JP2008301093A - Portable electronic equipment and method for outputting sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide portable electronic equipment and a sound output method capable of outputting a specific sound at a sufficiently large sound pressure level even when a box-body shape is miniaturized and thinned. <P>SOLUTION: An acoustic processing section 74 outputs the specific sound in a state raising a sound pressure level in a frequency band corresponding to the maximum sound pressure level in specified sound output characteristics when the specific sound having a specific frequency band is output from a loudspeaker 77 through a sound hole. The specific sound is composed of at least one of a buzzer sound, an alarm sound and a receiving sound. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable electronic device that outputs sound and a sound output method, and more particularly, to a portable electronic device and a sound output method that include a speaker that emits sound and the like.

  2. Description of the Related Art Conventionally, portable electronic devices such as mobile phones, various mobile devices, and electronic dictionaries have been known that can sound alarm buzzers, alarms, ringtones, and the like (see, for example, Patent Document 1).

  In such portable electronic devices, the miniaturization and thinning are rapidly progressing, and the speakers arranged inside the portable electronic device main body (housing) are forced to be small and thin. .

  Therefore, when sounding an alarm buzzer or the like from such a speaker, if sound output is performed using the sound output characteristic unique to the speaker as it is, the sound pressure is too high and sound cracking occurs or the sound pressure is reduced. Problems such as low and difficult to hear are likely to occur, especially because it is becoming difficult to secure the speaker placement volume in the housing, so there is a tendency that an alarm buzzer or the like of the desired sound pressure level is not output .

Therefore, when placing a speaker in a housing that is becoming smaller and thinner, the number and shape of the sound output holes formed in the housing, the arrangement position, etc. should be taken into account as much as possible for the sound output characteristics unique to the speaker. A technique for increasing the sound pressure while utilizing the above is known (see, for example, Patent Document 2).
JP 2000-184021 A JP 2002-169565 A

  However, in such a portable electronic device, since the portable electronic device main body (housing) performs the same function as the speaker housing in the acoustic device, its housing structure (including the arrangement of internal components, etc.) In consideration of the above, it is necessary to determine the sound output characteristics in consideration of the frequency band and sound pressure level used at the time of sound output.

  However, in the above-described portable electronic device, the speaker is simply arranged around the front surface inside the housing. For example, in a foldable mobile phone, a use state (expanded state) and a non-use state (folded state) However, there is a problem that the relationship between the front of the housing and the speaker arrangement changes.

  In the above-described alarm buzzer and the like, since the tone color is a sound composed of a single frequency, the use frequency band and the sound pressure level are the same regardless of the model of the portable electronic device. Since the sound source data is used, it is difficult to hear depending on the type of the portable electronic device, and the problem that it is difficult to obtain the specified sound pressure level cannot be solved.

  Therefore, the present invention has been made in view of the above-described problems, and one of its purposes is to generate a specific sound with a sound pressure level that is sufficiently large even when the housing shape is reduced in size and thickness. It is an object to provide a portable electronic device and a sound output method that enable output.

  In order to solve the above problems, a portable electronic device according to the present invention includes a housing in which an acoustic hole is formed, and a speaker that is disposed at a predetermined location in the housing and outputs sound through the acoustic hole. A sound output control unit that controls a sound pressure level of the sound output from the speaker, and the sound output from the speaker through the sound hole has a predetermined sound output characteristic, and the sound The output control unit, when outputting a specific sound from the speaker through the acoustic hole, in a state of increasing the sound pressure level of a predetermined frequency band that is the maximum sound pressure level in the predetermined sound output characteristics, The specific sound is output.

  Further, the portable electronic device includes a storage unit that stores in advance a specific sound in a state where the sound pressure level of the predetermined frequency band that is the maximum sound pressure level with the predetermined sound output characteristic is increased, The sound output control unit preferably reads and outputs the specific sound stored in the storage unit when outputting the specific sound from the speaker through the acoustic hole.

  The portable electronic device further includes a storage unit that stores in advance the specific sound that has the maximum sound pressure level in a specific frequency band different from the predetermined frequency band, and the sound output control unit When outputting the specific sound from the speaker through the hole, it is preferable to increase the sound pressure level of the specific sound stored in the storage unit in the predetermined frequency band and output the specific sound.

  In the portable electronic device, the sound output control unit may increase the sound pressure level in the specific frequency band when outputting the specific sound from the speaker through the sound hole. preferable.

