefore, in the information processing apparatus 1, the influence of the driving sound that becomes a noise can be reduced by the musical sound processed by the processing unit 7, and the musical sound can be hardly deteriorated.

The processing unit 7 performs a processing process for processing the musical sound signal (basic musical sound) reproduced by the DSP 3 based on the frequency information of the driving sound when the motor 5a is driven. Further, the addition processing unit 8 of the processing unit 7 adds the processed musical sound (processed musical sound) signal and the signal having the same frequency and opposite phase as the driving sound to synthesize the additional musical sound. I do.
The memory 31 stores noise interference data and motor rotation number information data. The noise interference data is drive sound data (including the frequency of the drive sound) corresponding to the case where the motor 5a is driven at a predetermined rotation speed. The motor rotation number information data is the rotation number of the motor 5a, that is, the drive information data of the motor 5a by the drive control unit 6.
Further, the information processing apparatus 1 includes a noise interference data selection unit 33 that selects a frequency corresponding to the number of rotations from the noise interference data.

  In the information processing apparatus 1 configured as described above, when the fan 5b is rotationally driven by the addition processing unit 8 of the processing unit 7 to the frequency signal of the musical sound processed by the processing unit 7 when the musical sound is output. A process of adding a signal of noise interference data (data for outputting a sound having the same frequency as the driving sound and an opposite phase) associated with the frequency of the driving sound is performed. As a result, the processed musical tone and the noise interference musical tone are superimposed to synthesize the additional musical tone.

  As a result, in the information processing apparatus 1, the drive sound that becomes noise is reduced due to the interference between the drive sound and the added musical sound in the sound guide path 22. Therefore, the information processing apparatus 1 can reduce noise in a state where the musical sound is hardly deteriorated.

  In addition, a measurement unit 14 (frequency measurement unit) that detects the frequency level of the musical sound reproduced by the DSP 3 is provided. Further, the processing unit 7 includes a changing unit 10 that changes the frequency level of the musical sound. When the musical sound frequency including the various frequencies reproduced by the DSP 3 detected by the measurement unit 14 includes a musical sound that matches the frequency of the driving sound when the motor 5a is driven, the changing unit 10 Among the musical sounds reproduced by the DSP 3, the processed musical sounds are generated by performing a processing process for changing the frequency level of the matched musical sounds to n times (n is a positive integer of 2 or more).

  In the information processing apparatus 1 configured as described above, even if a sound having the same frequency as that of the musical sound reproduced by the DSP 3 (a driving sound of the motor 5a) is generated, the musical sound to be output is hardly deteriorated. . Therefore, even if the frequency of the musical sound reproduced by the DSP 3 matches the frequency of the driving sound when the motor 5a is driven, the deterioration of the musical sound can be reduced.

  Next, the operation of the information processing apparatus 1 according to the first embodiment will be described. In the present embodiment, a case where music is output from the speaker 4 in a state where the fan device 5 blows air to the heat sink 32 is shown.

  The information processing apparatus 1 receives an output command such as music from the user via the application, and starts generating a musical sound (added musical sound) output from the speaker 4 shown below.

First, the DSP 3 processes and outputs the musical sound data based on the output command.
Next, the measurement part 14 detects the frequency of the musical sound output by DSP3.

  Next, the noise interference data selection unit 33 selects from the noise interference data stored in the memory 31 based on the number of rotations of the motor 5a that is rotationally driven by the drive control unit 6 via the drive circuit 35. Data for noise interference corresponding to the rotational speed of the motor 5a is selected. That is, the noise interference data selection unit 33 obtains the frequency of the driving sound when driving at a predetermined rotation speed (current rotation speed of the motor 5a) from the noise interference data.

Next, the processing unit 7 compares and determines the frequency of the musical sound detected by the frequency measuring unit 14 and the frequency of the driving sound acquired by the noise interference data selection unit 33. In the comparison result, when the frequency of the basic musical tone detected by the frequency measuring unit 14 and the frequency of the driving sound acquired by the data selection unit 33 for noise interference match, the change unit 10 of the processing unit 7 matches the frequency. The processing is performed to change only the frequency level of the musical tone applied to the selected frequency to n times the frequency of the original musical tone that matched.
Thereafter, the signal of the frequency of the noise for noise interference for reducing the driving sound acquired by the data selector for noise interference 33 is added to the signal of the frequency of the processed musical sound processed by the addition processing unit 8 of the processing unit 7. Is added to synthesize the added musical tone.

