JP2005287600A - Sound information transmitter - Google Patents

Sound information transmitter Download PDF

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JP2005287600A
JP2005287600A JP2004103586A JP2004103586A JP2005287600A JP 2005287600 A JP2005287600 A JP 2005287600A JP 2004103586 A JP2004103586 A JP 2004103586A JP 2004103586 A JP2004103586 A JP 2004103586A JP 2005287600 A JP2005287600 A JP 2005287600A
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signal
consonant
amplitude
clarification
audio
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JP4012970B2 (en
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Seiji Nakagawa
誠司 中川
Yoichi Fujisaka
洋一 藤坂
Yosuke Okamoto
洋輔 岡本
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National Institute of Advanced Industrial Science and Technology AIST
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Priority to US11/091,480 priority patent/US7457741B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound information transmitter providing superior identification property of sound information. <P>SOLUTION: This sound information transmitter 1 transmitting the sound information to a human body is provided with a microphone 2 for inputting sound from the outside, a sound signal processing part 20 generating a consonant clarification signal based on the input sound signal, a carrier wave signal generation part 6 generating a carrier wave signal, an amplitude modulation part 8 modulating an amplitude of the carrier signal based on the consonant clarification signal, and a vibrator 12 transmitting a mechanical vibration based on the output signal having the modulated amplitude. The sound signal processing part 20 is provided with a consonant extraction part 26 extracting the consonant part included in the sound signal and a repetition processing part 24 adding the extracted consonant part to the sound signal and generating the consonant clarification signal formed by repeating the consonant part in the sound signal a plurality of times. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、音声情報を人体に伝達する音声情報伝達装置に関する。   The present invention relates to a voice information transmission device that transmits voice information to a human body.

この種の音声情報伝達装置として、難聴者用の補聴器が知られている。補聴器には、音の振動が鼓膜を介して脳の聴覚器官に伝達される気導型の補聴器と、音の振動が鼓膜を介さずに頭蓋骨などから直接人体に伝わる骨導型の補聴器とがあり、イヤホン又は振動子を人体の所定部位に取り付けて使用する。最近では、振動子を介して超音波振動を脳の聴覚器官に伝達することにより、音声情報の伝達を可能にした構成も知られている。例えば、特許文献１には、音声信号をＤＳＢ（両側波帯）変調により振幅変調し、超音波振動子を介して人体に伝達する構成が開示されている。
特開２００１−３２０７９９号公報 A hearing aid for the hearing impaired is known as this type of audio information transmission device. Hearing aids include air-conducting hearing aids in which sound vibration is transmitted to the auditory organ of the brain through the eardrum, and bone-conducting hearing aids in which sound vibration is transmitted directly from the skull to the human body without going through the eardrum. Yes, the earphone or vibrator is attached to a predetermined part of the human body. Recently, a configuration that enables transmission of audio information by transmitting ultrasonic vibration to an auditory organ of the brain via a vibrator is also known. For example, Patent Document 1 discloses a configuration in which an audio signal is amplitude-modulated by DSB (double sideband) modulation and transmitted to a human body via an ultrasonic transducer.
JP 2001-320799 A

ところが、上述のような超音波振動方式の音声情報伝達装置は、入力された音声情報の子音部が使用者に伝達されにくく、この点において更に改良の余地があった。   However, the ultrasonic vibration type audio information transmission apparatus as described above has a room for further improvement in this respect because it is difficult for the consonant part of the input audio information to be transmitted to the user.

本発明は、このような問題を解決すべくなされたものであって、音声情報の良好な識別性を得ることができる音声情報伝達装置の提供を目的とする。   The present invention has been made to solve such a problem, and an object of the present invention is to provide a voice information transmission device that can obtain good discrimination of voice information.

