JP2006033734A - Sound inspection method and device of electric product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound inspection device of an electric product to inspect that, for example, a receipt sound, or the like of received melody, or the like is reproduced accurately from a speaker of the electric product. <P>SOLUTION: A reference sound signal D1 is made by carrying out positive/negative inversion transformation of volume level of sound signal stored at a memory unit in negative direction in which a silent level is zero. Then, an inspection sound signal D2 is made by carrying out the positive/negative inversion transformation of volume level of sound signal outputted by electric product S and collected with sound collecting microphone 3 in negative direction in which a silent level is zero. A threshold Sth0 is set for recognizing sound as silence. When a sound signal more than the threshold Sth0 is detected in the inspection sound signal D2, the reference sound signal D1 and the inspection sound signal D2 are compared with time, and time duration is accumulated until difference of volume values of the reference sound signal D1 and the inspection sound signal D2 becomes more than predetermined. When the accumulated value becomes more than a previously set threshold for determination, inconsistency is determined. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention implements an electrical product sound inspection method and an electrical product sound inspection method for inspecting that, for example, a ringtone such as a received melody is accurately reproduced from a speaker of the electrical product. The present invention relates to a sound inspection apparatus for an electrical product suitable for performing.

  Recently, as an information terminal such as a mobile phone or other electrical products, it is possible to download (record), for example, a ringtone other than a normal DTMF sound from a ringtone melody site and use it as a ringtone. There are a wide variety of products that have been made.

  Before such electronic products are shipped from the factory, a quality test is performed to determine whether information terminals such as mobile phones and other electric products can accurately reproduce ringtones such as recorded ringtones. ing.

By the way, as a method of comparing whether or not two audio signals are the same, those obtained by collecting each audio signal by a sound collecting microphone are input to an oscillator, and the recorded amplitude of the oscillator is overlapped, Such things as displaying in parallel are usually performed.
Utility Model Registration No. 3046906 Japanese Patent Laid-Open No. 5-34391 JP-A-8-123454 JP 2002-372968 A

  However, when comparing whether or not the two audio signals are the same, when the recorded amplitude of the oscillator is used as it is, when comparing the recorded amplitudes of the two audio signals and performing the comparison, If the audio signal is compared and synchronized, there is no problem, but if it is not synchronized, for example, when the amplitude of one audio signal swings to the “positive” side, centering on silence, When the amplitude of the other audio signal swings to the “negative” side centering on silence (FIG. 3 is a diagram showing that the amplitude swings positively and negatively centering on silence), the difference between these is obtained. In practice, it is determined that the two audio signals are significantly different, even though the two audio signals are the same or very similar.

  In addition, when two audio signals are superimposed or displayed in parallel, whether or not the two audio signals are the same is determined by visual inspection, or the size and shape are recognized and whether or not they are the same. There is a problem that a voice recognition system for judging is required.

  On the other hand, when a situation occurs in which a product that cannot reproduce ringtones and other voice information occurs, such a product becomes a defective product in the market, so such a defective product is not sent to the market. Therefore, it is possible to perform quality / reliability tests, such as whether or not the recorded ringtone and other voice information can be accurately reproduced, by an unmanned machine. Development of sound inspection equipment is desired.

  The present invention has been made in order to solve the above-described problems, and it is possible to accurately reproduce ringtones and other audio information recorded by electrical products before shipping from the factory. Product quality / reliability tests can be performed by an unmanned machine, and the playback time of ringtones and other audio information recorded by the electric appliances to be compared is shifted. Regardless of whether the two audio signals are significantly different, even though they are the same or very close, and the ringtones and other audio information recorded by the appliance operates normally. An object of the present invention is to provide a sound inspection method for an electrical product that is not recognized as a defective product, and a sound inspection device for an electrical product suitable for carrying out the sound inspection method for the electrical product. Toi .

