Abstract:
PURPOSE:To substantially eliminate a crosstalk by placing a loudspeaker unit in a prescribed position in front of listener's ears. CONSTITUTION:Loudspeaker units 10A, 10B are separated from each other, and a relative arrangement of two units 10A, 10B and a listener 14 can be attained by moving the units 10A, 10B to the listener 14, or by the listener 14 moving to the units 10A, 10B. The units 10A, 10B are arranged on both sides of the listener 14, and also, symmetrically thereto. Also, loudspeakers installed in front of the units 10A, 10B are arranged so as to insert and hold the listener's head part in front of the listener 14, and also, in height of the listener's ears. It is desirable that they are arranged so that an angle between the front in which the loudspeakers are installed and a directrix passing through the listener's both ears is within + or -10 degrees. Moreover, the loudspeakers are opposed to the body surface which passes through both ears of the listener 14 and passes through the center line of the body and arranged in a prescribed position from both ears of the listener. Therefore, a crosstalk to the listener's ears is eliminated substantially.
Abstract:
PURPOSE:To localize a sound image to the outside from right and left speakers for reproducing stereo and to widen a hearing range with simple constitution. CONSTITUTION:An audio signal from a sound source 11 is sent to the channel at the side opposite to the direction to localize a sound image through a filter 12 for removing a crosstalk and sent to the channel in the direction to localize the sound image through a delaying circuit 14. The transfer characteristic of the filter 12 is Hs(f)/Ho(f), and here, Hs(f) is the transfer characteristic from a speaker up to the ear at the same side and Ho(f) is the transfer characteristic up to the ear at the opposite side. Into the channel of the side opposite to the direction to localize the sound image, the delaying circuit 14 to adjust the time base with the channel to insert the filter 12 is inserted.
Abstract:
PURPOSE:To improve a sound collecting effect by improving the acoustic frequency characteristics of a hearing aid, improving a feeling of physical disorder and a sense of oppression and arranging a microphone unit in the vicinity of the inlet of an external auditory meatus. CONSTITUTION:The hearing aid 10 is constituted of an acoustic tube 14 formed so that its inner diameter is almost the same as that of an external auditory meatus 22, its one end side is an ear fitting part 16 and the other end is a sound non-reflecting end 17, an earphone driver unit 24 arranged in the ear fixing part (16) side hollow tube of the acoustic tube 14 and a microphone unit 30 fitted and fixed to/on the outer periphery of the ear fixing part 16. The ear fixing part 16 is projecting from a hearing aid body 12 by a prescribed length in order to improve its using procedure.
Abstract:
PURPOSE:To promptly, high-accurately, and stably detect the change of the direction of the head part of a listener by calculating the above-mentioned change based on 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 signal to be outputted from a detecting sound source to be supported by the body part of the listener. CONSTITUTION:Microphones 3 and 4 are arranged for mutually separated two parts in a headphone device 2. A speaker 10 to be the detecting sound source is fitted to the covering member of a composite cable 9 so that the speaker 10 can be supported by the chest part of the listener when the headphone device 2 is fitted to the head part M of the listener. An ultrasonic signal P from an ultrasonic signal source 12 is supplied through an adder 13a, right side acoustic signal input terminal 5R, and a high-pass filter 11 to the speaker 10. The output signals of the microphones 3 and 4 are signals to pick up an ultrasonic wave to be outputted from the speaker 10, and an arithmetic unit 14 calculates the change of the direction of the head part based on the phase difference between the output signals of both the microphones and processes the acoustic signals of a left channel and a right channel from an acoustic signal supplying source 22 based on transmission characteristics corresponding to the calculated direction of the head part.