本発明の前記目的は、音声情報を人体に伝達する音声情報伝達装置であって、外部から音声が入力されるマイクロフォンと、入力された音声信号に基づいて子音明瞭化信号を生成する音声信号処理部と、搬送波信号を生成する搬送波信号発生部と、前記搬送波信号を前記子音明瞭化信号により振幅変調する振幅変調部と、振幅変調された出力信号に基づく機械的振動を伝達する振動子とを備え、前記音声信号処理部は、前記音声信号に含まれる子音部を抽出する子音抽出部と、抽出された子音部を前記音声信号に付加することにより、前記音声信号における子音部が複数回反復された前記子音明瞭化信号を生成する反復処理部とを備える音声情報伝達装置により達成される。   The object of the present invention is an audio information transmitting apparatus for transmitting audio information to a human body, and a microphone for receiving audio from outside and an audio signal processing for generating a consonant clarification signal based on the input audio signal A carrier signal generation unit that generates a carrier signal, an amplitude modulation unit that modulates the amplitude of the carrier signal with the consonant clarification signal, and a vibrator that transmits mechanical vibrations based on the amplitude-modulated output signal. The audio signal processing unit extracts a consonant part included in the audio signal, and adds the extracted consonant part to the audio signal so that the consonant part in the audio signal is repeated a plurality of times. And an iterative processing unit for generating the consonant clarification signal.

この音声情報伝達装置において、前記子音抽出部における子音部の抽出は、前記音声信号の振幅が所定値以下となる区間を検出することに基づいて行うことができる。   In this speech information transmission device, the consonant extraction in the consonant extraction unit can be performed based on detecting a section in which the amplitude of the speech signal is a predetermined value or less.

また、前記音声信号処理部は、抽出された子音部の振幅を増幅する振幅増幅部を更に備えることが好ましく、前記反復処理部は、増幅された子音部が複数回反復された前記子音明瞭化信号を生成することが好ましい。   The audio signal processing unit preferably further includes an amplitude amplifying unit that amplifies the amplitude of the extracted consonant part, and the iterative processing unit includes the consonant clarification in which the amplified consonant part is repeated a plurality of times. Preferably, a signal is generated.

これらの音声情報伝達装置において、前記搬送波信号は、周波数が２０〜１００ｋＨｚであることが好ましい。   In these audio information transmission apparatuses, the carrier signal preferably has a frequency of 20 to 100 kHz.

本発明の音声情報伝達装置によれば、音声情報の良好な識別性を得ることができる。   According to the voice information transmitting apparatus of the present invention, it is possible to obtain good discrimination of voice information.

以下、本発明の実態形態について添付図面を参照して説明する。図１は、本発明の一実施形態に係る音声情報伝達装置の構成を示すブロック図である。図１に示すように、この
音声情報伝達装置１は、外部から音声が入力されるマイクロフォン２と、入力された音声信号を増幅する音声増幅部４と、音声信号に基づいて子音明瞭化信号を生成する音声信号処理部２０と、搬送波信号を生成する搬送波信号発生部６と、搬送波信号を子音明瞭化信号により振幅変調する振幅変調部８と、振幅変調部８からの出力信号を増幅する出力増幅部１０と、増幅された出力信号に基づく機械的振動を伝達する振動子１２とを備えている。 Hereinafter, actual forms of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a voice information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 1, this audio information transmitting apparatus 1 includes a microphone 2 to which audio is input from the outside, an audio amplifying unit 4 that amplifies the input audio signal, and a consonant clarification signal based on the audio signal. An audio signal processing unit 20 to generate, a carrier signal generation unit 6 to generate a carrier wave signal, an amplitude modulation unit 8 that amplitude-modulates the carrier signal with a consonant clarification signal, and an output that amplifies the output signal from the amplitude modulation unit 8 An amplifying unit 10 and a vibrator 12 that transmits mechanical vibration based on the amplified output signal are provided.

音声信号処理部２０は、入力された音声信号を所定時間（例えば、数十〜数百ｍｓ）遅延させる遅延処理を行う遅延処理部２２を備えている。遅延された音声信号は、反復処理部２４に入力される。   The audio signal processing unit 20 includes a delay processing unit 22 that performs a delay process for delaying an input audio signal for a predetermined time (for example, several tens to several hundreds ms). The delayed audio signal is input to the iterative processing unit 24.

また、音声信号処理部２０に入力された音声信号は、子音抽出部２６にも入力され、子音抽出部２６において音声信号から子音部が抽出される。子音部の抽出方法は特に限定されるものではなく、例えば、音声信号の単位時間内のゼロクロス数を検出し、このゼロクロス数が所定数を越えた領域を子音部と判定することができるが、本実施形態においては、後述するように、音声信号の振幅が所定値以下の区間を検出することにより、子音部を抽出している。子音抽出部２６で抽出された子音部は、振幅増幅部２８において振幅増幅された後、反復処理部２４に入力される。   The audio signal input to the audio signal processing unit 20 is also input to the consonant extraction unit 26, and the consonant extraction unit 26 extracts the consonant part from the audio signal. The method for extracting the consonant part is not particularly limited.For example, the number of zero crosses within a unit time of the audio signal can be detected, and an area where the number of zero crosses exceeds a predetermined number can be determined as a consonant part. In this embodiment, as will be described later, the consonant part is extracted by detecting a section in which the amplitude of the audio signal is equal to or smaller than a predetermined value. The consonant part extracted by the consonant extraction unit 26 is amplified by the amplitude amplification unit 28 and then input to the iterative processing unit 24.