The electrical product sound inspection method according to claim 1, wherein the electrical product for determining the coincidence / non-coincidence of the audio signal to be inspected by checking the coincidence between the reference audio signal and the audio signal to be inspected over time. In this method, the volume of the reference audio signal is converted to a positive or negative reversal of either the positive or negative direction with the silence level set to zero, and the target audio is detected. The sound volume value is set to zero, the silence level is zero, and the same direction as the reference audio signal, the positive or negative direction is converted to positive or negative, and the test audio signal is obtained.
The time during which the difference between the volume values of the reference audio signal and the inspection audio signal is greater than or equal to a predetermined value is accumulated, and when the accumulated value is greater than or equal to a predetermined determination threshold, it is determined that there is a mismatch.

  According to a second aspect of the present invention, there is provided a sound inspection method for an electrical product, wherein the soundless threshold value for recognizing silence as in the sound inspection method for an electrical product according to the first aspect is set to a volume, and a volume value of a reference audio signal is set. After a positive / negative reversal conversion in either the positive direction or the negative direction with a silence level of zero, a reference audio signal and an inspection audio signal are detected when an audio signal exceeding the silence threshold is detected in the inspection audio signal. The comparison was started over time.

  4. The electrical product sound inspection apparatus according to claim 3, wherein the electrical product determines whether or not the audio signal to be inspected matches / disagrees by checking the coincidence of the reference audio signal and the audio signal to be inspected over time. A sound collection device that collects a sound signal output from a speaker provided in an electrical product, a storage unit that stores a sound signal collected by the sound collection microphone, and a storage unit The volume value of the stored audio signal is provided with positive / negative / reverse conversion means for converting positive / negative / reverse conversion in either the positive direction or the negative direction with the silence level set to zero. The volume value of the audio signal that reproduces the audio signal such as the recorded ringtone is the reference audio signal obtained by converting either the positive or negative direction with the silence level set to zero, and then the reference audio signal. Use to record voices such as recorded ringtones The volume value of the audio signal from which the signal is reproduced is set to zero, the silence level is set to zero, and the positive or negative conversion of either the positive direction or the negative direction is performed in the same direction as the reference audio signal. The time when the difference between the sound volume value and the inspection audio signal is greater than or equal to a predetermined value is accumulated, and when the accumulated value is greater than or equal to a predetermined threshold for determination, it is determined that there is a mismatch.

  According to a fourth aspect of the present invention, there is provided an electric product sound inspection apparatus, wherein the electric product sound inspection apparatus according to the third aspect is configured to set a silent threshold value for recognizing silence as volume, Silence threshold means set by the silence threshold means in the inspection voice signal after the positive or negative conversion of either the positive or negative direction with the silence level set to zero. When the above audio signals are detected, the comparison between the reference audio signal and the inspection audio signal is started over time.

  According to a fifth aspect of the present invention, there is provided an electrical product sound inspection apparatus comprising: storage means for storing information for calling a sound information site to be recorded, of the electrical sound inspection apparatus according to the third or fourth aspect; It further comprises external input means input operation means for inputting information for calling the stored sound information site to the external input means of the electrical product.

  In the sound inspection method for an electrical product according to claim 1, the amplitude that swings to the positive side and the negative side with the silent state as the center is used as it is for the inspection of coincidence / mismatch of the reference sound signal and the sound signal to be inspected. Rather than making a comparative decision over time so that the reference audio signal that was received and the test audio signal that uses the amplitude that swings positively and negatively, centered on the silent state, are synchronized or substantially synchronized The volume of the recorded audio signal is converted to either the positive or negative direction with the silence level set to zero, and this is used as the reference audio signal, and then the speaker of the electrical product. Check that volume level of ringtone and other audio signals output from is converted to positive or negative direction in the same direction as the reference audio signal converted to either positive or negative direction with silence level zero Synchronize or substantially synchronize audio signal As such, over time, and to compare determined.

  As a result, when this sound inspection method for electrical products is used, the two sound signals of the reference sound signal and the inspection sound signal are not synchronized and are reproduced with a slight shift (substantially synchronized). Even if there is a sound, the ringtone and other audio information recorded by the electrical product is checked to see if it can be played back accurately. As in the case where the reference audio signal used as it is and the inspection audio signal output from the oscillator and using the amplitude swinging to the positive side and the negative side centered on the silent state are not synchronized and a slight deviation occurs. In fact, even though the two audio signals are the same or very similar, there is no determination that the two audio signals are significantly different.

