JP2000083291A - Portable device provided with loudspeaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide entirely novel amusement where only a specific person can hear a sound stored in advance by providing a speaker with super-directivity to the portable device and reproducing the sound stored in advance with the speaker having super-directivity. SOLUTION: The portable device has a case and an internal power supply, a sound storage medium and a speaker 20 with super-directivity contained in the inside of the case. The portable device is provided with the speaker 20 with super-directivity that emits a sound wave stored in the sound storage medium by the power supply externally toward a target direction only.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable game machine, a voice recorder, etc., which includes a speaker and an internal power supply, plays a game by playing a game sound outdoors, and reproduces a recorded real voice. The present invention relates to a portable device provided with a loudspeaker.

[0002]

2. Description of the Related Art For example, a portable game machine is known as a portable device having a speaker of this type. In this portable game machine, a device in which information necessary for playing an individual game such as a game program is stored in advance inside the portable game device, and a game cartridge is separately prepared. There are known ones that allow various games to be played by replacing them.

[0003] As a portable device provided with another speaker, a voice recorder is known. This voice recorder is configured to record a human voice at any place using an internal power supply both outdoors and indoors, and reproduce a sound such as the recorded real voice.

[0004]

However, a portable device having a speaker such as a portable game machine or a voice recorder described above reproduces the sound effect of the game or the sound recorded by the user through a built-in speaker. For example, it is necessary to increase the sound to be reproduced in order to make the sound be heard by a person slightly outside in the room, and there is a risk that surrounding sounds may be inconvenienced when the sound is increased in this manner.

[0005] In particular, in order to make a person at a slightly distant position hear a sound while riding on a vehicle such as a train even outdoors, care must be taken to reduce the sound so that people around him cannot hear the sound. If it is too long, it will not be possible for the person trying to hear it to be heard. Was troublesome.

In addition, for example, the result of playing a personality judgment game or the like, or a sound effect prepared in advance (for example, “I like!”
"Tall!""Van!") Is selected by the user of the portable game machine as a game player, and in order to listen to the selected sound effect, the same as described above, There is a similar problem that it is necessary to hand the portable game machine.

[0007] When trying to hear the above-mentioned sound effect to another person, it is necessary to hand over the portable game machine as described above. There is a problem that can not be effectively communicated to the person who wants to communicate.

[0008] The inventor of the present application thought that it would be more interesting to make it difficult for other people to hear such a sound effect without knowing from whom it was heard.

Another object of the present invention is to provide a super-directional speaker in a portable device, reproduce a previously stored sound with the super-directional speaker, and make only a specific person hear the sound. The challenge is to provide completely new fun that can be done.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a case, an internal power supply, a sound storage medium, and a super-directional speaker provided inside the case. A portable device provided with a loudspeaker, wherein the super-directional loudspeaker is capable of emitting a sound wave capable of propagating in a direction aimed at a sound stored in the sound storage medium by the power supply to the outside. It is characterized by the following.

The super-directional speaker is a speaker exhibiting strong directivity in one direction, and for example, a conventionally known parametric speaker as described below can be employed.

That is, a description of the above-described parametric speaker that generates a superdirective sound wave in the audible range, which is conventionally known, can be found in, for example, the editor / Acoustic Society of Japan, and the publisher / Kodansha Co., Ltd. 1st edition) Title “Anything in the Sound: A Small Dictionary / From the Mechanism of the Brain Listening to the Sound to the Ultrasonic Microscope”, page 224, lines 17 to 2
The explanation is as follows on page 26, line 8.