  In the portable electronic device, the specific sound is preferably a sound composed of a single frequency.

  In the portable electronic device, it is preferable that the specific sound is constituted by at least one of a buzzer sound, an alarm sound, and a ringtone.

  In addition, in order to solve the above-described problem, the sound output method according to the present invention is arranged in a housing in which an acoustic hole is formed and a predetermined location in the housing, and outputs sound through the acoustic hole. In a sound output method in a portable electronic device including a speaker and a sound output control unit that controls a sound pressure level of sound output from the speaker, sound output from the speaker through the acoustic hole is A predetermined sound output characteristic, and when a specific sound is output from the speaker through the sound hole, a sound pressure level in a predetermined frequency band that provides a maximum sound pressure level with the predetermined sound output characteristic The specific sound is output in a raised state.

  The portable electronic device of the present invention enables sound output at a sufficient sound pressure level even when the housing shape is reduced in size and thickness.

  Embodiments of the present invention will be described below.

  FIG. 1 is an external perspective view of a mobile phone 1 which is an example of a mobile electronic device according to the present invention. FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. The portable electronic device is not limited to a mobile phone, and may be a so-called mobile device or a portable crime prevention buzzer.

  In FIG. 1, the mobile phone 1 includes an operation unit side body unit 2 and a display unit side body unit 3.

  The operation unit side body unit 2 includes an operation button group 11 and a voice input unit 12 to which a voice uttered by a user of the mobile phone 1 is input on the surface unit 10.

  The operation button group 11 includes a function setting operation button 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input operation button 14 for inputting a telephone number and characters such as mail. And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body unit 3 includes a display unit 21 for displaying various types of information on the surface unit 20 and an audio output unit 22 for outputting the voice of the other party on the call.

  Further, the operation button group 11, the voice input unit 12, the display 21, and the voice output unit 22 described above constitute a part of the processing unit 62 described later.

  Further, the upper end of the operation unit side body 2 and the lower end of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the cellular phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 connected via the hinge mechanism 4, thereby displaying the operation unit side body 2 and the display. Changed between a use state (expanded state) in which the unit-side housing unit 3 is open to each other and a non-use state (folded state) in which the operation unit-side housing unit 2 and the display unit-side housing unit 3 are folded. can do.

  FIG. 2 is a functional block diagram showing functions of the mobile phone 1.

  The mobile phone 1 includes a communication unit 61 that communicates with an external terminal, and a processing unit 62 that processes information communicated by the communication unit 61.

  The communication unit 61 includes a main antenna 70 that communicates with an external device (base station) in a predetermined use frequency band, and a communication processing unit 71 that performs signal processing such as modulation processing or demodulation processing. The communication unit 61 is supplied with power from the rechargeable battery 43.

  The main antenna 70 communicates with an external device in a predetermined use frequency band (for example, 800 MHz). In the present embodiment, the predetermined use frequency band is 800 MHz, but other frequency bands may be used. Further, the main antenna 70 may have a so-called dual band compatible type that can support a second use frequency band (for example, 2 GHz) in addition to a predetermined use frequency band. You may be comprised by the type corresponding to multiple bands which can respond also to a frequency band.

  The communication processing unit 71 demodulates the signal received by the main antenna 70, supplies the processed signal to the processing unit 62, modulates the signal supplied from the processing unit 62, and performs external processing via the main antenna 70. Send to device.

  The processing unit 62 includes an operation button group 11, a voice input unit 12, a display 21, a voice output unit 22, a CPU 72 that performs predetermined calculation processing, a memory 73 that stores predetermined data, An acoustic processing unit (acoustic output control unit) 74 that performs predetermined sound processing, an image processing unit 75 that performs predetermined image processing, a camera module 76 that captures an object, a speaker 77 that outputs ringtones, and the like, It has. Further, the processing unit 62 is supplied with power from the rechargeable battery 43. Each of these constituent members is disposed inside either the operation unit side body 2 or the display unit side body 3.

  The memory 73 stores a control program related to sound pressure control according to the present invention, and the CPU 72 that executes the control program constitutes a microcomputer.

