公开(公告)号：JP2000092582A

公开(公告)日：2000-03-31

申请号：JP26046498

申请日：1998-09-14

Applicant: SONY CORP

Inventor： MIURA MASAMI

IPC: H04R1/10

Abstract: PROBLEM TO BE SOLVED: To improve sound shield from external environments and to make it possible to listen a reproduced sound radiated from an electric-acoustic transducer element with fine reproducing characteristics. SOLUTION: The earphone is provided with a speaker unit 12 having a sound radiation hole 19 for radiating a reproduced sound, a speaker storing part 16 for storing the unit 12 so that the hole 19 is arranged on the inlet 4 of an external auditory, a sound absorbing tube 17 for absorbing a sound reflected by a tympanic membrane 5, an aperture part 14 formed on an insertion end opposed to the external auditory cancel 4, and an acoustic tube 13 closing the other end opposed to the aperture part 14. At the time of fitting the acoustic tube 13 to an article 1, the tube 13 forms a closed space together with the external auditory 3.

公开(公告)号：JPH1117778A

公开(公告)日：1999-01-22

申请号：JP16563197

申请日：1997-06-23

Applicant: SONY CORP

Inventor： MIURA MASAMI

IPC: G10L11/00 ,  G10L19/02 ,  H04B14/00 ,  H04M1/00 ,  G10L7/04 ,  G10L9/04

Abstract: PROBLEM TO BE SOLVED: To improve the sharpness of audio signals in a hearing aid or the like. SOLUTION: Filters 12A-12C are provided for dividing the inputted audio signal into respective formant components. Nonlinear circuits 13A-13C are provided for respectively supplying the outputs of the filters 12A-12C. An adder circuit 15 is provided for resynthesizing the output signals of the nonlinear circuits 13A-13C into audio signal and outputting it. The nonlinear circuits 13A-13C have a level compression range and a level extension range in their input/output characteristics. The level compression range is set to the level range of the inputted audio signal and the level extension range is set to an input level range smaller than the level compression range. The nonlinear circuits 13A-13C perform the limitation of output levels within the input level range larger than the level compression range.

公开(公告)号：JPH10117400A

公开(公告)日：1998-05-06

申请号：JP28754996

申请日：1996-10-09

Applicant: SONY CORP

Inventor： MIURA MASAMI ,  YABE SUSUMU ,  IDEOKA YOSHIHIKO

IPC: H04R1/10 ,  H04R1/30 ,  H04R1/34 ,  H04R25/00 ,  H04R29/00

Abstract: PROBLEM TO BE SOLVED: To transmit the output sound of a hearing aid to the ear of a checker with fidelity and to secure the safety of the checker by correcting the frequency characteristic of sonic waves to be supplied to the external auditory canal of the checker through an equalizer means. SOLUTION: A sound collecting part 10 collects the output sounds from the earphone of the hearing aid, converts them to an audio signal, and outputs it. A signal processing circuit 20 processes the audio signal from the sound collecting part 10. This amplitude limited audio signal is supplied through a variable resistor 23 for volume adjustment to an equalizer circuit 24, and the equalizing-processed audio signal is supplied through an output amplifier 25 to an earphone part 30. The earphone part 30 converts the audio signal from the amplifier 25 into acoustics and supplies them to the ear of checker of the hearing aid by planar-wave propagation. Thus, the confirmation or check of operating state or adjusted state of the hearing aid or the confirmation of sound quality is performed exactly. Further, the sense for hearing of the checker is protected surely.

公开(公告)号：JPH06289897A

公开(公告)日：1994-10-18

申请号：JP7463693

申请日：1993-03-31

Applicant: SONY CORP

Inventor： MIURA MASAMI

IPC: G10L13/00 ,  G10L9/04

Abstract: PURPOSE:To emphasize a high frequency component required for linguistic recognition by a speech and enable excellent speech recognition by emphasizing and outputting a 1st and a 2nd formant component. CONSTITUTION:A speech signal containing a pitch frequency component extracted by a band-pass filter 11 is supplied to a speech processing circuit 30 and a speech signal containing the 1st formant component extracted by a band-pass filter 12 is supplied to a speech processing circuit 40; and a speech signal containing the 2nd formant component extracted by a band-pass filter 13 is supplied to a speech processing circuit 50 and a speech signal containing a consonant component extracted by a band-pass filter 14 is supplied to a speech processing circuit 60. Those circuits 30-60 emphasize principal components in corresponding bands and also attenuate noise components. Then they are added by an adder 7 after being passed through band-pass filters 21-24 to put the respective bands together and the resulting signal is supplied to a speech signal output terminal 8. Consequently, proper emphasis processing and nose removing processing is performed by components constituting the speech and a speech signal which enables the speech language to excellently be recognized is obtained.