  In addition, in the comparison result, when the frequency of the musical sound detected by the frequency measurement unit 14 does not include the frequency of the driving sound acquired by the noise interference data selection unit 33, the addition processing unit 8 of the processing unit 7 Then, the frequency signal of the noise interference musical sound for reducing the drive sound acquired by the noise interference data selection unit 33 is added to the signal of the basic musical sound frequency.

  Next, the speaker 4 outputs an added musical sound obtained by adding the signal of the driving sound frequency to the signal of the musical sound frequency by the processing unit 7. Specifically, the musical sound (added musical sound) added by the processing unit 7 is output from the sound emitting surface 4a of the speaker 4 toward the sound guide path 22 as shown in FIG.

  By operating as described above, in the information processing apparatus 1, when the added musical sound is output, the noise interference musical sound that is synchronized with the driving sound of the motor 5 a is interfered. Therefore, in this embodiment, even if a musical sound is output while driving the motor 5a, the noise can be reduced in a state where the musical sound is hardly deteriorated.

  Further, in this embodiment, when the frequency of the musical sound and the frequency of the driving sound match, since the processing for processing the frequency of the matched musical sound to n times is performed, the musical sound is unlikely to deteriorate. In this state, a musical sound can be output from the housing 2.

  In the present embodiment, as shown in FIG. 1A, the fan 5b is disposed on the device outlet side of the sound guide path 22 and the speaker 4 is disposed on the inner side of the device, that is, from the back of the drive sound. Although the musical sound is configured to be output, the present invention is not limited to this. For example, as shown in FIG. 1B, the speaker 4 is arranged on the device exit side of the sound guide path, and the fan 5b is arranged on the inside of the device, that is, driving sound is output from the back of the musical sound. It may be configured.

  Next, a second embodiment will be described with reference to FIGS. About 2nd Embodiment, a different point from 1st Embodiment is mainly demonstrated, the same code | symbol is attached | subjected about the structure similar to 1st Embodiment, and description is abbreviate | omitted. For the points that are not particularly described in the second embodiment, the description of the first embodiment is applied as appropriate.

In more detail, the information processing apparatus 1 according to the second embodiment includes the following configuration.
The information processing apparatus 1 includes a microphone 11 (sound collecting unit) that collects driving sound of the motor 5a. The input sound collected from the microphone 11 is input via the amplifier 34.
In the information processing apparatus 1, the drive control unit 6 controls the motor 5 a based on the input sound collected by the microphone 11. In addition, the information processing apparatus 1 includes an input processing unit 38 that performs input processing on an input result (microphone sound) from the microphone 11. The sound input from the microphone 11 by the input processing unit 38 is stored in the memory 31.

  In the information processing apparatus 1 configured as described above, when the input sound is input by the microphone 11, the drive control unit 6 rotates the rotational speed of the fan 5 b based on the input sound collected by the microphone 11. The motor 5a is controlled to drive.

  Therefore, in the information processing apparatus 1, since it is possible to avoid the input sound from being deteriorated by the drive sound when the drive sound that becomes noise interferes with another input sound (input sound), the drive Sound does not interfere with input. Therefore, in the information processing apparatus 1, it is possible to reduce deterioration of input sound even when input is performed in driving the motor 5a.

  Further, the information processing apparatus 1 includes a filter 12 (HPF 12A, LPF 12B) that blocks a predetermined frequency band. The HPF (High-Pass Filter) 12A is a filter 12 that passes high frequency well and does not pass a band of a frequency lower than the cutoff frequency. The LPF (Low-Pass Filter) 12B is a filter 12 that passes a low frequency well and does not pass a band of a frequency higher than the cutoff frequency. In addition, the drive control unit 6 can control the fan device 5 so that the frequency of the drive sound becomes a rotational speed belonging to a predetermined frequency band that can be cut off by the filter 12. In the information processing apparatus 1 configured as described above, when the input sound is input by the microphone 11, the rotation number belonging to a predetermined frequency band in which the frequency of the drive sound can be cut off by the filter 12 is determined by the drive control unit 6. In order to control the drive of the fan 5b, the filter 12 can cancel the drive sound that becomes noise. As a result, the information processing apparatus 1 can reduce the intrusion of drive sound that is noise to the input sound input from the microphone 11.

