WO2013098974A1 - Portable audio playback device - Google Patents
Portable audio playback device Download PDFInfo
- Publication number
- WO2013098974A1 WO2013098974A1 PCT/JP2011/080327 JP2011080327W WO2013098974A1 WO 2013098974 A1 WO2013098974 A1 WO 2013098974A1 JP 2011080327 W JP2011080327 W JP 2011080327W WO 2013098974 A1 WO2013098974 A1 WO 2013098974A1
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- WO
- WIPO (PCT)
- Prior art keywords
- earphone
- terminal
- audio
- connection plug
- signal
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
- H04R2225/61—Aspects relating to mechanical or electronic switches or control elements, e.g. functioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
Definitions
- the present invention relates to a portable audio reproducing apparatus that reproduces an audio signal using an earphone.
- a portable audio reproducing device lent in a group trip is required to switch the audio amplification mode corresponding to a hearing impaired person and a general person. That is, when lending a portable audio player, it is required to set the volume corresponding to the hearing impaired person or the general public. For example, since it is difficult for elderly people to hear sounds in the high frequency range, it is preferable to increase the volume of the high frequency range.
- Patent Document 1 discloses a technique that allows an elderly person to easily adjust the volume.
- An object of the present invention is to provide a portable audio reproduction device that can easily switch the audio amplification mode corresponding to a hearing-impaired person and a general person.
- One embodiment of the present invention is a portable audio reproduction device that reproduces an audio signal with an earphone, and includes an apparatus main body, a first earphone, and a second earphone, and the apparatus main body reproduces the audio signal. And a jack that can be connected to both the first connection plug of the first earphone and the second connection plug of the second earphone, and the first connection plug of the first earphone is
- the second connection plug of the second earphone includes a second common terminal, a second input terminal, the second common terminal, and the second input terminal.
- an audio dummy circuit wherein the audio reproduction circuit is configured to detect sound based on detection of the presence or absence of the dummy terminal when the first connection plug or the second connection plug is inserted into the jack.
- the dummy terminal is provided only in the second earphone out of the first earphone and the second earphone. Then, the sound amplification mode of the sound signal is switched based on the detection of the presence / absence of the dummy terminal. For this reason, the general person and the hearing impaired person can switch the sound amplification mode by selecting the first earphone and the second earphone. That is, an audio signal can be reproduced in an audio amplification mode corresponding to the selected earphone without performing an operation such as setting change in the apparatus main body.
- the audio reproduction circuit increase the amplification factor of the audio signal in a high frequency region when the dummy terminal is detected than when the dummy terminal is not detected.
- the audio reproduction circuit preferably increases the amplification factor of the audio signal in a high frequency region than when the dummy terminal is detected.
- the audio reproduction circuit compresses the dynamic range of the audio signal when the dummy terminal is detected than when the dummy terminal is not detected.
- the audio reproduction circuit compresses the dynamic range of the audio signal when the dummy terminal is not detected than when the dummy terminal is detected.
- the first earphone and the second earphone have different forms in appearance.
- the adapter further comprises an adapter that can be connected to the second connection plug and has the same terminal structure as the first connection plug, and the adapter is connected to the second connection plug, whereby the second earphone. Preferably function as the first earphone.
- the present invention it is possible to provide a portable audio playback device that can easily switch the audio amplification mode corresponding to a hearing-impaired person and a general person.
- voice reproduction apparatus which concerns on 1st Embodiment.
- the circuit diagram when the earphone for ordinary people is connected to the apparatus main body in 1st Embodiment.
- the circuit diagram when the earphone for a hearing impaired person is connected to the apparatus main body in 1st Embodiment.
- the circuit diagram when the earphone for general people is connected to the apparatus main body.
- the circuit diagram when the earphone for a hearing impaired person is connected to the apparatus main body in 2nd Embodiment.
- Sectional drawing which shows an adapter in 3rd Embodiment.
- the portable audio reproduction device 1 shown in the present embodiment is a receiver that receives a signal transmitted from a transmitter, reproduces the received signal as an audio signal, and reproduces the audio signal with an earphone.
- the portable audio reproduction device 1 is used as a receiver used by a guided person when, for example, guidance of a sightseeing spot, a museum, etc., the voice of the guide is transmitted by a transmitter.
- the guided person listens to the sound reproduced by the receiver with the earphone.
- the portable audio playback device 1 that plays back a monaural signal will be described.
- the portable audio playback device 1 includes a device body 2, a general-purpose earphone 10 (first earphone), and a hearing-impaired earphone 20 (second earphone).
- a volume switch 3 that also serves as a power switch is attached to the side surface of the apparatus body 2.