公开(公告)号：JPH06140856A

公开(公告)日：1994-05-20

申请号：JP31122292

申请日：1992-10-26

Applicant: SONY CORP

Inventor： MIURA MASAMI

IPC: G10L15/20 ,  G10L21/02 ,  H03G11/00 ,  H04R25/00 ,  G10L3/02

Abstract: PURPOSE:To prevent the degree of clearness from being lowered by suppressing an amplitude for a prescribed time before a time point when the vowel block of a voice signal compressed in the amplitude level is finished. CONSTITUTION:A voice analysis part 2 detects the vowel block of the digital voice signal compressed with the amplitude level with a linear predictive analysis method or a PARCOR analysis method, detects the end of the vowel block and outputs an end detecting signal. On the other hand, the digital voice signal is stored in a voice memory 4 as it is. When a CPU 3 receives the end detecting signal from the analysis part 2, voice data in the memory 4 are read out, a control for decreasing the amplitude or turning it to '0' is performed for (t) milli-seconds before the end of the vowel block, and a voice control command signal is outputted to a D/A converter 5 later. This signal is converted to an analog signal by the converter 5 and outputted from a voice output signal 6 as a completely processed regenerative voice signal. Thus, the degree of voice clearness can be prevented from being lowered.

公开(公告)号：JPH05327623A

公开(公告)日：1993-12-10

申请号：JP15619192

申请日：1992-05-25

Applicant: SONY CORP

Inventor： MIURA MASAMI ,  FUNABASHI YOKO

IPC: G02B26/08 ,  H04B10/11 ,  H04B10/114 ,  H04B10/548 ,  H04R1/10 ,  H04B10/10 ,  H04B10/22

Abstract: PURPOSE:To provide a infrared ray transmission reception system in which no beat interference takes place. CONSTITUTION:In the system in which a voice signal is sent from a transmission unit (microphone 10) to a relay unit in terms of an infrared ray signal and the relay unit applies the infrared ray signal to the reception unit (headphone 40), a light interrupt means (33d) is provided to one or both of a light receiving means 21 and a light emitting means 33 in the relay unit or the directivity of them is controlled to prevent the input of an infrared ray output from the light emitting means 33 to the light receiving means 21.

公开(公告)号：JPH04175097A

公开(公告)日：1992-06-23

申请号：JP29177590

申请日：1990-10-31

Applicant: SONY CORP

Inventor： MIURA MASAMI

IPC: H04R1/10 ,  H04R1/22 ,  H04R25/00 ,  H04R25/02

Abstract: PURPOSE:To enable a listner to listen to clear and high fidelity sound by constructing an acoustic tube so that one end of it is an ear attachment and the other end is a non-reflection end and providing an acoustic resistance control means on the back side of a speaker unit. CONSTITUTION:An earphone device mainly consists of an acoustic tube 1, a speaker unit 2 to be attached with its sound emitting surface 2a facing the inside of the tube and a sound resistance tube 6 serving as the acoustic resistance control means provided on the back side of the speaker unit 2. The acoustic tube 1 is formed so that its inner diameter W equals to that Wo of an external ear path A and attached with a ear attachment member 4 used for attaching its one end to an entrance C of the external ear path A. The other end of the acoustic tube 1 is formed with the non-reflection end and formed so that it has the same inner diameter as that W and has more or less a longer length. The acoustic resistance tube 6 is formed so that its one end opposite to the side of the speaker unit is open and that it has a more or less longer length.