  Next, the operation of the information processing apparatus 1 according to the second embodiment will be described. In the present embodiment, first, the information processing apparatus 1 shows a case where voice is input through the microphone 11 while the fan apparatus 5 is driven. Note that the frequency of the input audio is between 300 Hz and 4000 Hz in the present embodiment.

  The information processing apparatus 1 receives a recording command from the user via the application, and starts an operation of inputting sound (input sound) from the microphone 11 shown below.

  First, the drive control part 6 controls the rotation speed of the fan 5b based on the frequency (300 Hz to 4000 Hz) of the input sound. In the present embodiment, the drive control unit 6 controls the rotation speed of the fan 5b so that the frequency of the drive sound of the fan 5b is less than 300 Hz. Thereby, the fan 5b is controlled to a predetermined rotation speed, and the frequency of the driving sound is less than 300 Hz.

  Next, in the information processing apparatus 1, voice is input by the user via the microphone 11. When the voice is input, the driving sound of the motor 5a is also input from the microphone 11 through the amplifier 34 simultaneously with the voice.

The input sound (sound and driving sound of the fan 5b) input from the microphone 11 is blocked from the input sound in a predetermined frequency band by the HPF 12A. Specifically, in the HPF 12A, an input sound only of a sound in which the driving sound of the motor 5a having a frequency of less than 300 Hz is cut off is input.
And the input process part 38 inputs the input sound from HPF12A. In other words, the input processing unit 38 receives input sound of only the sound (assumed sound frequency band) in which the driving sound of the fan 5b is canceled.

  Further, in the present embodiment, when a musical sound is output from the speaker 4, the input sound from the LPF 12B is detected by the measurement unit 14, and noise interference data is generated based on the detected frequency. Based on the generated noise interference data, processing and addition processing in the processing unit 7 are performed.

  By configuring in this way, unlike the first embodiment, the processing unit 7 uses the frequency of the driving sound to be actually driven without using the noise interference data (the frequency of the driving sound assumed from the rotation speed). The amount of frequency addition, that is, the amount of noise cancellation can be determined.

  In the present embodiment, the drive control unit 6 controls the frequency of the drive sound of the motor 5a to be less than 300 Hz, but is not limited thereto. For example, the drive control unit 6 can perform control so that the frequency is higher than the audio frequency (300 Hz to 4000 Hz) in the present embodiment. In such a configuration, a signal having a frequency less than 4000 Hz cut by the LPF 12B may be used as a drive sound, and a signal having a frequency cut by 4000 Hz or more by the HPF 12A may be input as an input sound.

  Next, a third embodiment will be described with reference to FIG. About 3rd Embodiment, a different point from 1st and 2nd embodiment is mainly demonstrated, the same code | symbol is attached | subjected about the structure similar to 1st and 2nd embodiment, and description is abbreviate | omitted. For the points that are not particularly described in the third embodiment, the descriptions for the first and second embodiments are applied as appropriate.

The information processing apparatus 1 according to the third embodiment is disposed between the measurement unit 14 (frequency measurement unit) and the drive control unit 6, delays the result detected by the measurement unit 14 for a predetermined time, and drives the drive control unit 6. A delay processing unit 13 is provided.
Further, the drive control unit 6 detects the frequency of the driving sound of the motor 5a by the measurement unit 14 (frequency measurement unit) based on the detection result of the measurement unit 14 that is input from the delay processing unit 13 with a predetermined time delay. The motor 5a is controlled to be 1 / n times the frequency of the musical tone (n is a positive integer of 2 or more).

  In the information processing apparatus 1 configured as described above, the delay processing unit 13 that delays the result detected by the measurement unit 14 for a predetermined time and inputs the result to the drive control unit 6 includes the measurement unit 14 and the drive control unit 6. Arranged between. That is, the drive control unit 6 controls the motor 5a after a predetermined time delay. The drive control unit 6 controls the motor 5a so that the drive sound of the motor 5a becomes 1 / n times the frequency of the musical sound detected by the measurement unit 14 when the delay processing unit 13 performs processing. . As a result, the user can hear the driving sound of the motor 5a with a slight delay from the musical sound. At this time, since the driving sound is 1 / n times the frequency of the musical sound, the user will have a pre-dance effect, making it difficult to hear the driving sound. Therefore, the information processing apparatus 1 can reduce the driving sound that becomes noise while the musical sound is hardly deteriorated.