- the general-purpose earphone 10 is an earphone used by a general person whose hearing ability is within a reference range.
- the general-purpose earphone 10 includes a speaker 12, a conducting wire 11 for transmitting an audio signal, and a connecting plug 13 (first connecting plug) to which the conducting wire 11 is connected.
- a visual recognition tag 14 indicating the general-purpose earphone 10 is attached to the lead wire 11 of the general-purpose earphone 10 so that the general-purpose earphone 10 and the hearing-impaired earphone 20 can be easily distinguished. .
- the hearing-impaired earphone 20 is an earphone used by a hearing-impaired person whose hearing ability is lower than that of an ordinary person. For example, the use of a hearing impaired person whose hearing ability has decreased due to an elderly person or a disease is assumed.
- the earphone 20 for the hard of hearing includes a speaker 22, a conductive wire 21 that transmits an audio signal, and a connection plug 23 (second connection plug) to which the conductive wire 21 is connected.
- a visual recognition tag 24 indicating the earphone 20 for the deaf person is attached to the lead wire 21 of the earphone 20 for the deaf person so that the earphone 20 for the deaf person and the earphone 10 for the general person can be easily distinguished. .
- the device main body 2 of the portable audio playback device 1 will be described.
- the apparatus main body 2 amplifies the sound based on the reception function for receiving the signal transmitted from the transmitter, the reproduction function for reproducing the received signal (hereinafter, received signal), and the type of the earphone inserted into the jack 90. And a playback function for playing back an audio signal by switching modes.
- the apparatus body 2 includes an antenna 4 that receives a transmission signal, an audio reproduction circuit 5 that detects and demodulates the reception signal, and a jack 90 that outputs an audio signal.
- the audio reproduction circuit 5 includes a detection circuit 30 that detects a predetermined frequency signal, a squelch circuit 40 that cuts off the output of the audio signal, an audio processing circuit 50 that amplifies the audio signal in a predetermined manner, and an amplifier 60 that amplifies the audio signal. And a plug determination circuit 70 that determines the type of the plug, and a control device 80 that gives an instruction to switch the function of the audio processing circuit 50.
- the detection circuit 30 detects a predetermined frequency signal from the received signal and demodulates the detection signal to obtain an audio signal. For example, the received signal and a predetermined oscillation signal are mixed to form an intermediate signal, and the intermediate signal is amplified. Next, the FM signal is detected from the intermediate signal, and the FM signal is demodulated. Further, the demodulated FM signal is amplified to form an audio signal.
- the squelch circuit 40 includes a tone detector 41, a noise detector 42, a carrier detector 43, an AND circuit 44, and a squelch switch 45.
- the tone detector 41 detects a tone signal from the audio signal. When a tone signal is detected, the output voltage of the output port is set to a high level.
- the noise detection unit 42 detects the noise level from the audio signal. When the noise level is lower than the set value, the output voltage of the output port is set to high level.
- the carrier detection unit 43 detects the level of the carrier signal of the received signal. When the level of the carrier signal is larger than the set value, the output voltage of the output port is set to a high level.
- the AND circuit 44 turns on the squelch switch 45 when all the output voltages of the output port of the tone detector 41, the output port of the noise detector 42, and the output port of the carrier detector 43 are high. Is output. In addition, the AND circuit 44 outputs an off signal for turning off the squelch switch 45 under other conditions.
- the squelch switch 45 has an on state and an off state. In the on state, the audio signal is passed. In the off state, no audio signal is passed. For example, when the tone signal is detected, the noise level is lower than the set value, and the carrier signal level is higher than the set value, all of these conditions are satisfied, the squelch switch 45 is turned on. An audio signal is output. On the other hand, when at least one of these conditions is not satisfied, the squelch switch 45 is turned off and no audio signal is output.
- the audio processing circuit 50 amplifies the audio signal according to the type of the plug connected to the jack 90. Specifically, when the connection plug 13 of the general-purpose earphone 10 is connected to the jack 90, the audio signal is amplified with a substantially constant amplification factor over the entire sound range. In the following description, this processing is referred to as normal processing.
- the audio signal is amplified with a gain substantially equal to that of the normal processing in the low sound range, and higher than the normal processing in the high sound range. Amplify the audio signal.
- This high frequency range is set to a frequency band that makes it difficult for the elderly to hear, for example, 4 kHz or more.
- the low frequency range is less than 4 kHz. In the following description, this processing is referred to as high frequency amplification processing.
- the jack 90 can be connected to both plugs of the connection plug 13 of the general-purpose earphone 10 and the connection plug 23 of the hard-of-hearing earphone 20. That is, the number of the jacks 90 provided in the apparatus main body 2 is one, and it is commonly used for the earphones 10 for the general public and the earphones 20 for the deaf.