[0013] Also, there is a method of arranging a large number of speakers and simulating them as a large speaker. However, even with these methods, it is difficult to achieve a high degree of focusing of the sound. There is a special technology called "parametric speaker". A powerful ultrasonic wave having a higher frequency than an audible sound is radiated with a sound wave in the audible range. As shown in FIG. 5-5, the principle is the same as that of radio AM broadcasting in which the magnitude (amplitude) of an ultrasonic signal is changed according to sound waves in an audible range to be transmitted. A radio is required to reproduce sound from the radio waves of AM broadcasting, but a special device is not required for reproduction in the case of ultrasonic waves. This is because air, which is a sound propagation medium, performs a demodulation function of a radio wave against a powerful sound wave. Although the details of the mechanism are omitted, in the case of a powerful ultrasonic wave, the waveform is distorted while traveling in the air, and an audible range component of the original signal is automatically generated. According to this method, the wave sources are widely scattered along the path in which the ultrasonic waves travel, and the wave source looks like a large wave source. As a result, similarly to using a large speaker,
Sound waves can be emitted sharply in one direction. With this technology,
For example, it is possible to allow only a specific person to listen to a necessary sound in a crowd. It is described.

Further, as an apparatus utilizing the above-described parametric speaker, Japanese Patent Laid-Open Publication No. Hei 2-253800 proposes an audio apparatus utilizing spatial multiplexing. The invention of this publication is intended to acoustically partition one space into a plurality of areas. For details, an example of an exhibition hall is given in an embodiment, and it is desired to hear explanations of a plurality of exhibitions. If you stand in front of an exhibition corner, you will be able to hear a clear explanation without being disturbed by the audio of the explanation of the other exhibition corners.

The above-mentioned parametric loudspeaker generates an audible sound wave having a strong directivity in one direction, similar to an ultrasonic wave propagating in the air. As a method of generating sound, a directional sound wave can be generated by using a speaker having a vibration surface diameter of about several tens of times the wavelength of the sound to be generated, and a horn speaker must be used. Can generate a similar directional audible sound wave, but a parametric speaker can generate a sound wave having the strongest directivity in one direction.

The case includes a case in which two cases are separated from each other as in a second embodiment to be described later. In short, the case is a case formed of a hard material or the like so as to be portable and portable. Any storage medium may be used as long as it can be stored while protecting it from external shocks and the like.

According to the second aspect of the present invention, a microphone is provided in the case so that sound can be recorded on the storage medium by the microphone, and the sound recorded by the microphone can be recorded by the super-directional speaker. It is characterized in that it is configured to reproduce.

The microphone can also be used as the super-directional speaker. In other words, a super-directional speaker can be used as a microphone during recording, and can be used as it is during reproduction.

Further, a sight is provided on the surface of the case so that the user can aim the direction in which the sound is propagated so as to emit the sound wave.

The sight comprises a sight at the tip of the muzzle firing, such as a sight of a gun, and a sight at the rear end opposite to the muzzle. It is also possible to adopt a device that aims so that the vessel and the part to be aimed are located on a straight line.

Further, the present invention is not limited to such a sight. For example, a red laser oscillator may be provided at a sound wave emission port, and a laser beam emitted by the red laser oscillator may be applied to a target direction or a target object. It is also possible to apply a sight that emits a sound wave by visually judging whether or not the user is hitting the laser beam visually.

According to a fourth aspect of the present invention, the super directional speaker is a parametric speaker. When this parametric speaker is employed, the ultrasonic wave f1 or f2 is preferably set to 20 MHz or more, which cannot be heard by human hearing. However, depending on the person who has a good ear, there is a possibility that even a sound of 40 MHz may hear a sound with some uncomfortable feeling. In such a case, it is preferable to set the frequency to 80 to 100 MHz or more. . However, if the frequency is set too high, the distance that the sound wave can reach becomes short.
It must be kept at around 00 MHz.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. However, the present invention is not limited to a plurality of embodiments described below. (Embodiment 1) Embodiment 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view in which the present invention is applied to a voice recorder as a portable device. FIG. 2 is a control block diagram of the portable device shown in FIG. 1, and FIG. 3 is an explanatory diagram for explaining the principle of the parametric speaker.

In FIG. 1, reference numeral 50 denotes a voice recorder as a portable device.
A case body 51 as a case of the present invention, a surface portion of the case body 51, an operation means 55 for a user to operate the portable device, and a sound wave having strong directivity in one direction. Directional speaker 20 that indirectly emits light
And a speaker 57 for generating sound waves that propagate evenly in all directions, and a microphone 60 for converting a real voice or the like into an electric signal.