  The pre-dance effect is one of the human auditory characteristics. When the first part of the sound (harmonic) enters, the analysis begins immediately, but the latter part (fundamental wave) that enters immediately after that. Is masked, making it difficult to hear even if it reaches the ear. In the present embodiment, using this effect, the fan device 5 is controlled so that this effect is exhibited by using the beginning of the sound as a musical sound and the latter half as a driving sound.

  Further, the delay time by the delay processing unit 13 is a time required for exhibiting the pre-dance effect, and is set, for example, between 1 and 30 msec after the musical sound is output from the speaker 4. The

  Next, the operation of the information processing apparatus 1 according to the third embodiment will be described. In the present embodiment, first, a case where music is output from the speaker 4 in a state where the fan device 5 blows air to the heat sink 32 is shown.

  The information processing apparatus 1 receives a music output command from the user via the application, and starts an output operation of music output sound from the speaker 4 shown below.

First, the DSP 3 processes and outputs the musical sound data based on the output command.
Next, the speaker 4 outputs a musical sound via the amplifier 34. In this embodiment, a musical tone having a frequency of 1000 Hz is output. When the musical sound is output from the speaker 4, the delay processing unit 13 performs a delay process for delaying the result detected by the measurement unit 14 for a predetermined time. That is, the delay processing unit 13 starts counting to input the result detected by the measurement unit 14 to the drive control unit 6.

  Next, the measurement part 14 detects the frequency of the musical sound output by DSP3. In the present embodiment, a frequency of 1000 Hz is detected.

  Next, the drive control unit 6 is a fan in which the frequency of the driving sound is 1 / n times (1/10 times in this embodiment) the frequency of the musical sound based on the frequency of the musical sound detected by the measuring unit 14. The rotational speed of 5b is determined. Specifically, since the frequency of the musical sound is 1000 Hz, the drive control unit 6 determines the rotation speed of the fan 5b having a driving sound frequency of 100 Hz that is 1/10 times the frequency of the musical sound.

  Next, the delay processing unit 13 inputs the drive control unit 6 after a predetermined time has elapsed. Note that the time from the output of the musical sound counted by the delay processing unit 13 is determined in consideration of the time during which the pre-dance effect can be exhibited.

  Next, the drive control unit 6 that has received the input from the delay processing unit 13 determines that the frequency of the drive sound is 1 / n times the frequency of the musical sound based on the frequency of the musical sound detected by the measurement unit 14 of the motor 5a. Control to be. Specifically, the drive control unit 6 controls the motor 5 a so that the drive sound has a frequency of 100 Hz after the delay processing from the delay processing unit 13.

  In the present embodiment that operates as described above, when a musical tone is output, the frequency is 1 / n times the frequency of the musical tone that is lower than the musical tone output by the drive control unit 6 after a predetermined time has elapsed. The motor 5a is controlled so that the driving sound is as follows.

  For this reason, the user who listens to the musical sound output from the speaker 4 hears the beginning of the audible sound, that is, the musical sound, and then after the predetermined time has elapsed, the motor 5a has a frequency that is lower than the musical sound frequency. Since the driving sound can be heard, it becomes difficult for the user to hear the driving sound of the motor 5a due to the pre-dance effect.

  Therefore, in the information processing apparatus 1, it is possible to reduce the driving sound of the motor 5a that becomes noise. Further, in the information processing apparatus 1, noise can be reduced by controlling the motor 5a without changing the musical sound.

  Further, in the present embodiment, when a sound or the like is input by the microphone 11, the equalizer 12C cuts off based on the frequency of the driving sound determined by the rotational speed of the fan 5b that is driven to rotate by the drive control unit 6. Determine the frequency band to be used.

  With this configuration, in the present embodiment, when sound or the like is input from the microphone 11, the drive sound is blocked by the equalizer 12C, and therefore only the sound or the like is input. For this reason, in this embodiment, the drive sound of the motor 5a which becomes noise from the input sound from the microphone 11 can be reduced.