- the plug determination circuit 70 determines whether the plug inserted into the jack 90 is the connection plug 13 of the general-purpose earphone 10 or the connection plug 23 of the hard-of-hearing earphone 20.
- the plug determination circuit 70 determines that the plug inserted into the jack 90 is the connection plug 23 of the earphone 20 for the deaf, the output voltage of the output port is set to a high level.
- the plug determination circuit 70 sets the output voltage of the output port to a low level.
- the control device 80 issues a command to the sound processing circuit 50 based on the output voltage of the plug determination circuit 70.
- the control device 80 when the output voltage of the output port of the plug determination circuit 70 is at a high level, that is, when the connection plug 23 of the earphone 20 for the hearing impaired person is inserted into the jack 90, the control device 80 includes the audio processing circuit 50. A control signal for executing the high frequency amplification process is output to
- the control device 80 is normally connected to the audio processing circuit 50. A control signal for executing the process is issued.
- connection plug 13 of the general-purpose earphone 10 the connection plug 23 of the hearing-impaired earphone 20, and the jack 90 will be described.
- the plug based on standards, such as a phone terminal can be used as each connection plug 13 and 23, the plug based on standards, such as a phone terminal.
- connection plug 13 (first connection plug) of the general-purpose earphone 10 includes a first common terminal 13A and a first input terminal 13B.
- the first input terminal 13B is provided at the tip of the connection plug 13.
- the first input terminal 13 ⁇ / b> B is connected to one terminal of the speaker 12.
- the first common terminal 13 ⁇ / b> A is provided at the base of the connection plug 13.
- the first common terminal 13 ⁇ / b> A is connected to the other terminal of the speaker 12.
- connection plug 23 (second connection plug) of the hearing aid earphone 20 includes a second common terminal 23A, a second input terminal 23B, and a dummy terminal 23C.
- the second input terminal 23B is provided at the tip of the connection plug 23.
- the second input terminal 23 ⁇ / b> B is connected to one terminal of the speaker 22.
- the second common terminal 23 ⁇ / b> A is provided on the base side of the connection plug 23.
- the second common terminal 23 ⁇ / b> A is connected to the other terminal of the speaker 22.
- the dummy terminal 23C is provided between the second input terminal 23B and the second common terminal 23A.
- the dummy terminal 23 ⁇ / b> C is substantially insulated from the second input terminal 23 ⁇ / b> B, the second common terminal 23 ⁇ / b> A, and the speaker 22.
- the jack 90 includes a common electrode 91, an input electrode 92, and a dummy electrode 93.
- the common electrode 91 contacts the first common terminal 13A when the connection plug 13 of the general-purpose earphone 10 is inserted into the jack 90 (see FIG. 3), and the connection plug 23 of the deaf earphone 20 is inserted into the jack 90. When this occurs, it contacts the second common terminal 23A (see FIG. 4). The common electrode 91 is connected to the ground.
- the input electrode 92 contacts the first input terminal 13B when the connection plug 13 of the general-purpose earphone 10 is inserted into the jack 90 (see FIG. 3), and the connection plug 23 of the deaf earphone 20 is inserted into the jack 90. When this occurs, it contacts the second input terminal 23B (see FIG. 4).
- the input electrode 92 is connected to the amplifier 60. That is, an audio signal is input to the earphone through the input electrode 92.
- the dummy electrode 93 contacts the first common terminal 13A when the connection plug 13 of the general-purpose earphone 10 is inserted into the jack 90 (see FIG. 3), and the connection plug 23 of the deaf earphone 20 is inserted into the jack 90. When this occurs, it contacts the dummy terminal 23C (see FIG. 4). The dummy electrode 93 is connected to the plug determination circuit 70.
- the plug determination circuit 70 includes a comparator 71.
- a dummy electrode 93 is connected to the comparator 71.
- the dummy electrode 93 is connected to a reference potential Vcc line through a resistor 72.
- the comparator 71 compares the potential of the dummy electrode 93 (hereinafter, dummy potential Vd) with a preset comparison potential Vref. When the dummy potential Vd is higher than the comparison potential Vref, the comparator 71 sets the output voltage of the output port to a high level. Set to. On the other hand, when the dummy potential Vd is equal to or lower than the comparison potential Vref, the output voltage of the output port is set to a low level.
- the comparison potential Vref is larger than the ground potential and smaller than the reference potential Vcc of the control device 80.
- the output port of the comparator 71 is connected to the control device 80.
