JP2008028573A - Microphone apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microphone apparatus whereby sound can similarly be received from any direction and singing can be attained by easily grasping sound output from a speaker. <P>SOLUTION: The microphone apparatus 10 is provided with a microphone 22 and the speaker 24 with directivity, which are adjacently located. The microphone apparatus 10 is provided with a sound signal processing circuit for outputting sound from the speaker 24 and a howling eliminating circuit for reducing howling caused by the sound received by the microphone 22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a microphone device provided with a speaker together with a microphone.

  Some household karaoke devices use a television or a stereo device as a device for outputting sound. For example, the karaoke apparatus outputs an audio signal and an image (video) signal to a television apparatus, thereby outputting audio from a speaker of the television apparatus and displaying an image (video) on a display. In such a karaoke system, it is necessary to output at such a volume that the singer can sufficiently hear the karaoke voice. However, in general homes where sufficient soundproofing facilities are not provided, the volume is often lowered so as not to disturb the neighborhood due to noise, and it becomes impossible to sing as much as possible.

Conventionally, there has been considered a microphone device that allows the user to hear the guide sound from the speaker without making the speaker inconspicuous and to prevent the guide sound from the speaker from being heard by the audience around the user. (See Patent Document 1). A microphone device described in Patent Document 1 includes a gripping microphone device body provided with a microphone that converts sound generated by sound waves into a sound signal, guide sound input means for inputting a sound signal of guide sound, and a gripping microphone device. A speaker that is provided integrally with the main body, converts a sound signal of the guide sound from the guide sound input means to a sound wave of the guide sound, and outputs the sound with a directivity in a specific direction with respect to the gripping microphone device main body; Is provided.
JP 2003-84782 A

  In the conventional microphone device described in Patent Document 1, a speaker is integrally provided with a microphone in the device body, and a soundproof plate for preventing sound from the speaker from being input to the microphone is provided between the speaker and the microphone. Is provided. Since the soundproof board is provided to prevent the sound from wrapping around, if the side on which the speaker is provided is directed toward the mouth by the singer, it becomes difficult for the sound to be input by the microphone. Therefore, when using the microphone device, the singer must use the microphone provided so that the side on which the microphone is provided is consciously directed toward his / her mouth.

  Further, the conventional microphone device only makes it difficult for the sound output from the speaker by the soundproof plate to be input by the microphone, and there is a risk that howling will occur if the volume of the sound output from the speaker increases. Also, if the volume is reduced so that howling does not occur, it is difficult to hear the sound output from the speaker, making singing difficult.

  The present invention has been made in consideration of the above-described circumstances, and the purpose of the present invention is to input voice in the same way from any direction and to easily sing and sing the voice output from the speaker. An object of the present invention is to provide a microphone device that can perform the above-described operation.

  The present invention reduces an acoustic input unit in which a microphone and a directional speaker are provided adjacent to each other, an audio signal processing circuit that outputs audio from the speaker, and howling generated by audio input from the microphone. And a howling removal circuit.

  Preferably, the audio signal processing circuit further includes an audio switching switch for switching a type of audio output from the speaker, and the audio signal processing circuit is configured to output audio output from the speaker in response to switching by the audio switching unit. It is characterized by switching the type.

  Preferably, the rhythm detection means for detecting the rhythm of the voice based on the voice signal of the voice output from the speaker by the voice signal processing circuit, the vibrator for generating vibration, and the rhythm detection means Vibrator driving means for driving the vibrator according to the detected rhythm is provided.

  Preferably, the speaker provided in the voice input unit and the microphone are provided in different directions.

  According to the present invention, by providing a directional speaker, it is possible to make it difficult for sound output from the speaker to be input by the microphone, and a soundproof plate or the like is interposed between the microphone and the speaker. Thus, even if the microphone device is used in any direction, sound can be input in the same way from any direction. In addition, since a howling removal circuit is provided, even if the volume of the sound output from the speaker is increased, the occurrence of howling can be suppressed, and it is possible to sing by arbitrarily outputting the sound at a volume that is easy to hear. It becomes.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating an external configuration of a microphone device 10 according to the present embodiment. The microphone device 10 shown in FIG. 1 is provided with a voice input / output unit 12 and a gripping unit 14. The grip 14 is a portion that is held by a singer at the time of use, and is formed in a substantially cylindrical shape. A voice input / output unit 12 is provided at one end of the gripping unit 14.

  The voice input / output unit 12 is provided with a plane part orthogonal to the axial direction of the gripping part 14, and a microphone 22 and a speaker 24 are provided adjacent to the plane part. The voice input / output unit 12 is equipped with a windshield 20 made of a metal mesh or the like for covering the microphone 22 and the speaker 24 provided on the flat part.