Abstract:
PROBLEM TO BE SOLVED: To reduce a pausing phenomenon of voice by a method of regenerating a voice signal from a recording medium at a speed faster than a normal speed and outputting at a normal interval. SOLUTION: Input data Si obtained by double-speed regeneration are divided for respective processing unit periods T1, T2, ... each equivalent to 60 m/sec. In the period T1, voice parts and non-voice parts are present individually for 30 m/s, every non-voice part is removed, the voice parts before and after thereof are connected to each other, and only all data of the voice part are written into an output buffer. In the period T2, all data for 60 m/sec are the voice part, and the data of the voice part are written into the output buffer without change. If the voice part is present for less than 30 m/sec in the period T2, a part of the non-voice part is added to every voice part, and data for 30 m/sec are written into the output buffer. In the period T5, all data for 60 m/sec are the voice part, and the data are compressed to data for 30 m/sec to be written into the output buffer because the output buffer does not have a free area sufficient to store all of data for 60 m/sec. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a sound signal generating apparatus capable of forming an optimum sound field, and to provide a sound field reproducing apparatus, a sound signal generation method, and a computer program. SOLUTION: The sound signal generating apparatus 115 includes: a conversion part 140 for performing conversion processing of converting a virtual sound source formed by wavefront synthesis from sound information and sound source position information when an array speaker condition which is the condition of an array speaker and a standard array speaker condition are different in the virtual sound sources formed by the wavefront synthesis from the sound information and the sound source position information; and a sound signal generation part 130 for generating the sound signals of m channels for forming the virtual sound source using the sound information, the sound source position information and a converted result in the conversion part 140. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a stereo reproducing apparatus capable of reproducing a rich low sound without requiring much space. SOLUTION: The apparatus is provided with filters 23L, 23M, 23R for dividing audio signals L, R into a low-pass component ML of a frequency in which the performance of directional localization of a sound image reduces and high-pass components LH, RH of a frequency equal to or more than the frequency of the low-pass component ML. The apparatus is provided with processing circuits CF1-CF24 for processing the low-pass component ML so that the sound wave may be wavefront-synthesized to form a virtual sound source when the low-pass component ML is output from a speaker array SP1-SP24 as the sound wave. The apparatus is provided with a control circuit 31 for changing the position of the virtual sound source to control at least any one of the radiation direction of the sound wave and the curvature of a sound wave front. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a sound reproduction device and its method that can reproduce an intended acoustic field with a wide range. SOLUTION: By a low-frequency speaker system 5, low-frequency sounds are outputted formed with sound wave surfaces by which a desired sound field is obtainable, and thereby overall sound image localization in a wide listening range is obtained with regard to the low-frequency sounds. Furthermore, by outputting high-frequency sounds from a high-frequency speaker system 6 with a predetermined time delay, it becomes possible that users are made to perceive the sound image of the high-frequency sounds at the absolute sound image position of the low-frequency sounds outputted from a low-frequency reproduction means, even if the sound image of the high-frequency sounds outputted from the high-frequency speaker system 6 deviates from the absolute sound image position. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To perform surely the control for the inhibition whereby a broadcast program is so recorded or reproduced as not to skip or fast forward its commercial portion. SOLUTION: When recording a received broadcast program on the recording medium in a recording and reproducing portion 47, a system controlling portion 48 senses a multiplexed commercial starting pre-notice-information by an additional-information sensing portion 43 at a predetermined time prior to the time, whereat the broadcast program is switched from its main portion into its commercial portion. Then, the system controlling portion 48 so controls the recording and reproducing portion 47 that it inhibits the stop or the temporary stop of the recording of the commercial portion. When reproducing the broadcast program, the system controlling portion 48 senses also the multiplexed commercial starting pre-notice-information at a predetermined time prior to the time, whereat the broadcast program is switched from its main portion into its commercial portion. Then, the system controlling portion 48 so controls the recording and reproducing portion 47 that it inhibits the stop or the temporary stop of the reproducing of the commercial portion.
Abstract:
PROBLEM TO BE SOLVED: To provide a voice processing device in which deterioration for listening a voice and music sound caused by an environmental noise and hearing trouble is improved. SOLUTION: This device is provided with an extracting circuit 22 taking out a signal component S22 of a basic resonant frequency of this voice signal S11. Further, the device is provided with circuits 12, 23 increasing a level of a signal component of a frequency of integral multiple of a resonant frequency out of signal components of the voice signal S11 corresponding to the signal component S22 of a resonant frequency taken out from the extracting circuit 22.