- the control device 80 outputs a control signal to the effect that the high frequency amplification process or the normal process is executed to the audio processing circuit 50 based on the output voltage of the output port of the plug determination circuit 70.
- the audio processing circuit 50 includes an operational amplifier 54, three resistors 51, 52, and 53, a capacitor 55, and a switch element 56.
- the resistance value of the resistor 51 is R1
- the resistance value of the resistor 52 is R2
- the resistance value of the resistor 53 is R3
- the combined resistance of the resistors 52 and 53 connected in parallel is R23.
- the output terminal of the operational amplifier 54 is connected to the amplifier 60.
- An audio signal is input to the plus input terminal of the operational amplifier 54.
- a resistor 51 is connected between the output terminal and the negative input terminal of the operational amplifier 54.
- a resistor 52 is connected between the negative input terminal of the operational amplifier 54 and the ground.
- a capacitor 55 and a resistor 53 are connected in series to the negative input terminal of the operational amplifier 54 in parallel with the resistor 52.
- a switch element 56 is provided between the capacitor 55 and the resistor 53.
- the switch element 56 switches the connection state between the capacitor 55 and the resistor 53.
- the switch element 56 disconnects between the capacitor 55 and the resistor 53 when receiving a control signal indicating normal processing from the control device 80. At this time, the gain of the audio processing circuit 50 becomes the set gain G1 at all frequencies.
- the value of the setting gain G1 is approximately (1 + R1 / R2).
- the switch element 56 connects the capacitor 55 and the resistor 53 to each other when receiving a control signal for performing high frequency amplification processing from the control device 80. At this time, the capacitor 55 is connected to the ground via the resistor 53.
- the gain of the audio processing circuit 50 becomes the set gain G2 in the high frequency range.
- the set gain G2 is larger than the set gain G1 and is substantially (1 + R1 / R23).
- the gain of the audio processing circuit 50 is smaller than the set gain G2 in the low frequency range.
- the resistors 51, 52, and 53 and the capacitor 55 are set so that the gain in the low frequency range is larger than the set gain G1 during normal processing.
- the audio processing circuit 50 amplifies the audio signal with the set gain G1 during normal processing.
- the audio signal is amplified with a set gain G2 (> set gain G1) in the high frequency range.
- connection plug 13 of the general-purpose earphone 10 is inserted into the jack 90.
- the common electrode 91 of the jack 90 and the dummy electrode 93 are connected via the first common terminal 13A.
- the potential of the dummy electrode 93 is equal to the ground potential, that is, smaller than the comparison potential Vref. For this reason, the output voltage of the output port of the comparator 71 of the plug determination circuit 70 becomes a low level.
- the control device 80 When the output voltage of the output port becomes low level, the control device 80 outputs a control signal to the effect that the normal processing is executed to the audio processing circuit 50. In response to this control signal, the audio processing circuit 50 disconnects between the capacitor 55 and the resistor 53. In such a circuit state, the audio signal is amplified with the set gain G1 at all frequencies. That is, normal processing is performed on the audio signal.
- connection plug 23 of the earphone 20 for the hearing impaired person is inserted into the jack 90.
- the common electrode 91 and the dummy electrode 93 of the jack 90 do not contact each other.
- the potential of the dummy electrode 93 is equal to the reference potential Vcc, that is, higher than the comparison potential Vref. For this reason, the output voltage of the output port of the comparator 71 of the plug determination circuit 70 becomes high level.
- the control device 80 issues a control signal to the effect that the high frequency amplification processing is executed to the audio processing circuit 50.
- the audio processing circuit 50 places the capacitor 55 and the resistor 53 in a connected state. In such a circuit state, the audio signal is amplified with the set gain G2 (> set gain G1) in the high frequency range. That is, high frequency amplification processing is performed on the audio signal.
- the portable audio playback device 1 having such a configuration operates as follows.
- connection plug 13 of the general-purpose earphone 10 When the connection plug 13 of the general-purpose earphone 10 is inserted into the jack 90, the audio signal is normally processed.
- connection plug 23 of the deaf earphone 20 When the connection plug 23 of the deaf earphone 20 is inserted into the jack 90, the audio signal is subjected to high frequency amplification processing. For this reason, the sound amplification mode of the sound signal is switched by selecting the earphone to be inserted into the jack 90 of the apparatus body 2.
- Such a portable audio player 1 is used as follows.
- the guide gives the portable audio reproducing device 1 to each traveler.
- the device body 2 and the earphone 20 for the hearing impaired person are handed over to a hearing impaired person or a desire person such as an elderly person.
- a device body 2 and a general-purpose earphone 10 are given to a general person.