  Next, a fourth embodiment will be described with reference to FIGS. Regarding the fourth embodiment, the differences from the first to third embodiments will be mainly described, the same reference numerals are given to the same configurations as those of the first to third embodiments, and the description will be omitted. For the points that are not particularly described in the fourth embodiment, the descriptions of the first to third embodiments are applied as appropriate.

In the information processing apparatus 1 according to the fourth embodiment, the measurement unit 14 is configured to be able to detect the frequency and sound pressure level of a musical sound (basic musical sound) reproduced by the DSP 3. In addition, as shown in FIG. 7, when a signal having a predetermined frequency of a musical sound is output at a predetermined sound pressure level, the memory 31 corresponds to the relationship between the frequency of the signal masked by the signal and the sound pressure level. The attached table (critical band data) is stored.
Further, the drive control unit 6 refers to the table based on the frequency and sound pressure level of the musical sound detected by the measurement unit 14, and the sound generated when the motor 5a rotates the fan 5b is generated by the basic musical sound. The rotational speed of the fan 5b is determined so as to be masked, and the motor 5a is controlled.
Further, the information processing apparatus 1 includes an equalizer 12C that functions as a filter 12 that can change a frequency that can be cut off.

  When the sound pressure level is detected and a signal having a predetermined frequency is output at a predetermined sound pressure level, the information processing apparatus 1 configured as described above has the frequency and sound pressure level of the signal masked by the signal. The motor 5a is controlled so that the frequency is within the critical band determined based on the value of the critical band data associated with the relationship. As a result, it is difficult for the user to hear the drive sound due to the spectrum masking effect. Therefore, in the information processing apparatus 1, it is possible to reduce the driving sound that becomes noise while the musical sound is hardly deteriorated.

  The spectrum masking effect is one of human auditory characteristics. When one sound is heard while another sound is heard, the second sound is erased (masked) by the first sound. The effect is that it cannot be heard. As shown in FIG. 7, the range of sound to be masked differs depending on the sound pressure and frequency. For example, when a sound of 1 kHz is emitted, the sound in the range indicated by hatching (between 0.5 kHz and 4 kHz) in FIG. 7 is masked. The shape of the spectrum masking curve varies depending on the frequency, and the curve shape varies depending on the sound pressure. The curve generated by masking has a shape like a band-pass filter, and a range corresponding to the pass bandwidth of the filter 12 is called a critical band.

  Next, the operation of the information processing apparatus 1 according to the fourth embodiment will be described. In the present embodiment, first, a case where music is output from the speaker 4 in a state where the fan 5b blows air to the heat sink 32 is shown.

  The information processing apparatus 1 receives a music output command from the user via the application, and starts a musical sound output operation from the speaker 4 shown below.

First, the DSP 3 processes and outputs the musical sound data based on the output command.
Next, the measurement unit 14 detects the sound pressure level of the output musical sound.
Next, the drive control unit 6 refers to the critical band data in the memory 31 based on the detection result of the measurement unit 14, and the value of the critical table associated with the critical band data (the value of the frequency within the critical band). The motor 5a is controlled so as to have the frequency of the driving sound of the motor 5a.
Specifically, in the present embodiment, as shown in FIG. 7, the frequency within the critical band in spectrum masking is determined based on the frequency of the musical sound detected by the measurement unit 14. For example, when the frequency of the musical sound is 100 Hz, a frequency within a range from 50 Hz to around 400 Hz is determined as indicated by hatching in FIG.
Next, the speaker 4 outputs a musical tone based on the reproduced musical tone.

In this embodiment that operates as described above, when a musical sound is output, a frequency that is difficult for the user to hear is determined by a spectrum masking effect based on the detected frequency of the musical sound. Then, since the drive control unit 6 rotationally drives the fan 5b at a rotation speed so as to achieve the determined frequency, the user is less likely to hear the driving sound of the fan 5b that becomes noise due to the spectrum masking effect.
Therefore, in the information processing apparatus 1, it is possible to reduce the driving sound that becomes noise while the musical sound is hardly deteriorated.

  Further, in the present embodiment, when a sound or the like is input by the microphone 11, the equalizer 12C cuts off based on the frequency of the driving sound determined by the rotational speed of the fan 5b that is driven to rotate by the drive control unit 6. Determine the frequency band to be used.

  With this configuration, in the present embodiment, when sound or the like is input from the microphone 11, the drive sound is blocked by the equalizer 12C, and therefore only the sound or the like is input. For this reason, in this embodiment, the drive sound of the fan 5b which becomes noise from the input sound from the microphone 11 can be reduced.