  Specifically, the speaker 77 is provided, for example, inside the housing on the back surface (the surface opposite to the placement surface of the operation button group 11) of the operation unit side housing unit 2, and on the operation unit side. Depending on the housing shape of the housing portion 2 and the function of the speaker itself, the sound output is performed with a predetermined acoustic output characteristic in a state of being disposed in the operation portion side housing portion 2. Further, the sound output from the speaker 77 is output to the outside of the casing through an acoustic hole formed on the back surface of the operation section side casing 2. The place where the speaker 77 is disposed is not limited to the operation unit side body 2, and may be provided in the display unit side body 3.

  FIG. 3 is a graph of the sound output characteristics showing the relationship between the frequency characteristics and the sound pressure in the predetermined sound output characteristics of the speaker 77 associated with such a housing shape (housing structure). As shown in FIG. 3, the speaker 77 of the mobile phone 1 of the present invention has a sound pressure level with a sound pressure level of about 98 dB at a frequency band of about 8000 Hz (predetermined frequency band). It has become the maximum. Note that the sound output characteristics are determined by the housing shape and the speaker 77 arranged, and the sound output characteristics shown in FIG. 3 are an example.

  On the other hand, the memory 73 stores various sound source data such as an alarm buzzer sound, an alarm sound, a ringtone, etc. (hereinafter referred to as a specific sound), and outputs sound (sounds) from the speaker 77 as necessary. It has become.

  At this time, for example, a general alarm buzzer sound is a monotonous tone whose tone color is composed of a single frequency, so the frequency band used and the sound pressure level are independent of the model of the portable electronic device, etc. The same sound source data is used.

  FIG. 4 is a graph showing the relationship between the frequency band and the sound pressure in such a general alarm buzzer sound.

  As shown in FIG. 4, in a general alarm buzzer sound, sound pressure concentrates in a frequency band (specific frequency band) around 1000 to 2000 Hz, and a predetermined sound output characteristic of the speaker 77 is obtained. The sound source data has the maximum sound pressure level in the specific frequency band different from the predetermined frequency band, and the sound pressure peak value is in the vicinity of about 97 dB.

  However, when an alarm buzzer is sounded using the speaker 77 provided in the cellular phone 1, the sound output characteristic of the speaker 77 shown in FIG. 3 is around 1000 to 2000 Hz (frequency band corresponding to a specific frequency band). Then, since only the sound pressure level of 80 dB to 90 dB can be output, the sound pressure level of the output alarm buzzer sound is 80 dB to 90 dB, which is lower than the original maximum sound pressure level (97 dB).

  Therefore, in the mobile phone 1 according to the present invention, when the sound output characteristic of the speaker 77 shown in FIG. 3 is provided, the alarm buzzer sound having the sound pressure level characteristic shown in FIG. The purpose is to enable a sufficient sound pressure level without being accompanied.

  Specifically, the sound output control unit (configured by the sound processing unit 74 and the CPU 72) is a specific sound (for example, a diagram) having a maximum sound pressure level in a specific frequency band from the speaker 77 through the sound hole. 4), the sound source data of the specific sound is read from the memory 73, and a predetermined sound output characteristic (for example, the sound output characteristic of the mobile phone 1 shown in FIG. 3) is output. An alarm buzzer sound (specific sound) is output in a state where the sound pressure level in the frequency band corresponding to the predetermined frequency band (in the vicinity of 8000 Hz in FIG. 3) corresponding to the maximum sound pressure level is increased (see FIG. 5). .)

  FIG. 5 shows an alarm buzzer sound (specific sound) in a state where the sound pressure level in the frequency band corresponding to the predetermined frequency band (near 8000 Hz) that is the maximum sound pressure level in the sound output characteristics of the mobile phone 1 is increased. The frequency characteristics are shown.

  Therefore, the mobile phone 1 according to the present invention raises the sound pressure level in the frequency band corresponding to the predetermined frequency band where the sound output characteristic of the mobile phone 1 has the maximum sound pressure level, thereby generating an alarm buzzer sound (specific sound). ) Is output, it is possible to output an alarm buzzer sound (specific sound) with a sufficiently high sound pressure level according to the sound output characteristics of the mobile phone 1. Further, in the mobile phone 1 according to the present invention, the original characteristic frequency characteristic of the alarm buzzer sound (characteristic that the sound pressure level becomes maximum in the frequency band of 1000 Hz to 2000 Hz) is maintained, and the high frequency band (predetermined). The sound pressure level in the frequency band) is increased and output, so that a large alarm buzzer sound can be produced in terms of audibility without impairing the characteristics of the alarm buzzer sound.