反復処理部２４は、抽出された子音部を遅延処理部２２からの音声信号に付加し、音声信号における子音部が複数回反復された子音明瞭化信号を生成する。   The iterative processing unit 24 adds the extracted consonant part to the audio signal from the delay processing unit 22, and generates a consonant clarification signal in which the consonant part in the audio signal is repeated a plurality of times.

搬送波信号発生部６は、所望の搬送波信号を生成し、可変抵抗などを備えることにより、搬送波信号の周波数を振動子１２の共振周波数近傍で調節可能に構成されている。振幅変調部８は、入力された搬送波信号を子音明瞭化信号により振幅変調して出力する。   The carrier signal generator 6 is configured to generate a desired carrier signal and include a variable resistor or the like so that the frequency of the carrier signal can be adjusted in the vicinity of the resonance frequency of the vibrator 12. The amplitude modulation unit 8 modulates the amplitude of the input carrier signal with a consonant clarification signal and outputs the result.

振動子１２は、例えば、図２に示すように、弾性変形可能なヘアバンド型の取付部材１４の両端にそれぞれ設けることができ、取付部材１４を頭部に装着することで、２つの振動子１２，１２を人体表面の所定部位に当接させた状態で固定することができる。   For example, as shown in FIG. 2, the vibrator 12 can be provided at both ends of an elastically deformable hairband attachment member 14. By attaching the attachment member 14 to the head, two vibrators can be provided. 12 and 12 can be fixed in contact with a predetermined part of the human body surface.

次に、本実施形態の音声情報伝達装置の作動について説明する。音声情報伝達装置のスイッチをＯＮにした状態で外部から音声がマイクロフォン２に入力されると、この音声信号が音声増幅部４において所定のレベルまで増幅された後、音声信号処理部２０に向けて出力される。   Next, the operation of the audio information transmission apparatus of this embodiment will be described. When sound is input from the outside to the microphone 2 with the switch of the sound information transmission device turned on, the sound signal is amplified to a predetermined level by the sound amplifier 4 and then directed to the sound signal processor 20. Is output.

音声信号処理部２０においては、音声信号から子音部の抽出処理が行われる。
音声信号における子音部は、図３に示すように、母音部との間にＶＯＴ（Voice Onset Time）が数十ｍｓ程度存在する。ＶＯＴは、子音の破裂から声帯が振動するまでの時間であるため、無音に近い状態である。したがって、子音部の立ち上がりや母音に比べて振幅は小さくなっているので、適当な基準値を設定し、振幅がこの基準値以下となる状態が所定時間（例えば、１０ｍｓ程度）以上続く領域をＶＯＴとして判別することにより、子音部の残余の部分や母音部と区別して、子音部の終期を特定することができる。 In the audio signal processing unit 20, a consonant part extraction process is performed from the audio signal.
As shown in FIG. 3, the consonant part in the audio signal has a VOT (Voice Onset Time) of about several tens of ms between the vowel part. Since VOT is the time from the burst of a consonant until the vocal cords vibrate, it is almost silent. Therefore, since the amplitude is smaller than the rise of the consonant part and the vowel, an appropriate reference value is set, and a region where the amplitude is below this reference value continues for a predetermined time (for example, about 10 ms) or more is VOT. As a result, it is possible to identify the end of the consonant part by distinguishing it from the remaining part of the consonant part and the vowel part.

一方、母音部の後、次に続く子音部との間にも、通常は数十ｍｓ以上の無音区間が存在する。したがって、上述したＶＯＴの検出と同様にしてこの無音区間を判別することにより、次の子音部の始期を特定することができる。   On the other hand, there is usually a silent section of several tens of ms or more between the vowel part and the subsequent consonant part. Therefore, the beginning of the next consonant part can be specified by discriminating this silent section in the same manner as the VOT detection described above.