  By the way, when the volume value of the reference audio signal is converted from positive / negative / reverse to either the positive or negative direction with the silence level set to zero, it is actually from the silence level defined as zero to the positive or negative value. A sound level of a predetermined height is detected in either direction.

  Therefore, for example, in this sound inspection method for electrical products, a threshold (silence threshold) for recognizing as silence is set, and a sound signal such as a recorded ringtone is reproduced using the electrical product. When the audio signal equal to or higher than the threshold for recognizing silence (threshold for silence) is detected, the reference audio signal and the inspection audio signal are compared over time, and the volume values of the reference audio signal and the inspection audio signal are compared. If the time when the difference is greater than or equal to a predetermined value is accumulated, and the accumulated value is equal to or greater than a predetermined threshold for determination, the electric product is determined to be defective. Are superimposed or displayed in parallel, it is not necessary to visually check whether the two audio signals are the same.

  In other words, if this sound inspection method for electrical products is used, a quality / reliability test can be performed by an unmanned machine whether or not ringtones and other audio signals recorded by the electrical products can be accurately reproduced. In addition, if you use the sound inspection method for electrical appliances, you can recognize the size and shape of the ringtones recorded by the electrical appliances, etc. without using a complicated and advanced speech recognition system that makes it possible to determine whether or not they are the same. The quality / reliability test of whether or not the audio signal can be accurately reproduced can be performed by an unmanned machine.

  In the sound inspection method for an electrical product according to claim 2, the soundless threshold value for recognizing as silence is set to volume, and the volume value of the reference audio signal is set to be positive or negative with the silence level set to zero. After either one is converted into positive or negative, the reference audio signal and the inspection audio signal are started to be compared over time when an audio signal equal to or greater than the silent threshold is detected in the inspection audio signal.

  When the volume level of the reference audio signal is converted from positive or negative to either the positive or negative direction with the silence level set to zero, the actual sound level is actually changed from the silence level defined as zero to the positive or negative direction. A sound level having a predetermined height is detected in either one of them.

  On the other hand, in order to inspect whether an electrical product can accurately reproduce a ringtone such as an incoming melody with high accuracy and high reliability, the reference audio signal and the inspection audio signal are synchronized as much as possible. Thus, in order to start the comparison over time, it is preferable to set a silence threshold for recognizing as silence corresponding to a silence level defined as zero.

  In this sound inspection method for electrical products, a silence threshold for recognizing as silence is set, and when a sound signal equal to or greater than the silence threshold is detected, a comparison between the reference sound signal and the inspection sound signal is started over time. Thus, the reference audio signal and the inspection audio signal are synchronized as much as possible so that they can be compared over time. Therefore, it is highly possible that the electric product can accurately reproduce the incoming sound such as the incoming melody. Inspection can be performed with high accuracy and high reliability.

  Further, in this sound inspection method for electric appliances, a threshold value (silence threshold value) for recognizing as silence is set, and silence is included in an audio signal obtained by reproducing an audio signal such as a recorded ringtone using the electric appliance. When a voice signal that is equal to or higher than a threshold for recognition as a threshold (silence threshold) is detected, the reference voice signal and the test voice signal are compared over time, and the difference in volume value between the reference voice signal and the test voice signal is When the accumulated time exceeds a predetermined threshold, and the accumulated value is equal to or greater than a preset determination threshold, the electrical product is determined to be defective. When they are overlapped or displayed in parallel, it is not necessary to visually check whether the two audio signals are the same.

  In other words, if this sound inspection method for electrical products is used, a quality / reliability test can be performed by an unmanned machine whether or not ringtones and other audio signals recorded by the electrical products can be accurately reproduced. In addition, if you use the sound inspection method for electrical appliances, you can recognize the size and shape of the ringtones recorded by the electrical appliances, etc. without using a complicated and advanced speech recognition system that makes it possible to determine whether or not they are the same. The quality / reliability test of whether or not the audio signal can be accurately reproduced can be performed by an unmanned machine.