As the operating means 55, various switches can be applied to the present invention. In the present invention, a button switch is employed. The operating means 55 is composed of three button switches, 55A is a recording switch, 55B is a reproduction switch by the super-directional speaker 20, and 55C is a reproduction switch by the speaker 57. The operating means 55 employs a switch that automatically returns using a spring or the like, and is turned on only when the user presses the button, and is turned off when the user releases his hand. The power consumption of the internal power supply is reduced as much as possible. Next, a hardware configuration of the portable device will be described with reference to FIG. A voice recording / reproducing device 40 as a semiconductor IC is built in the case body 51. The voice recording / reproducing device 40 is electrically connected to the above-described super-directional speaker 20, microphone 60, and speaker 57. It is connected.

In the figure, reference numeral 45 denotes an internal power supply, which is used as a power supply for generating sound waves from the speakers 20 and 57 and is housed in the case body 51. The internal power supply 45 is connected to the case body 51. The built-in device serves as a portable device that can be carried.

A delta modulator 41 having an A / D conversion function is provided in an IC chip as the voice recording / reproducing device 40.
, A level detector 42, a control circuit 43, a random access memory (RAM) 44 as a sound storage medium, and a changeover switch circuit 56.

An amplifier circuit 60A is interposed between the microphone 60 and the voice recording / reproducing device 40. When the user presses the recording button 55A of the operation means 55 and emits a voice to be recorded toward the microphone 60, the microphone 60 converts the voice of the user into an analog electric signal, and converts the analog electric signal. The signal is amplified by the amplifier 60A. When the amplified electric signal is judged to be higher than a predetermined level by the level detector 42, the amplified electric signal is digitally converted by the delta modulator 41. The level detector 42 is provided to prevent the microphone 60 from picking up noise and recording such noise.

The digitized electric signal is temporarily stored as sound data in the random access memory 44 under the control of the control circuit 43. The above is the recording operation.

The speakers 20 and 57 are connected to the delta modulator 41 via a switch circuit 56 built in the voice recording / reproducing device 40. Button switch 5
When the switch 5B is turned on, the delta modulator 41 is electrically connected to the super-directional speaker 20, while when the button switch 55C is turned on, the delta modulator 41 is electrically connected to the speaker 57. The sound data stored in the random access memory 44 as described above is reproduced by the speaker 20 or 57 connected to the delta modulator 41 and the speaker 20 or 57.

Next, a description will be given of how a parametric speaker as the super-directional speaker 20 generates a sound wave having high directivity in one direction with reference to FIG.

This parametric speaker uses an ultrasonic wave having a high directivity in order to send the sound to a specific area with directivity. The sound data primarily stored in the random access memory 44 is electrically transmitted to the super-directional speaker 20, from which two ultrasonic waves f1 and f2 having different frequencies are transmitted to the delta modulator 41.
The sound data (audio data) transmitted via the PC is put on the air, and the two ultrasonic waves f1 and f2 are caused to interfere with each other in the air to generate a new sound having the sum and difference frequencies of the two frequencies. Then, the sound data temporarily stored in the random access memory 44 at the difference (f1-f2) frequency is reproduced with sound waves in the audible range.

As described above, when an ultrasonic wave that cannot be heard by a human is used and the frequency of f1-f2 generated by the interference of the two ultrasonic waves is changed to a sound in the audible range, the audible sound generated in the air is generated. The sound waves in the region can be emitted in the direction in which the directivity is very strong, and the sound reproduced by the speaker 20 can be heard only by the person who aimed.

The phenomenon of generating an audible sound wave in the air in this manner is called a non-linear parametric action or a non-linear interaction of sound waves. Utilizing sex media. The parametric loudspeaker refers to a loudspeaker utilizing the above-described non-linear parametric action. However, the loudspeaker usable in the present invention is not limited to a parametric loudspeaker, and any loudspeaker that can generate a highly directional sound wave can be applied.

Reference numeral 47 in FIG. 1 denotes a sight, which is formed of a semiconductor laser. When the button switch 55B is pressed by the power of the internal power supply 45, the sight loudspeaker 20 is used. The positional relationship between the sound emitting direction of the super-directional speaker 20 and the laser emitting direction is set in advance so that the laser is emitted in the sound emitting direction.