母音部の振幅は子音部の振幅よりも大きいことから、振幅が所定値以下の区間がＶＯＴであるか母音後の無音区間であるかは、その区間の前後における振幅の大きさに基づいて判別することができる。したがって、ＶＯＴについては子音部に含める一方、母音後の無
音区間については子音部に含めないようにすることで、子音部の時間波形のみを抽出することができる。 Since the amplitude of the vowel part is larger than the amplitude of the consonant part, it is determined whether the section where the amplitude is equal to or less than the predetermined value is a VOT or a silent section after the vowel based on the magnitude of the amplitude before and after the section. can do. Therefore, only the time waveform of the consonant part can be extracted by including the VOT in the consonant part while not including the silent section after the vowel in the consonant part.

子音抽出部２６における子音部の抽出は、上述したように子音部全体を抽出するようにしてもよいが、ＶＯＴのみを抽出するようにしてもよく、或いは、ＶＯＴ以外の残余の部分のみを抽出するようにしてもよい。本実施形態においては、子音部からＶＯＴを除いた部分を、抽出された子音部としている。   The consonant extraction in the consonant extraction unit 26 may be performed by extracting the entire consonant part as described above, but may extract only the VOT or only the remaining part other than the VOT. You may make it do. In the present embodiment, the part obtained by removing VOT from the consonant part is the extracted consonant part.

子音抽出部２６で抽出された子音部は、振幅増幅部２８を経て反復処理部２４に入力される。振幅増幅部２８における振幅増幅は、必ずしも必要ではなく、子音抽出部２６で抽出された子音部が、振幅増幅部２８を通過せずに直接反復処理部２４へ入力されるように構成してもよい。また、子音部の振幅が大きく増幅され過ぎると、もとの音声が知覚されなくなるため好ましくない。したがって、振幅増幅部２８の入力信号の振幅に対する出力信号の振幅の比は、１．０〜５．０の範囲が好ましい。   The consonant part extracted by the consonant extraction unit 26 is input to the iterative processing unit 24 via the amplitude amplification unit 28. Amplitude amplification in the amplitude amplifying unit 28 is not necessarily required, and the consonant part extracted by the consonant extracting unit 26 may be directly input to the iterative processing unit 24 without passing through the amplitude amplifying unit 28. Good. Further, if the amplitude of the consonant part is excessively amplified, the original sound is not perceived, which is not preferable. Therefore, the ratio of the amplitude of the output signal to the amplitude of the input signal of the amplitude amplifier 28 is preferably in the range of 1.0 to 5.0.

反復処理部２４は、子音抽出部２６で抽出された子音部の時間波形に基づいて、遅延処理部２２から遅れて入力される音声信号に含まれる同一の波形部分を検出する。そして、同一の波形部分を検出すると、増幅された子音部の時間波形を、子音部が複数回繰り返されるように音声信号の途中に挿入する。この結果、反復処理部２４から出力される信号は、図４に示すように、子音部が繰り返されて強調された子音明瞭化信号となる。   Based on the time waveform of the consonant part extracted by the consonant extraction unit 26, the iterative processing unit 24 detects the same waveform portion included in the audio signal input with a delay from the delay processing unit 22. When the same waveform portion is detected, the amplified time waveform of the consonant part is inserted in the middle of the audio signal so that the consonant part is repeated a plurality of times. As a result, as shown in FIG. 4, the signal output from the iterative processing unit 24 becomes a consonant clarification signal in which the consonant part is repeated and emphasized.

子音明瞭化信号における子音部の繰り返し回数は、音声信号に最初から含まれる子音部も含めて複数回であれば特に限定されないが、回数が多すぎると使用者が違和感を覚えやすくなることから、２〜５回程度であることが好ましい。   The number of repetitions of the consonant part in the consonant clarification signal is not particularly limited as long as it is a plurality of times including the consonant part included in the sound signal from the beginning, but if the number is too large, it is easy for the user to feel uncomfortable. It is preferably about 2 to 5 times.

このように、音声信号に子音部を付加することにより、付加された子音部の分だけ子音に相当する区間が延長される。この延長された時間は、母音後の無音時間から削除することにより、次の子音又は母音までの時間を一定にすることが好ましい。   Thus, by adding the consonant part to the audio signal, the section corresponding to the consonant is extended by the added consonant part. It is preferable that the time until the next consonant or vowel is made constant by deleting the extended time from the silent time after the vowel.