  According to a third aspect of the present invention, there is provided a sound inspection apparatus for an electrical product that defines the method for sound inspection of an electric product according to the first aspect as a device claim. The oscillator outputs the test whether the incoming ringtone and other voice information can be accurately reproduced, and the oscillator outputs the reference voice signal that uses the positive and negative amplitudes as it is centered on the silent state. Rather than making a comparison over time so that the test audio signal that uses the positive and negative amplitudes as they are centered around the silent state is synchronized, the volume value of the recorded and recorded audio signal Is converted to either the positive or negative direction with a silence level of zero as the reference voice signal, and this reference voice signal and then the ringtone and other sounds output from the speaker of the electrical product Set the signal volume to silence The bell converted to either positive or negative direction in the same direction as the reference audio signal, converted to either the positive direction or negative direction, the same direction as the reference audio signal, positive direction or The inspection audio signal converted in the negative direction is compared and judged over time so as to be synchronized or substantially.

  As a result, using this sound inspection device for an electric product, if it is inspected whether an incoming call tone such as an incoming melody can be accurately reproduced, the reference sound signal and the inspection sound signal can be used. Whether or not the ringtones and other audio information recorded by electrical appliances can be played back accurately even when the audio signal is played out of sync and played with a slight shift (substantially synchronized) The reference sound signal that uses the amplitude that swings to the positive side and the negative side as it is centered on the silent state that is output by the oscillator, and the positive side and the negative side that are output from the oscillator and that is centered on the silent state. Even though the two audio signals are actually the same or very similar, as in the case where the inspection audio signal using the swinging amplitude as it is is not synchronized and has a slight deviation, The two audio signals are significantly different That no one can be judged that.

In addition, in this sound inspection apparatus for electrical products, if a threshold value (silence threshold value) for recognizing as silence is set, a sound signal such as a recorded ringtone is reproduced using the electrical product. When a sound signal equal to or greater than a threshold (silence threshold) is detected, the reference sound signal and the inspection sound signal are compared over time, and the time during which the difference in volume value between the reference sound signal and the inspection sound signal is greater than or equal to a predetermined value If the electric product is determined to be defective when the accumulated value is equal to or greater than a predetermined threshold for determination, the conventional two audio signals can be overlapped or paralleled. When displayed, it is not necessary to visually check whether the two audio signals are the same.
That is, by using this electrical product sound inspection apparatus, it is possible to perform an unmanned machine for quality / reliability tests as to whether or not a ringtone and other audio signals recorded by the electrical product can be accurately reproduced.

  In addition, if you use the sound inspection device of this electrical product, you can recognize the size and shape of the ringtone recorded by the electrical product, etc. without using a complicated and advanced voice recognition system that makes it possible to determine whether or not they are the same. The quality / reliability test of whether or not the audio signal can be accurately reproduced can be performed by an unmanned machine.

  In the sound inspection apparatus for an electrical product according to claim 4, a threshold value for silence for recognizing as silence is set to a volume, and a volume value of a reference audio signal is set to a positive or negative direction with a silence level of zero. After either one is converted into positive or negative, the reference audio signal and the inspection audio signal are started to be compared over time when an audio signal equal to or greater than the silent threshold is detected in the inspection audio signal.

  When the volume level of the reference audio signal is converted from positive or negative to either the positive or negative direction with the silence level set to zero, the actual sound level is actually changed from the silence level defined as zero to the positive or negative direction. A sound level having a predetermined height is detected in either one of them.

  On the other hand, in order to check with high accuracy and high reliability whether an electronic product can accurately reproduce, for example, a ringtone such as an incoming melody, the reference audio signal and the inspection audio signal are synchronized as much as possible. In order to start the comparison over time, it is preferable to set a silence threshold for recognizing as silence corresponding to a silence level defined as zero.

  In this sound inspection apparatus for electrical products, a silence threshold for recognizing as silence is set, and when an audio signal equal to or greater than the silence threshold is detected, comparison of the reference audio signal and the inspection audio signal is started over time. Thus, the reference audio signal and the inspection audio signal are synchronized as much as possible so that they can be compared over time. Therefore, it is highly possible that the electric product can accurately reproduce the incoming sound such as the incoming melody. Inspection can be performed with high accuracy and high reliability.