The user sets the button switch 55B to O
If N, the aim can be determined by visually recognizing whether or not the laser light is hitting the target object with respect to the sound wave direction indirectly emitted from superdirective speaker 20. In this way, the user who wants to emit a sound wave can visually recognize whether or not the sound wave is emitted in the aimed direction, so that the sound wave can be applied to the aimed person or an animal having hearing such as an animal. It is possible to indirectly recognize whether or not has arrived.

The microphone 60 is not always required to be included in the voice recorder 50. For example, a predetermined sound (music, human voice, animal singing, etc.) is stored in the random access memory 44. ,
The voice recorder 50 having only the function of reproducing the stored sound may be used. Further, in this case, the above-mentioned predetermined sound (music, human voice, animal cry, etc.) may be stored in the mask ROM instead of the random access memory 44 in the manufacturing stage.

Further, predetermined sounds (music, human real voice, animal cry, etc.) are stored in a random access memory 4.
4, a voice recorder having a plurality of types of case shapes in the shape of a doll inside a game housing, such as a coin-operated “voice holder” manufactured by the present applicant. Are stored, and a favorite doll is selected by a user's operation. The doll includes the super-directional speaker 20 and the internal power supply 4.
5 and the random access memory 44 for storing sounds, and the user's voice is stored in the memory 44 by a microphone 60 simulating a telephone receiver provided in the game housing. It is also possible. In this case, the voice recorder imitating a doll does not have a recording function. (Embodiment 2) A second embodiment as another embodiment according to the present invention will be described below with reference to FIGS. In the second embodiment, configurations having the same functions as those in the first embodiment are denoted by the same reference numerals as much as possible, and description thereof is omitted.

In the second embodiment, the present invention is applied to a portable game machine in place of the above-described present invention applied to a voice recorder.

As shown in FIG. 4, reference numeral 65 denotes a portable device as a portable game machine. The portable game machine 65 has a connector 65A.
Module 66 with built-in super-directional speaker for A
Is detachably provided. The portable game machine 65
Is provided with a liquid crystal display 67A on the surface of the main body case 67.
, A game operation means 67B, and a power switch 67C.

A line-shaped long hole 60B formed in the surface of the main body case 67 is provided for introducing sound into the microphone 60 from outside the main body case 67. Has a plurality of holes 60 for guiding sound waves emitted from the speaker 57 to the outside.
C is provided.

The module 66 has a super directional speaker 20 disposed on the surface of a module case 68 so as to emit sound waves to the outside.

The main body case 67 and the module case 6
8 corresponds to the case in the present invention. In the main body case 67 and the module case 68, an internal power supply 45, a microphone 60,
In addition, a super-directional speaker 20, a speaker 57, and a semiconductor memory as a storage medium are incorporated.

According to the portable game machine 65 as described above, the main body case 67 and the module case 68 are connected as described above, and the user operates the game operation means 67B to thereby obtain the microphone. 60, a sound is recorded, and the recorded sound is transmitted to the operating means 6 of the game.
7B allows the superdirective speaker 20 provided in the module 68 to emit in a target direction.

According to the voice recorder 50, whether to emit a sound wave from the super-directional speaker 20 or to emit a sound from the speaker 57 can be operated by the button switch 55. In the game machine 65, by connecting the module 68 to the connector 65A, sound is automatically output to the directional speaker 20.
It is switched to fire from.

The main body case 67 of the portable game machine 65
A sight 70 similar to the sight of the gun, which is the sight of the present invention, is provided on both surfaces of the module and the module 68. The sight 70 is composed of two projections 70A and 70B, and the two projections 70A and 70B and the part of the target direction to which the sound wave is to be reached are arranged so as to be located on a straight line to determine the sight. , The operation means 67B of the game
By the operation described above, it is possible to accurately emit a sound wave toward a part to be reached (for example, an ear of a person to be heard).

The module 66 is connected to the connector 65A.
The connector 65A has a cassette 69 containing a semiconductor memory in which game information such as a game program is stored.
It can also be connected instead. By connecting the cassette 69 in place of the module 66, a game control circuit (not shown) provided in the main body case 67 displays game information on the liquid crystal display 67A based on the game information stored in the cassette 69. Is displayed, and a sound synchronized with the game information is generated by the speaker 57.