- Each traveler connects the rented apparatus main body 2 and the earphone 10 or 20.
- the general-purpose earphone 10 and the hearing-impaired earphone 20 are provided with visual tags 14 and 24 for distinguishing between the general-purpose person and the deaf-earing person. For this reason, the guider can easily grasp what kind of voice amplification mode each traveler is listening to the voice guide. The guide can easily determine which earphone the elderly person is using.
- the portable audio reproducing apparatus 1 that reproduces monaural signals has been described.
- a portable audio playback device 1 that plays back a stereo signal will be described.
- a change from the configuration of the first embodiment that occurs with this change will be described.
- symbol is attached
- connection plug 113 (first connection plug) of the general-purpose earphone 110 includes a first common terminal 113A, a first L terminal 113B, and a first R terminal 113C.
- the first L terminal 113B is provided at the tip of the connection plug 113.
- the first common terminal 113 ⁇ / b> A is provided on the base side of the connection plug 113.
- the first R terminal 113C is provided between the first L terminal 113B and the first common terminal 113A.
- the first L terminal 113B is connected to one terminal of the first speaker 112A.
- the first R terminal 113C is connected to one terminal of the second speaker 112B.
- the first common terminal 113A is connected to the other terminal of the first speaker 112A and the other terminal of the second speaker 112B.
- connection plug 123 (second connection plug) of the hearing aid earphone 120 includes a second common terminal 123A, a second L terminal 123B, a second R terminal 123C, and a dummy terminal 123D.
- the second L terminal 123B is provided at the tip of the connection plug 123.
- the second R terminal 123C is disposed next to the second L terminal 123B.
- the dummy terminal 123D is disposed next to the second R terminal 123C.
- the second common terminal 123A is provided at the base of the connection plug 123.
- the second L terminal 123B is connected to one terminal of the first speaker 122A.
- the second R terminal 123C is connected to one terminal of the second speaker 122B.
- the second common terminal 123A is connected to the other terminal of the first speaker 122A and the other terminal of the second speaker 122B.
- the dummy terminal 123D is substantially insulated from the second L terminal 123B, the second R terminal 123C, the first speaker 122A, and the second speaker 122B.
- the jack 190 includes a common electrode 191, an L electrode 192, an R electrode 193, and a dummy electrode 194.
- the common electrode 191 contacts the first common terminal 113A when the connection plug 113 of the general-purpose earphone 110 is inserted into the jack 190 (see FIG. 5), and the connection plug 123 of the deaf earphone 120 is inserted into the jack 190. When this occurs, it contacts the second common terminal 123A (see FIG. 6). The common electrode 191 is connected to the ground.
- the L electrode 192 contacts the first L terminal 113B when the connection plug 113 of the general-purpose earphone 110 is inserted into the jack 190 (see FIG. 5), and the connection plug 123 of the deaf earphone 120 is inserted into the jack 190. Contact the second L terminal 123B (see FIG. 6).
- the L electrode 192 is connected to the first amplifier 141. That is, the L signal is input to the earphone through the L electrode 192.
- the R electrode 193 contacts the first R terminal 113C when the connection plug 113 of the general-purpose earphone 110 is inserted into the jack 190 (see FIG. 5), and the connection plug 123 of the deaf earphone 120 is inserted into the jack 190. Contact with the second R terminal 123C (see FIG. 6).
- the R electrode 193 is connected to the second amplifier 142. That is, the R signal is input to the earphone through the R electrode 193.
- the dummy electrode 194 contacts the first common terminal 113A when the connection plug 113 of the general-purpose earphone 110 is inserted into the jack 190 (see FIG. 5), and the connection plug 123 of the deaf earphone 120 is inserted into the jack 190. When it is touched, it contacts the dummy terminal 123D (see FIG. 6). The dummy electrode 194 is connected to the plug determination circuit 70.
- the apparatus body 2 detects a predetermined frequency signal from the received signal, and forms an L signal and an R signal from the detected signal.
- the device body 2 includes a plug determination circuit 70 and a control device 80.
- the plug determination circuit 70 and the control device 80 have the same configuration as the plug determination circuit 70 and the control device 80 of the first embodiment. That is, the plug determination circuit 70 sets the output voltage of the output port to a high level or a low level based on the result of whether or not the potential of the dummy terminal 123D is larger than the comparison potential.
- the control device 80 outputs a control signal for executing either high-frequency amplification processing or normal processing to the first audio processing circuit 151 and the second audio processing circuit 152 based on the output voltage of the plug determination circuit 70.
- the same control signal is output to the first audio processing circuit 151 and the second audio processing circuit 152.
- the L signal is amplified by the first sound processing circuit 151 and subsequently amplified by the first amplifier 141.