  The speaker 24 is configured in a thin shape and has directivity. The microphone 22 is provided, for example, at the tip of a cylindrical member.

  FIG. 2A is a side view of the microphone 22 and the speaker 24 provided on the plane portion of the voice input / output unit 12 as seen from a direction parallel to the plane portion. As shown in FIG. 2A, since the microphone 22 is provided at the tip of the cylindrical member, for example, a soundproof plate or the like is provided between the microphone 22 and the speaker 24 to block sound. In other words, the sound output from the speaker 24 is difficult to be input by the microphone 22. Further, since the microphone 22 is provided at the tip of the cylindrical member, it is possible to input sound in the same manner from any direction around the sound input / output unit 12.

  In FIG. 1 and FIG. 2A, the microphone 22 and the speaker 24 are provided on the flat portion provided in the voice input / output unit 12, but for example, as shown in FIG. 2B, the speaker 24 and the microphone are provided. By providing an angle on each surface where 22 is provided, the direction of the speaker 24 and the microphone 22 provided in the voice input / output unit 12 can be made different. Thereby, the sound output from the directional speaker 24 can be more difficult to be input from the microphone 22.

  The audio input / output unit 12 is provided with a volume adjustment knob 26. The volume adjustment knob 26 is used to adjust the volume output from the speaker 24.

  The voice changeover switch 28 is provided with a voice changeover switch 28 and a vibrator switch 30. The audio switch 28 is a switch for switching the type of audio output from the speaker 24 as well as switching on / off the power of the microphone device 10. The voice changeover switch 28 can arbitrarily slide the slide type knob to any one of “OFF”, “1”, “2”, and “3” positions. When there is a knob at the “OFF” position, the power of the microphone device 10 is turned off. Different sound types are set at the positions “1”, “2”, and “3”, and the sound output from the speaker 24 is switched depending on which position the knob is slid. For example, as the type of sound switched by the sound changeover switch 28, the same sound as the karaoke sound output from an external speaker 38 (described later) (corresponding to the position "1"), the melody line of the karaoke sound and the microphone 22 are used. It is assumed that there is a voice (corresponding to the position “2”) obtained by mixing the voice inputted from the voice (corresponding to the position “3”), and only a voice obtained by adding an effect such as an echo to the voice inputted from the microphone 22. . It should be noted that other types of sound can be output and can be switched by a switching operation of the sound switch 28.

  The vibrator switch 30 is a switch for switching on / off a vibrator unit 34 connected to the main body of the microphone device 10 via a cord 32. The vibrator unit 34 generates vibration according to the sound output from the speaker 24 when the vibrator switch 30 is turned on. For example, the vibrator unit 34 is detected based on the sound signal of the sound output from the speaker 24. It is controlled to vibrate according to the rhythm. The vibrator unit 34 is used, for example, by being held by a hand opposite to the hand of the singer holding the grip 14.

  Note that the microphone device 10 is provided with an interface unit (not shown) for wireless or wired connection with a playback device 36 such as a karaoke device or a DVD device for transmitting and receiving audio signals.

  Next, the circuit configuration of the microphone device 10 will be described. FIG. 3 is a block diagram showing a circuit configuration of the microphone device 10.

  The microphone device 10 includes an audio signal processing circuit that outputs audio from the speaker 24. As shown in FIG. 3, the ATT 40, the microphone amplifier 41, the effect processing circuit 42, the mixing circuit 44, the mixer 45 with switching, An ATT 46, a howling removal circuit 47, an amplifier 48, and a vibrator control unit 50 are provided.

  The ATT 40 limits (attenuates) the audio signal input from the microphone 22 and adjusts it to an appropriate size. The microphone amplifier 41 amplifies the audio signal input through the ATT 40 and outputs it to the effect processing circuit 42 and the mixer 45 with switching.

  The effect processing circuit 42 executes processing for adding various effects to the audio signal. For example, the effect processing circuit 42 generates and outputs an audio signal obtained by echoing the voice of the singer input from the microphone 22. The effect processing circuit 42 may perform a plurality of types of effect processing in addition to the echo, and may switch the effect processing according to an operation of a changeover switch (not shown).

  The mixing circuit 44 transmits and receives audio signals to and from the external playback device 36, mixes audio signals input from the effect processing circuit 42 and audio signals input from the playback device 36, and switching operation of the vibrator switch 30. The output of the audio signal to the vibrator control unit 50 is switched.