  In addition, in this sound inspection apparatus for electrical products, a threshold (silence threshold) for recognizing as silence is set, and silence is included in a sound signal reproduced from a sound signal such as a recorded ringtone using the electrical product. When a voice signal that is equal to or higher than a threshold for recognition as a threshold (silence threshold) is detected, the reference voice signal and the test voice signal are compared over time, and the difference in volume value between the reference voice signal and the test voice signal is When the accumulated time exceeds a predetermined threshold, and the accumulated value is equal to or greater than a preset determination threshold, the electrical product is determined to be defective. When they are overlapped or displayed in parallel, it is not necessary to visually check whether the two audio signals are the same.

  That is, by using this electrical product sound inspection apparatus, it is possible to perform an unmanned machine for quality / reliability tests as to whether or not a ringtone and other audio signals recorded by the electrical product can be accurately reproduced. In addition, if you use the sound inspection method for electrical appliances, you can recognize the size and shape of the ringtones recorded by the electrical appliances, etc. without using a complicated and advanced speech recognition system that makes it possible to determine whether or not they are the same. The quality / reliability test of whether or not the audio signal can be accurately reproduced can be performed by an unmanned machine.

  In the sound inspection device for electrical products according to claim 5, the device can automatically call a ring tone or other sound information site to be recorded on the electrical product subject to the quality / reliability test. Quality and reliability tests can be performed unattended by machines from the sound information site calling stage.

  Hereinafter, an example of a sound inspection method for an electrical product according to the present invention, and an example of a sound inspection device for an electrical product suitable for carrying out an example of a sound inspection method for an electrical product, with reference to the drawings, explain in detail.

  FIG. 1 is a configuration diagram schematically illustrating an example of a configuration of a sound inspection apparatus for an electrical product according to the present invention.

Moreover, FIG. 2 is explanatory drawing which shows typically the concept of an example of the sound inspection method of the electric product which concerns on this invention.
The sound inspection apparatus 1 for an electrical product includes an arithmetic processing unit 2 and a sound collecting microphone 3.
The arithmetic processing means 2 includes a control device 4 including an arithmetic processing unit, a storage means, and the like, a display means 5, and an external input means 6 having a numeric keypad, function keys, character input keys, and other keys.

  In this sound inspection apparatus 1, an electrical product S to be tested in a quality / reliability test is installed at a predetermined location of the sound inspection apparatus 1.

  More specifically, when performing a quality / reliability test of the electrical product S using the electrical product sound inspection apparatus 1, a speaker of the electrical product S (more specifically, a ringtone or the like). A sound collecting microphone 3 is set at a position near a speaker SP provided for outputting audio information.

  In FIG. 1, the member device 7 is an external input means input operation for pressing and operating a key input unit (external input means for the electric product S) Sa of an electric product (a mobile phone that supports moving images in this example) S. Means are shown.

In this example, as the external input means input operation means 7, actuator means such as pneumatic, hydraulic or electromagnetic are provided so as to correspond to the number of key input sections (external input means of the electrical product S) Sa. Is used.
In addition, the member device indicated by 8 in FIG. 1 images the display screen of the electrical product when testing whether or not the display screen of the electrical product S to be subjected to the quality / reliability test operates normally. An imaging means is shown.

  In addition, the electrical product S to be subjected to the quality / reliability test is installed in the case body 9 indicated by a two-dot chain line in order to block external sounds, other disturbances, and the like.

  The sound inspection apparatus 1 for electrical products is installed in a place where the temperature and humidity are kept constant in order to maintain the quality and reliability of the inspection.

  The electrical product (mobile phone in this example) S to be tested in the quality / reliability test is a key input unit (external input means for the electrical product S) Sa of the electrical product (mobile phone in this example) S. The external input means input operation means 7 is set so that each actuator means can be pushed correctly.