- the R signal is amplified by the second audio processing circuit 152 and subsequently amplified by the second amplifier 142.
- the first sound processing circuit 151 and the second sound processing circuit 152 have the same circuit configuration as the sound processing circuit 50. That is, the L signal or the R signal is amplified in a sound reproduction form corresponding to the control signal from the control device 80.
- connection plug 113 of the general-purpose earphone 110 is inserted into the jack 190 will be described with reference to FIG.
- the common electrode 191 and the dummy electrode 194 of the jack 190 are connected to each other via the first common terminal 113A.
- the potential of the dummy electrode 194 is equal to the ground potential, that is, smaller than the comparison potential Vref. For this reason, the output voltage of the output port of the plug determination circuit 70 becomes a low level.
- the control device 80 Based on the output voltage of the output port becoming a low level, the control device 80 outputs a control signal to the effect that the normal processing is executed to the first sound processing circuit 151 and the second sound processing circuit 152.
- the L signal and the R signal are amplified with the set gain G1 at all frequencies. That is, normal processing is performed on the L signal and the R signal.
- connection plug 123 of the earphone 120 for the hearing impaired person is inserted into the jack 190.
- the control device 80 issues a control signal to the first audio processing circuit 151 and the second audio processing circuit 152 to execute high frequency amplification processing.
- the L signal and the R signal are amplified by the set gain G2 (> set gain G1) in the high frequency range. That is, high frequency amplification processing is performed on the L signal and the R signal.
- the sound amplification mode of the sound signal is switched.
- the earphone 20 for the hearing impaired and the earphone 10 for the general public are separately prepared.
- an earphone 20 for the hard of hearing and an adapter 200 connected to the earphone 20 for the hard of hearing are prepared.
- the adapter 200 enables the hearing-impaired earphone 20 to be used as the general-purpose earphone 10.
- a change from the configuration of the first embodiment that occurs with this change will be described.
- symbol is attached
- the adapter 200 will be described with reference to FIG.
- the adapter 200 includes a plug part 210 to be inserted into the jack 90 and a connection part 220 into which the connection plug 23 of the hearing aid earphone 20 is inserted.
- the plug unit 210 includes a third common terminal 210A and a third input terminal 210B.
- the third common terminal 210 ⁇ / b> A is provided at the base of the plug part 210.
- the third input terminal 210 ⁇ / b> B is provided at the tip of the plug part 210.
- the external structure of the plug part 210 is the same as that of the connection plug 13 of the general-purpose earphone 10 of the first embodiment. That is, the outer dimensions of the third common terminal 210A and the third input terminal 210B are the same as the outer dimensions of the first common terminal 13A and the first input terminal 13B.
- the internal structure of the plug unit 210 is configured as follows.
- the third input terminal 210B is provided with a conductor 211 along the central axis of the plug part 210.
- the interior of the third common terminal 210A is hollow, and the conductor 211 is inserted through this hollow portion.
- the conductor 211 and the third common terminal 210A are insulated.
- the tip of the conductor 211 is in contact with the tip of the second input terminal 23 ⁇ / b> B of the connection plug 23 inserted into the adapter 200.
- connection part 220 is an extension part of the third common terminal 210A.
- the connection part 220 is formed in a cylinder.
- An inner electrode 221 that contacts the second common terminal 23 ⁇ / b> A and the dummy terminal 23 ⁇ / b> C of the connection plug 23 inserted into the adapter 200 is formed on the inner periphery of the connection part 220.
- connection plug 23 of the earphone 20 for the hearing impaired person is inserted into the adapter 200.
- the conductor 211 of the third input terminal 210B contacts the second input terminal 23B of the connection plug 23 of the earphone 20 for the hearing impaired. For this reason, the third input terminal 210 ⁇ / b> B is connected to one terminal of the speaker 22.
- the internal electrode 221 of the third common terminal 210A is in contact with the dummy terminal 23C and the second common terminal 23A of the connection plug 23 of the earphone 20 for the hearing impaired. For this reason, the third common terminal 210 ⁇ / b> A is connected to the other terminal of the speaker 22.
- the earphone 20 for the hearing impaired person to which the adapter 200 is attached constitutes the earphone 10 for the general public.
- preparing the earphone 20 for the deaf person and the adapter 200 is substantially the same as preparing the earphone 20 for the deaf person and the earphone 10 for the general person. Therefore, the earphone 20 for the hearing impaired person and the adapter 200 also have the same effect as in the first embodiment.