  The mixer 45 with switching switches the type of sound output from the speaker 24 in accordance with the switching of the sound switch 28. For example, when the audio switch 28 is switched to the “1” position, only the audio signal input from the playback device 36 through the mixing circuit 44, that is, the karaoke audio output from the external speaker 38 (described later). Only the same audio signal is output. When the voice changeover switch 28 is switched to the position “2”, the voice signal of the melody line of the karaoke voice input through the mixing circuit 44 and the voice signal input from the microphone 22 are mixed and output. When the audio switch 28 is switched to the “3” position, only an audio signal in which an effect such as an echo is added to the audio input from the microphone 22 by the effect processing circuit 42 is output.

  The ATT 46 limits (attenuates) the audio signal output from the mixer 45 with switching and adjusts it to an appropriate size.

  The howling removal circuit 47 reduces the occurrence of howling by attenuating a specific frequency that causes howling (feedback), for example, with respect to the audio signal input through the ATT 46. In the configuration shown in FIG. 3, howling is reduced by reducing the frequency of the audio signal output from the speaker 24, but howling may be reduced by other methods. . For example, it is possible to limit the volume so that no howling occurs, or to output the sound with a slight delay using a delay.

  The amplifier 48 amplifies the audio signal input through the howling removal circuit 47 so that the audio is output from the speaker 24 at a volume corresponding to the setting of the volume adjustment knob 26, and drives the speaker 24 to output the audio. .

  Based on the audio signal output from the mixing circuit 44, the vibrator control unit 50 detects, for example, a rhythm of a rhythm instrument sound unit included in the sound output from the speaker 24, and controls the vibrator unit 34 according to this rhythm. To drive. The vibrator control unit 50 is provided with a rhythm detection circuit 50a and a vibrator drive circuit 50b.

  The rhythm detection circuit 50a detects a sound signal corresponding to the rhythm instrument sound section by, for example, passing the sound signal through a low-pass filter in order to detect the rhythm of the rhythm instrument sound section. The rhythm detection circuit 50a detects the timing of the sound emitted by a rhythm instrument, for example, a low music instrument such as a drum or bass, from the change in the signal that has passed through the low-pass filter, and generates a signal indicating the rhythm of the sound output from the speaker 24. To do. The vibrator drive circuit 50b drives the vibrator unit 34 in accordance with a signal indicating the rhythm of the sound generated by the rhythm detection circuit 50a.

  The playback device 36 outputs a sound signal (including a sound signal of a melody line) to the microphone device 10 and also inputs a sound signal of a sound (singing sound) input from the microphone device 10 (microphone 22). Then, it is mixed with the karaoke sound from the speaker 38 and output. Further, the monitor device 39 outputs an image (video) included in the karaoke content in parallel with the reproduction of the karaoke sound.

Next, operations and effects of the microphone device 10 according to the present embodiment will be described.
When the microphone device 10 is used, it is connected to the playback device 36 wirelessly or by wire. The microphone device 10 can perform voice input from the microphone 22 and voice output from the speaker 24 by moving the voice changeover switch 28 from the “OFF” position to the “1” position, for example. When the sound changeover switch 28 is at the position “1”, the mixer 45 with changeover outputs only the sound signal input through the mixing circuit 44 to the ATT 46, so that only the karaoke sound input from the playback device 36 is output to the speaker. 24.

  By providing the speaker 24 in the microphone device 10, karaoke voice is output from the vicinity of the singer, so that the karaoke voice can be easily confirmed even if the volume is not high. Since the singer can check and sing the karaoke sound output from the speaker 24 provided in the microphone device 10, it is necessary to output the karaoke sound at a high volume from the speaker 38 provided outside the playback device 36. Disappears.

  Also, as shown in FIGS. 1 and 2, since the microphone 22 is provided at the tip of a cylindrical member protruding from the flat surface where the speaker 24 is provided, the sound output from the directional speaker 24 Is difficult to be input to the microphone 22, and howling can be prevented. In particular, as shown in FIG. 2B, by providing an angle in the direction of the microphone 22 and the speaker 24, the sound output from the speaker 24 can be made difficult to be input to the microphone 22. Further, even if the sound output from the speaker 24 is input to the microphone 22, howling is suppressed by the howling removal circuit 47.

  Further, since the howling removal circuit 47 is provided, there is no need to provide a soundproofing plate or the like for preventing howling between the microphone 22 and the speaker 24, and the microphone 22 is provided at the tip of the cylindrical member. Therefore, voice input can be performed in the same manner from any direction around the voice input / output unit 12 of the microphone device 10. For this reason, since either side of the voice input / output unit 12 may be directed to the mouth when holding the gripping part 14, the handling of the microphone device 10 can be facilitated.