  The external input means input operation means 7 stores information for calling the sound information site (access information, usually a telephone number or an Internet homepage address) in the storage unit of the arithmetic processing means 2, and the arithmetic processing means 2, when a call signal is input from the storage unit 2 or the external input means 6, information for calling the sound information site (access information, usually a telephone number or an Internet homepage address) is supplied to an electrical product (in this example, a mobile phone) ) The key input unit of S (external input means of the electrical product S) Sa performs a pressing operation so as to dial (input).

  In the sound inspection apparatus 1 for an electrical product, the key input unit (external input means for the electrical product S) Sa of the electrical product (in this example, a mobile phone) S is called by dialing (inputting), and thereby the speaker The ring tone and other sound information output from the SP are collected by the sound collecting microphone 3, and the ring tone and other sound information collected by the sound collecting microphone 3 are time-sound pressure (volume) as amplitude information. Information correlation data is stored in the storage unit of the arithmetic processing means 2 (more specifically, the control device 4).

The amplitude information stored in the storage unit of the arithmetic processing means 2 (more specifically, the control device 4) is converted into absolute value information by the arithmetic processing means 2 (more specifically, the control device 4). As the correlation data of the absolute value information of the time-sound pressure information, it is stored and displayed in the storage unit of the arithmetic processing means 2 (more specifically, the control device 4) (D1 in FIG. 2). (See data shown in.)
In the sound inspection apparatus 1 of this electrical product, correlation data (in FIG. 2, the absolute value information of time-sound pressure information) stored in the storage unit of the arithmetic processing means 2 (more specifically, the control apparatus 4). The threshold value for recognizing as silence can be set (see the threshold value Sth0 for recognizing as silence in FIG. 2).

  In the sound inspection apparatus 1 of the electrical product, the external input means input operation means 7 is used to perform the reproduction operation of the ringtone and other voice information recorded by the electrical product (mobile phone in this example) S, or from the outside. Dialing the electrical product (mobile phone in this example) S, which is the subject of the quality / reliability test, etc. Play.

  The ringtone and other audio information recorded and reproduced by the electrical product (mobile phone in this example) S is collected by the sound collection microphone 3 and collected, and the electrical product (mobile phone in this example). The ringtone and other audio information recorded and reproduced by S is sent to the arithmetic processing means 2 (more specifically, the control device 4).

The arithmetic processing means 2 (more specifically, the control device 4) receives a ringtone and other information recorded and reproduced by the electrical product (mobile phone in this example) S sent from the sound collecting microphone 3. The voice information is recognized as amplitude information and as correlation data of time-sound pressure information, and is converted into an absolute value.
Here, the conversion to the absolute value means that the negative direction with the silence level set to zero is reversely converted to the positive direction.

  Then, the arithmetic processing means 2 (more specifically, the control device 4), first, in the correlation data of the absolute value information of the time-sound pressure information, the amplitude information equal to or higher than the threshold Sth0 for recognizing as silence. At the time when the data of the absolute value information is confirmed (hereinafter, this position is referred to as a comparison start position S2), it is stored in advance in the storage unit of the arithmetic processing means 2 (more specifically, the control device 4). The reproduction of the correlation data (refer to the data indicated by D1 in FIG. 2) of the absolute value information of the time-sound pressure information is started (hereinafter, this position is referred to as a comparison start position S1), and the arithmetic processing means 2 ( More specifically, the control device 4) uses the amplitude information to indicate the ringtone and other audio information that is recorded and reproduced by the electrical product (mobile phone in this example) S sent from the sound collection microphone 3. As time-sound pressure information correlation data, Correlation data of absolute value information of time-sound pressure information converted to an absolute value (refer to data indicated by D2 in FIG. 2) (hereinafter referred to as “inspection audio signal”), and arithmetic processing means 2 in advance. (More specifically, the correlation data of the absolute value information of the time-sound pressure information stored in the storage unit of the control device 4 (refer to the data indicated by D1 in FIG. 2) (hereinafter referred to as “reference voice”). Are compared over time for a predetermined time from the comparison start positions S1 and S2, and the time during which the level difference between the reference audio signal and the inspection audio signal is greater than or equal to the predetermined time is accumulated. When the cumulative value of this time becomes equal to or greater than a predetermined determination threshold, the electrical product that is the subject of the quality test is determined to be defective.