一方、搬送波信号発生部６においては、正弦波からなる搬送波信号が生成される。本実施形態のように、振動子１２を人体に当接させる構成の場合には、搬送波信号の周波数は、人間の皮膚、筋肉または骨を介して脳の聴覚機能に振動が良好に伝達されるように、２０〜１００ｋＨｚであることが好ましく、２０〜５０ｋＨｚであることがより好ましい。搬送波信号は、振幅変調部８に向けて出力される。   On the other hand, the carrier wave signal generation unit 6 generates a carrier wave signal composed of a sine wave. In the case of the configuration in which the vibrator 12 is brought into contact with the human body as in the present embodiment, the frequency of the carrier wave signal is well transmitted to the auditory function of the brain via the human skin, muscle or bone. Thus, it is preferable that it is 20-100 kHz, and it is more preferable that it is 20-50 kHz. The carrier signal is output toward the amplitude modulation unit 8.

振幅変調部８は、搬送波信号発生部６からの搬送波信号を、音声信号処理部２０で生成された子音明瞭化信号により振幅変調する。振幅変調の方法は特に限定されるものではなく、例えば、両側波体（ＤＳＢ）変調などを挙げることができる。こうして変調された出力信号は、出力増幅部１０において増幅され、入力された音声に対応する機械的振動が振動子１２を介して人体に伝達される。   The amplitude modulation unit 8 modulates the amplitude of the carrier wave signal from the carrier wave signal generation unit 6 using the consonant clarification signal generated by the audio signal processing unit 20. The method of amplitude modulation is not particularly limited, and examples thereof include double wave body (DSB) modulation. The output signal thus modulated is amplified by the output amplification unit 10, and mechanical vibration corresponding to the input sound is transmitted to the human body via the vibrator 12.

このように、本実施形態の音声情報伝達装置によれば、従来のように入力された音声信号により搬送波信号を振幅変調するのではなく、音声信号に基づき音声信号処理部において子音明瞭化信号を生成し、この子音明瞭化信号により搬送波信号を振幅変調するようにしているので、子音が特に強調された情報を振動子１２から出力することができる。したがって、従来は不明瞭になり易かった子音の識別力を向上させることができる。特に、搬送波信号の周波数が２０〜１００ｋＨｚの場合には、音声ではなく超音波振動として人体に伝達されるため、子音の識別性を高める効果がより顕著なものとなる。   As described above, according to the audio information transmitting apparatus of this embodiment, the carrier signal is not amplitude-modulated by the input audio signal as in the prior art, but the consonant clarification signal is generated in the audio signal processing unit based on the audio signal. Since the carrier wave signal is amplitude-modulated by the generated consonant clarification signal, information in which the consonant is particularly emphasized can be output from the vibrator 12. Therefore, it is possible to improve the discriminating power of the consonant that has been easily obscured in the past. In particular, when the frequency of the carrier wave signal is 20 to 100 kHz, since it is transmitted to the human body as an ultrasonic vibration rather than a voice, the effect of enhancing the consonant discrimination becomes more remarkable.

本発明に係る音声情報伝達装置の効果を確認するため、実際に語音同定テストを行った
。 In order to confirm the effect of the speech information transmission apparatus according to the present invention, a speech sound identification test was actually performed.

子音明瞭化信号における子音部の繰り返し回数は、図４に示すように、もとの音声信号に含まれる子音部も含めて３回とし、搬送波信号の周波数は、３０ｋＨｚとした。このような条件下で、被験者２０名に対し、「イチ」や「サン」などの一桁数字の認識率を調べた。また、比較例として、子音明瞭化処理を行わずに搬送波信号を音声信号により振幅変調した場合について、上記実施例と同様の試験を行った。この結果を図５に示す。   As shown in FIG. 4, the number of repetitions of the consonant part in the consonant clarification signal is 3 times including the consonant part included in the original audio signal, and the frequency of the carrier wave signal is 30 kHz. Under these conditions, the recognition rate of single-digit numbers such as “1” and “Sun” was examined for 20 subjects. Further, as a comparative example, the same test as in the above example was performed in the case where the carrier wave signal was amplitude-modulated by the audio signal without performing the consonant clarification process. The result is shown in FIG.

図５から明らかなように、大部分の被験者は、比較例よりも実施例の方が正答率が高くなっており、本発明により音声情報の識別性が向上していることを確認した。   As is clear from FIG. 5, most subjects confirmed that the correct answer rate was higher in the example than in the comparative example, and the discrimination of voice information was improved by the present invention.