The above-described directional speaker may be employed as the speaker 57. In this case, the position where the directional speaker 57 is provided
While the game player holds the liquid crystal display 6
It is important to arrange the game information displayed on 7A so that it can be visually recognized and the sound of the speaker 57 can be heard. This is because the directional speaker 57 has strong directivity, and there is a possibility that sound may not be heard during game play depending on the mounting position of the speaker.

Specifically, the following configuration is adopted. That is, a portable game machine having a case 67, a liquid crystal display 67A provided on a front surface 67D of the case 67 for displaying game information, and a game control circuit and an internal power supply inside the case 67, A super directional speaker 57 is provided on a surface 67D of a case 67 provided with the liquid crystal display 67A, and the case 67 is gripped by a game player, and the super directional speaker 57 is displayed while visually recognizing game information displayed on the liquid crystal display 67A. Speaker 5
7, so that sound can be heard.

In the second embodiment, the main body case 67 and the module case 68 are formed separately, but it is needless to say that the present invention is not limited to such a structure and may be formed integrally.

[0051]

According to the present invention configured as described above, a previously stored sound is reproduced by the super-directional speaker, and the stored sound is reproduced only by a specific person or an animal having a specific hearing. It can offer a whole new fun that can be heard.

Further, by providing a microphone, it is possible to record its own voice in advance or on the spot, and make the recorded sound be heard only by a specific person or an animal having a specific hearing. Can be.

Further, by providing the sight, it is possible to accurately emit a sound wave in a target direction. Since the sound emitted from the super-directional speaker is invisible and the person using the portable device is almost inaudible, the aim can be more accurately determined by using such a sight. Can be fired.

Further, a directional speaker is provided on the case body of the portable game machine so that game sounds synchronized with the game information of the portable game machine can be heard. The game can be performed with little risk of inconvenience.

By employing a parametric speaker as the super-directional speaker, it becomes possible to emit a sound wave having a very strong directivity in one direction similar to an ultrasonic wave in a targeted direction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a voice recorder according to Embodiment 1 of the present invention.

FIG. 2 shows a control block diagram of the portable device shown in FIG. 1.

FIG. 3 is an explanatory diagram for explaining the principle of a parametric speaker.

FIG. 4 is a plan view of a portable game machine according to Embodiment 2 of the present invention.

FIG. 5 is an upper side view of FIG. 4.

FIG. 6 is an upper side view in a state where a module is attached to the portable game machine.

FIG. 7 is a left side view of FIG. 6.

[Explanation of symbols]

 Reference Signs List 20 superdirective speaker 47 sight 50 voice recorder 51 case body 60 microphone 65 portable game machine 67 body case 68 module Case 70: sight

Claims (5)

[Claims] 1. A portable device including a case and a speaker provided with an internal power supply, a sound storage medium, and a super-directional speaker inside the case, wherein the super-directional speaker includes the power source. A portable device equipped with a speaker, characterized in that sound waves capable of propagating in a direction aimed at the sound stored in the sound storage medium can be emitted to the outside. 2. A microphone is provided in the case,
The speaker according to claim 1, wherein the microphone is configured to record sound on the storage medium, and the sound recorded by the microphone is reproduced by the super-directional speaker. Portable equipment. 3. The sighting device according to claim 1, wherein a sight is provided on a surface of the case so that a user can aim at a direction in which sound is propagated so as to emit the sound wave. A portable device comprising the speaker according to any of the claims. 4. A portable game machine comprising: a case; a liquid crystal display provided on a surface of the case for displaying game information; and a game control circuit and an internal power supply inside the case. A super directional speaker is provided on the surface of a case provided with a display, and the case is grasped by a game player, so that sound can be heard by the super directional speaker while visually recognizing game information displayed on the liquid crystal display. A portable device that is a portable game machine characterized by having the following configuration. 5. The portable device provided with the speaker according to claim 1, wherein the super directional speaker is a parametric speaker.