  Further, instead of the configuration in which the sound pressure level in the predetermined frequency band of the alarm buzzer sound (specific sound) having the frequency characteristics shown in FIG. An alarm buzzer sound (specific sound) having such frequency characteristics may be stored in the memory 73 in advance. In the case of such a configuration, the mobile phone 1 reads and outputs the alarm buzzer sound stored in the memory 73 when outputting the alarm buzzer sound from the speaker 77 through the acoustic hole.

  In addition, when the mobile phone 1 outputs an alarm buzzer sound from the speaker 77 through the acoustic hole, the sound pressure in a specific frequency band (1000 Hz to 2000 Hz) of the alarm buzzer sound that maximizes the original sound pressure level. It is preferable to increase the level for output. In this case, the alarm buzzer sound to be output is increased in sound pressure level in a predetermined frequency band (near 8000 Hz) and a specific frequency band (1000 Hz to 2000 Hz), and can be sounded with a larger alarm buzzer sound. it can. Further, only the sound pressure level in a specific frequency band (1000 Hz to 2000 Hz) may be increased. In this case, the sound pressure level in the original specific frequency band (1000 Hz to 2000 Hz) may be increased. The alarm buzzer sounds at a high sound pressure level, and the alarm buzzer sounds at a sound pressure level equivalent to the sound pressure level of the alarm buzzer sound that is output by raising the sound pressure level in the predetermined frequency band (around 8000 Hz) Sound can be sounded.

  In this embodiment, the specific sound is described as the alarm buzzer sound. However, the specific sound is not limited to this, and an alarm sound, a ringtone, or the like may be used.

It is a perspective view which shows the external appearance of the mobile telephone which concerns on this invention. It is a block diagram which shows the function of the mobile telephone which concerns on this invention. It is a graph of the sound output characteristic in the mobile phone according to the present invention. It is a graph of the output characteristic of the sound source before the sound pressure level change in the mobile phone according to the present invention. It is a graph of the output characteristic of the sound source after changing the sound pressure level in the mobile phone according to the present invention.

Explanation of symbols

1 mobile phone 2 operation unit side case (case)
3 Display unit side housing (housing)
72 Memory (storage unit)
73 CPU
74 Sound processor 77 Speaker

Claims (7)

A housing in which an acoustic hole is formed;
A speaker arranged at a predetermined location in the housing and outputting sound through the acoustic hole;
A sound output control unit for controlling the sound pressure level of the sound output from the speaker,
The sound output from the speaker through the acoustic hole has a predetermined acoustic output characteristic,
When the sound output control unit outputs a specific sound from the speaker through the sound hole, the sound pressure level is increased in a predetermined frequency band that is a maximum sound pressure level with the predetermined sound output characteristic. The portable electronic device outputs the specific sound. A storage unit in which a specific sound in a state where the sound pressure level of the predetermined frequency band that is the maximum sound pressure level with the predetermined sound output characteristic is increased is stored in advance;
The said sound output control part reads and outputs the said specific sound memorize | stored in the said memory | storage part, when outputting a specific sound from the said speaker through the said acoustic hole. Portable electronic device. A storage unit in which the specific sound having the maximum sound pressure level in a specific frequency band different from the predetermined frequency band is stored in advance;
The sound output control unit raises and outputs a sound pressure level in the predetermined frequency band of the specific sound stored in the storage unit when the specific sound is output from the speaker through the sound hole. The portable electronic device according to claim 1.   The said sound output control part raises the sound pressure level of the said specific frequency band, and outputs it, when outputting the said specific sound from the said speaker through the said sound hole. Portable electronic devices.   The portable electronic device according to claim 1, wherein the specific sound is a sound composed of a single frequency.   The portable electronic device according to any one of claims 1 to 5, wherein the specific sound includes at least one of a buzzer sound, an alarm sound, and a ringtone. A housing in which an acoustic hole is formed, a speaker that is disposed at a predetermined location in the housing and outputs sound through the acoustic hole, and an acoustic output that controls the sound pressure level of the sound output from the speaker A sound output method in a portable electronic device comprising a control unit,
The sound output from the speaker through the acoustic hole has a predetermined acoustic output characteristic,
When the specific sound is output from the speaker through the acoustic hole, the specific sound is output in a state where the sound pressure level of the predetermined frequency band that is the maximum sound pressure level with the predetermined sound output characteristic is increased. A sound output method characterized by:

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