  Further, by switching the voice changeover switch 28, not only the karaoke voice is output from the speaker 24, but also, for example, another type of voice required by the singer can be output. That is, by switching the voice changeover switch 28 to the position “2”, the voice inputted from the microphone 22 (sung) can be outputted from the speaker 24 together with the voice of the melody line of the karaoke voice. Therefore, even a song that is not well known can be easily sung while referring to the sound of the melody line. Further, by switching the voice changeover switch 28 to the position “3”, an echo can be added to the voice inputted from the microphone 22 and outputted from the speaker 24. Therefore, it is possible to sing comfortably while listening to the echoed sound output from the speaker 24.

  In the microphone device 10 of the present embodiment, the type of sound desired by the singer can be output from the speaker 24 by operating the audio switch 28 regardless of the sound output from the speaker 38 by the playback device 36. it can. Also, the sound output from the speaker 24 can be heard only by a singer by adjusting the volume adjustment knob 26.

  Further, the microphone device 10 in the present embodiment is provided with a vibrator unit 34. By turning on the vibrator switch 30, the vibrator unit 34 can be vibrated according to the rhythm of the sound output from the speaker 24 (timing of the sound emitted by the low music instrument). As a result, even if it is difficult to obtain the rhythm of the music only with the sound output from the speaker 24, the rhythm can be surely grasped by grasping the vibrator unit 34 and feeling the vibration.

  In the above-described embodiment, the audio signal is input from the playback device 36 (karaoke device, DVD device, etc.). However, the recording medium (card type memory, etc.) can be further attached and removed to perform recording. For example, voice data (karaoke data) based on, for example, MIDI (musical instruction digital interface) data recorded on a medium may be read, converted into a voice signal, and output from the speaker 24.

  In this configuration, the vibrator control unit 50 does not detect a rhythm based on an analog audio signal, but rhythmic data included in audio data (MIDI data), for example, part data such as a drum and a bass. It is possible to detect the rhythm based on this.

  In the configuration illustrated in FIG. 3, the microphone device 10 is described as receiving an analog audio signal from the playback device 36, but may be configured to input music data. The microphone device 10 generates an audio signal according to the input audio data and outputs it from the speaker 24, and drives the vibrator unit 34 by the vibrator controller 50 as described above based on the audio data.

  1 and 3, the vibrator unit 34 is provided outside the housing of the microphone device 10, but may be provided inside the housing of the microphone device 10.

  In the above description, the type of sound output from the speaker 24 is described as being switched by the sound changeover switch 28, but may be switched in the playback device 36 that outputs the sound signal. The mixer 45 with switching of the microphone device 10 mixes and outputs the audio signal input through the mixing circuit 44 in accordance with the switching of the audio switch 28.

  Further, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The figure which shows the external appearance structure of the microphone apparatus 10 in this embodiment. The side view which shows the microphone 22 and the speaker 24 which were provided in the audio | voice input / output part 12. FIG. 1 is a block diagram showing a circuit configuration of a microphone device 10 in the present embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Microphone apparatus, 12 ... Audio | voice input / output part, 14 ... Grasping part, 20 ... Windshield, 22 ... Microphone, 24 ... Speaker, 26 ... Volume control knob, 28 ... Voice selector switch, 30 ... Vibrator switch, 32 ... Code, 34 ... Vibrator unit, 36 ... Playback device, 38 ... Speaker, 39 ... Monitor device, 40, 46 ... ATT, 41 ... Microphone amplifier, 42 ... Effect processing circuit, 44 ... Mixing circuit, 45 ... Mixer with switching, 47 ... Howling Removal circuit, 48... Amplifier, 50... Vibrator control unit, 50 a... Rhythm detection circuit, 50 b.

Claims (4)

An audio input unit in which a microphone and a directional speaker are provided adjacent to each other;
An audio signal processing circuit for outputting audio from the speaker;
A microphone device comprising: a howling removal circuit for reducing howling generated by sound input from the microphone. A voice switch for switching the type of voice output from the speaker;
The audio signal processing circuit is
2. The microphone device according to claim 1, wherein the type of sound output from the speaker is switched in accordance with switching by the sound switching means. Rhythm detection means for detecting the rhythm of the voice based on the voice signal of the voice output from the speaker by the voice signal processing circuit;
A vibrator that generates vibration;
The microphone device according to claim 1, further comprising a vibrator driving unit that drives the vibrator in accordance with a rhythm detected by the rhythm detection unit.   The microphone device according to claim 1, wherein the speaker provided in the voice input unit and the microphone are provided in different directions.

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