本発明の一実施形態に係る音声情報伝達装置の構成を示すブロック図である。It is a block diagram which shows the structure of the audio | voice information transmission apparatus which concerns on one Embodiment of this invention. 上記音声情報伝達装置における振動子の取り付け状態の一例を示す斜視図である。It is a perspective view which shows an example of the attachment state of the vibrator | oscillator in the said audio | voice information transmission apparatus. 音声信号の波形の一例を示す図である。It is a figure which shows an example of the waveform of an audio | voice signal. 子音明瞭化信号の波形の一例を示す図である。It is a figure which shows an example of the waveform of a consonant clarification signal. 実施例および比較例の実験結果を示す図である。It is a figure which shows the experimental result of an Example and a comparative example.

符号の説明Explanation of symbols

１ 音声情報伝達装置
２ マイクロフォン
４ 音声増幅部
６ 搬送波信号発生部
８ 振幅変調部
１０ 出力増幅部
１２ 振動子
２０ 音声信号処理部
２２ 遅延処理部
２４ 反復処理部
２６ 子音抽出部
２８ 振幅増幅部 DESCRIPTION OF SYMBOLS 1 Audio | voice information transmission apparatus 2 Microphone 4 Audio | voice amplification part 6 Carrier wave signal generation part 8 Amplitude modulation part 10 Output amplification part 12 Transducer 20 Audio | voice signal processing part 22 Delay processing part 24 Iterative processing part 26 Consonant extraction part 28 Amplitude amplification part

Claims (4)

音声情報を人体に伝達する音声情報伝達装置であって、
外部から音声が入力されるマイクロフォンと、
入力された音声信号に基づいて子音明瞭化信号を生成する音声信号処理部と、
搬送波信号を生成する搬送波信号発生部と、
前記搬送波信号を前記子音明瞭化信号に基づいて振幅変調する振幅変調部と、
振幅変調された出力信号に基づく機械的振動を伝達する振動子とを備え、
前記音声信号処理部は、前記音声信号に含まれる子音部を抽出する子音抽出部と、
抽出された子音部を前記音声信号に付加することにより、前記音声信号における子音部が複数回反復された前記子音明瞭化信号を生成する反復処理部とを備える音声情報伝達装置。 A voice information transmission device that transmits voice information to a human body,
A microphone that receives sound from outside,
An audio signal processing unit that generates a consonant clarification signal based on the input audio signal;
A carrier signal generator for generating a carrier signal;
An amplitude modulator that modulates the amplitude of the carrier signal based on the consonant clarification signal;
A vibrator that transmits mechanical vibration based on an amplitude-modulated output signal,
The voice signal processing unit is configured to extract a consonant part included in the voice signal;
An audio information transmission apparatus comprising: an iterative processing unit that generates the consonant clarification signal in which the consonant part in the audio signal is repeated a plurality of times by adding the extracted consonant part to the audio signal. 前記子音抽出部における子音部の抽出は、前記音声信号の振幅が所定値以下となる区間を検出することに基づいて行われる請求項１に記載の音声情報伝達装置。 The speech information transmission apparatus according to claim 1, wherein the consonant part extraction in the consonant extraction unit is performed based on detecting a section in which an amplitude of the speech signal is a predetermined value or less. 前記音声信号処理部は、抽出された子音部の振幅を増幅する振幅増幅部を更に備え、
前記反復処理部は、増幅された子音部が複数回反復された前記子音明瞭化信号を生成する請求項１又は２に記載の音声情報伝達装置。 The audio signal processing unit further includes an amplitude amplifying unit that amplifies the amplitude of the extracted consonant part,
The speech information transmitting apparatus according to claim 1, wherein the iterative processing unit generates the consonant clarification signal in which the amplified consonant part is repeated a plurality of times. 前記搬送波信号は、周波数が２０〜１００ｋＨｚである請求項１から３のいずれかに記載の音声情報伝達装置。 The audio information transmission apparatus according to claim 1, wherein the carrier wave signal has a frequency of 20 to 100 kHz.
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US11/091,480 US7457741B2 (en) 2004-03-30 2005-03-29 Device for transmitting speech information
DE102005014511A DE102005014511A1 (en) 2004-03-30 2005-03-30 Device for transmitting voice information

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