公开(公告)号：JPH02116296A

公开(公告)日：1990-04-27

申请号：JP26827488

申请日：1988-10-26

Applicant: SONY CORP

Inventor： SAGAWA HIROYUKI ,  INANAGA KIYOFUMI ,  IIDA YASUHIRO ,  MIURA MASAMI

IPC: H04R1/10 ,  G10K11/22

Abstract: PURPOSE:To shorten the length of an acoustic tube, to miniaturize the whole of a device, and to improve the feeling of putting-on by gradually and successively changing the inside diameter of a non-reflection end side of the acoustic tube. CONSTITUTION:The inside diameter w1 of an acoustic tube 1 is gradually and successively changed from the fitting position of the speaker unit 2 of the acoustic tube 1 toward the non-reflection end 5 side. For instance, the inside diameter w1 is gradually made smaller. Thus, the attenuation of reflection sound in the tube is gradually made larger within a range not to change acoustic impedance in the acoustic tube 1 by gradually and successively making smaller the inside diameter w1 of the acoustic tube 1 to the inside diameter w0 of an external auditory meatus A, the reflection sound can be extinguished at an early stage in the acoustic tube, and the device itself can be miniaturized.

公开(公告)号：JPH0294997A

公开(公告)日：1990-04-05

申请号：JP24637288

申请日：1988-09-30

Applicant: SONY CORP

Inventor： MIURA MASAMI ,  INANAGA KIYOFUMI ,  SAGAWA HIROYUKI ,  IIDA YASUHIRO

IPC: H04R1/10 ,  G10K11/22

Abstract: PURPOSE:To remove an oppressive sensation and to obtain good stability outside a head by making a side confronting with the ear insersion part side of an acoustic tube having an inside diameter approximately same as the inside diameter of external auditory meatus into a sound non-reflection part. CONSTITUTION:The inside diameter W1 of a pair of acoustic tubes 1L and 1R are made approximately same as the inside diameter W0 of the respective right and left external auditory meatus eL and eR, a pair of insersion holes 4L and 4R being a speaker unit fitting part around a circumferential plane in the vicinity of a pair of ear insersion parts 2L and 2R are drilled, and a pair of speaker units 5L and 5R for the right ear and the left are correspondingly fiftted to block these insersion holes 4L and 4R. A side confronting with the respective ear insersion parts 2L and 2R with sandwiching respective speaker units 5 and 5 in the respective acoustic tubes 1L and 1R is made into the sound non-reflection part. Consequently, the acoustic signal which reaches the respective tympanums pL and pR and are reflected by the tympanums pL and pR no longer reaches the abovementioned respective tympanums pL and pR again. Thus, the sense of a normal position inside the head and the generation of the compressive feeling can be prevented.

公开(公告)号：JPH0272800A

公开(公告)日：1990-03-13

申请号：JP22531988

申请日：1988-09-08

Applicant: SONY CORP

Inventor： INANAGA KIYOFUMI ,  SAGAWA HIROYUKI ,  IIDA YASUHIRO ,  MIURA MASAMI

IPC: H04S1/00

Abstract: PURPOSE:To promptly and high-accurately detect the change of the direction of the head part of a listener by calculating the above-mentioned change based on the input signal of a detecting electromagnetic wave signal to be outputted from a detecting sound source device and the phase difference between the output signals of a pair of microphones to be arranged for two parts in the head part to pick up a detecting acoustic signal. CONSTITUTION:Microphones 3 and 4 are arranged for mutually separated two parts in a headphone device 2. An ultrasonic signal is supplied from an ultrasonic oscillating source 8 through the first modulating device 9 to a speaker 6 of a detecting sound source device 5 positioned at a separate position from the listener, and the speaker 6 outputs the detecting acoustic signal. Further, a prescribed frequency signal is supplied from an electromagnetic wave signal oscillating source 11 through the second modulating device 12 to a transmitter 7, and the transmitter 7 transmits the detecting electromagnetic wave signal. The change of the direction of the head part is calculated by an arithmetic unit 13 based on the output signal of a receiving device 21 to receive the detecting electromagnetic wave signal and the phase difference between the output signals of a pair of microphones 3 and 4 to pick up the detecting acoustic signal, and the acoustic signals of a left channel and a right channel are processed by an acoustic processor 26 based on transmission characteristics corresponding to the calculated direction of the head part.