- the dummy plugs 23C and 123D are not provided in the connection plugs 13 and 113 of the general-purpose earphone 10, and the dummy plugs are connected to the connection plugs 23 and 123 of the deaf earphone 20. 23C and 123D are provided. Then, by detecting the presence or absence of the dummy terminals 23C and 123D, the type of the plug inserted into the jack 90 is determined, and the audio amplification mode of the audio signal is switched corresponding to the type of the plug.
- the general person and the deaf person can switch the sound amplification mode of the sound signal by selecting the general person earphone 10 and the deaf person earphone 20. That is, the user can reproduce the audio signal in an audio amplification mode corresponding to the selected earphone by connecting the earphone to the portable audio reproducing device 1 without performing an operation such as setting change in the device main body 2. Can do.
- the amplification factor of the audio signal in the high frequency range is set larger than when the dummy terminals 23C and 123D are not detected. That is, when the hearing impaired earphone 20 is connected to the jack 90, the amplification factor of the audio signal is set large in the high frequency range.
- a person who has selected the earphone 20 for the deaf person can listen to the sound with the increased sound pressure level in the high range by inserting the earphone 20 for the deaf person into the jack 90.
- visual recognition tags 14 and 24 are provided on the earphone 10 for the general public and the earphone 20 for the hearing impaired. That is, the general-purpose earphone 10 and the hearing-impaired earphone 20 have different appearances. For this reason, the administrator of the portable audio reproduction device 1 can easily determine which earphone the user uses, ie, the earphone 10 for the general public or the earphone 20 for the deaf person. Further, the administrator of the portable audio playback device 1 can appropriately advise the user of the portable audio playback device 1 as to whether or not the earphone suitable for the user is being used.
- Embodiments of the present invention are not limited to the embodiments illustrated in the above embodiments, and can be modified as follows, for example. The following modifications are not applied only to the above-described embodiments, and different modifications may be combined with each other.
- the visual tags 14 and 24 are attached to both the general-purpose earphone 10 and the hard-of-hearing earphone 20, but the visual tags 14 and 24 may be attached to only one of them. Also with this configuration, it is possible to easily grasp from the outside whether the user is using the general-purpose earphone 10 or the hearing-impaired earphone 20.
- a seal that can distinguish the earphone 10 for the general public and the earphone 20 for the hearing impaired by the appearance may be attached.
- the general-purpose earphone 10 and the hard-of-hearing earphone 20 can be distinguished from each other by appearance, so that the effect according to the above (3) is achieved.
- the sound pressure level is increased in the high frequency range of the sound signal, but the sound amplification mode of the sound signal is not limited to this. That is, the sound amplification process when the earphone 20 for the hard of hearing is inserted into the jack 90 may be a process that converts the sound into a sound that is easy for the hard of hearing.
- the compression process of the dynamic range of the audio signal may be performed.
- a conversion process for reducing an audio component whose sound pressure level is higher than the first set value is performed, and a conversion process for increasing an audio component whose sound pressure level is lower than the second set value. Is done.
- the sound pressure level is too high and the annoying sound is reduced, and the sound pressure level is low and the sound that is difficult to hear is increased.
- the audio signal is converted into a sound that is easy to hear for the hard of hearing.
- the earphone 20 for the hard of hearing into the jack 90, it is possible to listen to the sound whose width of the sound pressure level (the difference between the maximum value and the minimum value of the sound pressure level) is narrowed. it can.
- an earphone with a two-terminal plug structure is used as the general-purpose earphone 10 and an earphone with a three-terminal plug structure is used as the earphone 20 for the deaf, but the terminal plug structure is reversed. It may be. That is, an earphone with a two-terminal plug structure may be used as the earphone 20 for the hearing impaired, and an earphone with a three-terminal plug structure may be used as the general-purpose earphone 10.
- audio amplification processing such as high frequency amplification processing or dynamic range compression processing is performed on the audio signal.
- a receiver that receives a signal transmitted from a transmitter is given as an example of the portable audio playback device 1, but the present invention is not limited to this application.
- the present invention can be applied to any audio reproduction device that reproduces an audio signal using an earphone.
- the present invention can be applied to a portable audio device, a cellular phone, and a portable computer.
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Abstract
Description
携帯型音声再生装置の一例を説明する。 (First embodiment)
An example of a portable audio playback device will be described.
図5および図6を参照して、第1実施形態の変形例について説明する。 (Second Embodiment)
A modification of the first embodiment will be described with reference to FIGS.
図7および図8を参照して、第1実施形態のイヤフォンの変形例を説明する。 (Third embodiment)
With reference to FIG. 7 and FIG. 8, the modification of the earphone of 1st Embodiment is demonstrated.