  As mentioned above, although preferred embodiment was described among the electronic devices which concern on this invention, it can implement with a various form, without being limited to embodiment mentioned above.

  In the first to fourth embodiments, the example applied to the information processing apparatus 1 has been described as an example of the electronic apparatus. However, the present invention is not limited to this. The present invention can also be applied to an electronic device such as a mobile terminal, and can be applied to, for example, a mobile phone. When applied to a mobile phone, a receiving speaker or a speaker used for incoming calls or the like can be used as a tone output unit. In addition, a microphone for transmission can be used as the microphone 11 in the present embodiment, and it is not necessary to newly provide a microphone, and it can also be used. In addition, by driving a vibrator as a drive unit that generates a drive sound, the drive sound of the vibrator can be obtained even when the drive of the vibrator and the output such as the transmission or the incoming call or the input of the reception or recording are performed simultaneously. It is possible to provide a transmission sound, a ringtone, etc. with reduced (noise).

1 Information processing equipment (electronic equipment)
2 Housing 3 DSP (Reproduction processing unit)
4 Speaker (output unit)
4a Sound emitting surface 5a Motor (drive unit)
5b Fan (Rotating body)
6 Drive control unit 7 Processing unit 11 Microphone (sound collecting unit)
13 Delay processing unit 14 Measurement unit (frequency measurement unit)
21 opening 22 sound guide path

Claims (6)

A housing,
A playback processor for playing back music data;
An output unit having a sound emitting surface for outputting musical sounds;
A drive unit for rotationally driving the rotating body;
A drive control unit for controlling the drive unit;
A processing unit for processing a musical sound based on the reproduction processing in the reproduction processing unit based on the number of rotations of the rotating body,
The housing has an opening through which the sound emitting surface is exposed, and a sound guide path that guides the musical sound output from the sound emitting surface to the outside is formed.
The electronic device is characterized in that the drive unit is disposed at a predetermined position on the sound guide path.   2. The electronic device according to claim 1, wherein the processing unit performs a processing process for processing the reproduction-processed musical sound signal based on information on a frequency of a driving sound when the driving unit is driven. 3. machine. The processing is performed when the frequency of the musical sound based on the reproduction processing in the reproduction processing unit matches the frequency of the driving sound of the driving unit,
The processing process is a process of processing a musical sound by changing a frequency of the musical sound applied to a matched frequency to n times among musical sounds based on the reproduction processing in the reproduction processing unit. 2. The electronic device according to 2.   The processing unit performs an addition process of adding a musical sound signal based on the reproduction process or the processed musical sound signal and a sound signal having the same frequency and opposite phase as the driving sound. The electronic device according to claim 2 or 3. A housing,
A playback processor for playing back music data;
An output unit having a sound emitting surface for outputting musical sounds;
A drive unit for rotationally driving the rotating body;
A drive control unit for controlling the drive unit;
A frequency measurement unit that detects the frequency of the musical sound based on the reproduction processing in the reproduction processing unit,
In the drive control unit, the frequency of the driving sound generated by the rotational driving of the rotating body after a predetermined time from the output of the musical sound by the output unit is 1 / n times the frequency of the musical sound detected by the frequency measuring unit. And controlling the drive unit based on the detection result of the frequency measurement unit,
The housing has an opening through which the sound emitting surface is exposed, and a sound guide path that guides the musical sound output from the sound emitting surface to the outside is formed.
The electronic device is characterized in that the drive unit is disposed at a predetermined position on the sound guide path. A housing,
A playback processor for playing back music data;
An output unit having a sound emitting surface for outputting musical sounds;
A drive unit for rotationally driving the rotating body;
A drive control unit for controlling the drive unit;
A measurement unit that detects the frequency of the musical sound based on the reproduction processing in the reproduction processing unit,
The driving control unit is configured to cause the sound generated when the driving unit rotates the rotating body based on the frequency of the musical sound detected by the measuring unit to be masked by the output musical sound. Control the rotation speed of
The housing has an opening through which the sound emitting surface is exposed, and a sound guide path that guides the musical sound output from the sound emitting surface to the outside is formed.
The electronic device is characterized in that the drive unit is disposed at a predetermined position on the sound guide path.

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