  As is clear from the above description, in the sound inspection apparatus 1 for an electrical product, the inspection for matching / mismatching of the reference sound signal and the sound signal to be inspected is performed on the positive side and the negative side mainly in the silent state. Rather than making a comparative judgment over time so that the reference audio signal using the amplitude that swings as it is and the inspection audio signal that uses the amplitude that swings in the positive and negative sides, mainly in the silent state, are synchronized. The volume value of the recorded and recorded audio signal is obtained by converting the negative direction in which the silence level is zero into the positive and negative reversals, and then the reference audio signal (see data D1 shown in FIG. 2), and then the speaker of the electric product. The volume value of the audio signal output from the SP is obtained by reversely converting the negative direction with the silence level of zero to the positive direction as the inspection audio signal (see data D2 shown in FIG. 2), and the reference audio signal (see FIG. 2). (See data D1 shown in FIG. 2) At the time (comparison start position S2) that the amplitude information data (volume) equal to or greater than the threshold value Sth0 for recognizing as silence is confirmed in the inspection sound signal (see data D2 shown in FIG. 2), the inspection sound signal ( The data is reproduced so as to be synchronized with the data D2 shown in FIG. 2, and the reference audio signal (see data D1 shown in FIG. 2) and the inspection audio signal (see data D2 shown in FIG. 2). Are compared with each other over a predetermined time from the comparison start positions S1 and S2.

As a result, in the sound inspection apparatus 1 of this electrical product, two sound signals of the reference sound signal (see data D1 shown in FIG. 2) and the inspection sound signal (see data D2 shown in FIG. 2) are synchronized. Even if there is a slight deviation and comparison / judgment is made, the oscillator outputs a silent state that checks whether the ringtone and other audio information recorded by the electrical appliance can be accurately reproduced. The reference audio signal that uses the positive and negative amplitudes in the center is synchronized with the test audio signal that is output from the oscillator and that uses the positive and negative amplitudes in the silent state. In fact, the two audio signals are significantly different, even though the two audio signals are the same or very similar, as in the case of a slight deviation. There is no judgment. A problem-solving method of comparing both positive and negative amplitudes (using two reference signals) is also conceivable, but this method has a problem that takes a lot of time for determination.
In the above-described embodiment, the negative direction with the silence level set to zero is reversed in the positive direction with respect to the reference voice signal and the inspection voice signal. Conversely, the positive direction with the silence level set to zero is reversed in the negative direction. You may let them.
Further, in the sound inspection apparatus 1 for an electric product, a threshold value Sth0 for recognizing as silence is set, and a sound signal such as a recorded ringtone is reproduced using the electric product S to be subjected to a quality / reliability test. At the time of detecting an audio signal having a threshold value Sth0 or higher (comparison start position S2), the reference audio signal (see data D1 shown in FIG. 2) and the inspection audio signal (data D2 shown in FIG. 2) are detected. Are compared over time for a predetermined time from the comparison start positions S1 and S2, and the reference audio signal (see data D1 shown in FIG. 2) and the inspection audio signal (see data D2 shown in FIG. 2). )) When the difference between the volume values exceeds a predetermined value, and the accumulated value is equal to or greater than a preset judgment threshold, the electrical product subject to the quality / reliability test is defective. Because it is determined that the conventional The two audio signals, or overlapping, if you or displayed in parallel, whether two audio signals are the same, there is no need to perform visually.

  That is, by using this electrical product sound inspection apparatus 1, a quality / reliability test can be performed by an unmanned machine whether or not a ringtone or other audio signal recorded by the electrical product can be accurately reproduced.

  In addition, if the sound inspection apparatus 1 of the electric product is used, the incoming call recorded by the electric product S can be obtained without using a complicated and advanced voice recognition system that allows the size and shape to be recognized and whether or not they are the same. Quality and reliability tests for whether or not sound and other audio signals can be accurately reproduced can be performed by an unmanned machine.

  In addition, in this sound inspection device 1 of an electrical product, the device can automatically call a ringtone or other sound information site to be recorded on the electrical product S subject to the quality / reliability test. Quality and reliability tests can be performed unattended by machines from the sound information site call stage.