本発明の実施態様は上記各実施形態に例示した態様に限られるものではなく、例えば以下のように変更することもできる。また以下の各変形例は、上記各実施形態についてのみ適用されるものではなく、異なる変形例同士を互いに組み合わせて実施してもよい。 (Other embodiments)
Embodiments of the present invention are not limited to the embodiments illustrated in the above embodiments, and can be modified as follows, for example. The following modifications are not applied only to the above-described embodiments, and different modifications may be combined with each other.
Claims (7)
- イヤフォンで音声信号を再生する携帯型音声再生装置において、
装置本体と、第1イヤフォンと、第2イヤフォンとを備え、
前記装置本体は、前記音声信号を再生する音声再生回路と、前記第1イヤフォンの第1接続プラグと前記第2イヤフォンの第2接続プラグとの両プラグに接続可能なジャックとを有し、
前記第1イヤフォンの前記第1接続プラグは、第1共通端子と第1入力端子とを備え、
前記第2イヤフォンの前記第2接続プラグは、第2共通端子と、第2入力端子と、前記第2共通端子および前記第2入力端子から絶縁されたダミー端子とを備え、
前記音声再生回路は、前記第1接続プラグまたは前記第2接続プラグが前記ジャックに差し込まれているとき、前記ダミー端子の有無の検出に基づいて前記音声信号の音声増幅態様を切り換える
ことを特徴とする携帯型音声再生装置。 In a portable audio reproduction device that reproduces an audio signal with an earphone,
An apparatus main body, a first earphone, and a second earphone;
The apparatus main body includes an audio reproduction circuit that reproduces the audio signal, and a jack that can be connected to both the first connection plug of the first earphone and the second connection plug of the second earphone,
The first connection plug of the first earphone includes a first common terminal and a first input terminal,
The second connection plug of the second earphone includes a second common terminal, a second input terminal, and a dummy terminal insulated from the second common terminal and the second input terminal,
The audio reproduction circuit switches an audio amplification mode of the audio signal based on detection of the presence or absence of the dummy terminal when the first connection plug or the second connection plug is inserted into the jack. Portable audio player. - 請求項1に記載の携帯型音声再生装置において、
前記音声再生回路は、前記ダミー端子が検出されているときは、前記ダミー端子が検出されていないときよりも、高周波数域の前記音声信号の増幅率を大きくする
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to claim 1,
The audio reproduction circuit increases the amplification factor of the audio signal in a high frequency region when the dummy terminal is detected than when the dummy terminal is not detected. Playback device. - 請求項1に記載の携帯型音声再生装置において、
前記音声再生回路は、前記ダミー端子が検出されていないときは、前記ダミー端子が検出されているときよりも、高周波数域の前記音声信号の増幅率を大きくする
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to claim 1,
The audio reproduction circuit increases the amplification factor of the audio signal in a high frequency region when the dummy terminal is not detected than when the dummy terminal is detected. Playback device. - 請求項1に記載の携帯型音声再生装置において、
前記音声再生回路は、前記ダミー端子が検出されているときは、前記ダミー端子が検出されていないときよりも、前記音声信号のダイナミックレンジを圧縮する
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to claim 1,
The portable audio reproduction device, wherein the audio reproduction circuit compresses the dynamic range of the audio signal when the dummy terminal is detected than when the dummy terminal is not detected. - 請求項1に記載の携帯型音声再生装置において、
前記音声再生回路は、前記ダミー端子が検出されていないときは、前記ダミー端子が検出されているときよりも、前記音声信号のダイナミックレンジを圧縮する
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to claim 1,
The portable audio reproduction device, wherein the audio reproduction circuit compresses the dynamic range of the audio signal when the dummy terminal is not detected than when the dummy terminal is detected. - 請求項1~5のいずれか一項に記載の携帯型音声再生装置において、
前記第1イヤフォンおよび前記第2イヤフォンは外観で互いに異なる形態を有する
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to any one of claims 1 to 5,
The first earphone and the second earphone have appearances different from each other in appearance. - 請求項1~5のいずれか一項に記載の携帯型音声再生装置において、
前記第2接続プラグに接続可能であり、かつ前記第1接続プラグと同じ端子構造を有するアダプタを更に備え、前記アダプタが前記第2接続プラグに接続されることにより、前記第2イヤフォンが前記第1イヤフォンとして機能する
ことを特徴とする携帯型音声再生装置。 The portable audio playback device according to any one of claims 1 to 5,
The adapter further includes an adapter that can be connected to the second connection plug and has the same terminal structure as the first connection plug, and the adapter is connected to the second connection plug, whereby the second earphone is connected to the second connection plug. A portable audio playback device that functions as one earphone.
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