  If the sound inspection method for electrical products and the sound inspection device for electrical products according to the present invention are used, the quality / reliability test of whether or not ringtones and other audio signals recorded by the electrical products can be accurately reproduced is unmanned. Since it can be performed by a machine, it can be widely used for sound inspection methods for electrical products according to the present invention and quality / reliability tests for information terminals such as mobile phones of electrical products and other electrical products.

It is a block diagram which illustrates roughly an example of a structure of the sound inspection apparatus of the electric product which concerns on this invention. It is explanatory drawing which shows roughly the concept of the sound inspection method of the electric product which concerns on this invention. It is a figure which shows the audio | voice signal before the change extended in a positive / negative direction at a silence level.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric equipment sound inspection apparatus 2 Arithmetic processing means 3 Sound collection microphone 4 Control apparatus 5 Display means 6 External input means 7 External input means input operation means 8 Imaging means 9 Case body S Electric appliance Sa Key input part Sp Speaker

Claims (5)

A method for sound inspection of an electrical appliance, in which a match between a reference sound signal and a sound signal to be inspected is checked over time to determine whether a sound signal to be inspected matches or does not match,
A volume value of the reference audio signal, a positive direction in which the silence level is zero, and a negative direction obtained by converting either the positive direction or the negative direction is set as a reference audio signal,
A volume value of the audio signal to be inspected is a sound level obtained by converting a positive value or a negative direction in the same direction as the reference audio signal, with the silence level set to zero, and the positive / negative reverse conversion. Accumulating the time when the difference in volume value between the audio signal and the inspection audio signal is a predetermined value or more,
A sound inspection method for electrical appliances, in which a discrepancy is determined when the cumulative value is equal to or greater than a predetermined threshold for determination. Set the soundless threshold value for recognizing as soundless, set the sound volume value of the reference sound signal to either the positive direction or the negative direction with the soundless level set to zero, and the positive / negative reverse conversion, then the inspection sound 2. The sound inspection of an electrical product according to claim 1, wherein a comparison between the reference sound signal and the inspection sound signal is started over time when a sound signal equal to or greater than the silence threshold is detected in the signal. Method. A sound inspection device for an electrical product that checks the coincidence between a reference audio signal and an audio signal to be inspected over time, and determines whether the audio signal to be inspected matches or does not match,
A sound collecting microphone for collecting a sound signal output from a speaker provided in the electric product;
A storage unit for storing an audio signal collected by the sound collection microphone, and a volume value of the audio signal stored in the storage unit for positive / negative reverse conversion in either a positive direction or a negative direction with a silence level of zero Positive / negative / reverse conversion means for
The positive / negative / reverse conversion means uses the electrical product to reproduce the audio signal such as the recorded ringtone, and the positive / negative reverse of either the positive or negative direction with a silence level of zero. The converted signal is used as a reference audio signal.
Next, using the appliance, the volume value of the audio signal obtained by reproducing the audio signal such as the recorded ringtone is zero, the silence level is zero, and either the positive direction or the negative direction in the same direction as the reference audio signal An inspection audio signal is obtained by converting one to the other.
The time when the difference between the sound volume values of the reference audio signal and the inspection audio signal is greater than or equal to a predetermined value is accumulated, and when the accumulated value is equal to or greater than a predetermined determination threshold, it is determined that there is a mismatch. , Sound inspection method for electrical products. A silent threshold means for setting the silent threshold for recognizing as silent to the volume;
Silence threshold means for detecting the silence threshold set by the silence threshold means after the positive / negative reverse conversion of either the positive direction or the negative direction with the silence level set to zero as the volume value of the reference audio signal With
When the silence threshold means detects an audio signal that is equal to or higher than the silence threshold set by the silence threshold means in the inspection audio signal, the reference audio signal and the inspection audio signal are compared over time. The sound inspection apparatus for an electrical product according to claim 3, which is started. Storage means for storing information for calling a sound information site to be recorded, and external input means input operation means for inputting information for calling the sound information site stored in the storage means to the external input means of the electrical product. The sound inspection device for an electric product according to claim 3 or 4.