Audio reproducing apparatus and headphone
First Claim
1. An audio reproducing apparatus comprising:
- a signal source for supplying recorded audio signals in a plurality of channels;
storage means which, after an impulse response from a virtual sound source position with respect to a reference direction of a listener'"'"'s head and both ears corresponding to a head movement of the listener is measured, stores the measured impulse response or which, after a difference in time between audio signals from a virtual sound source position with respect to the reference direction of the listener'"'"'s head and both ears of said listener and a difference in a level therebetween are measured at every angle which the listener can recognize, stores a control signal representing the difference in time between said audio signals and the difference in the level therebetween;
at least one angle detecting means for detecting a head movement of at least one listener with respect to said reference direction at every predetermined angle to output a detection signal;
address signal generating means for converting an angle detected by said angle detecting means into an address signal;
control means for correcting the audio signals in respective channels from said signal source based on the impulse response or the control signal stored in said storage means; and
audio signal reproducing means which has a pair of sound generating units, wherein each of said pair of sound generating units includes a baffle plate forming a 90 degrees angle with a straight line passing through said both ears of the listener, and a diaphram forming an angle with said straight line other than 90 degrees, and wherein said pair of sound generating units is disposed at positions opposed to both ears of the listener and supplied with the audio signals provided by said control means for mounting on the listener'"'"'s head and is provided such that a radiation impedance from an inlet of an external auditory canal of the ear of the listener to the outside becomes approximate to that obtained when the audio reproducing means is not mounted, wherein and address of said storage mean is designated by an address signal output from said address signal generating means based on a detection signal from said angle detecting means, the impulse response or the control signal stored in said storage means is read out therefrom, said control means corrects the audio signals supplied from said signal source with respect to a head movement of said at least one listener in a real-time fashion in response the impulse response or the control signal read out from said storage means, and the radiation impedance of said audio reproducing means from the inlet of the external auditory canal to the outside is set approximate to that obtained when the audio reproducing means is not mounted, thereby sound generation characteristics of said sound generation unit are set approximate to characteristics obtained when said audio signals were recorded.
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Accused Products
Abstract
An object of the present invention is to provide an audio reproducing apparatus which makes a radiation impedance from an inlet of an external auditory canal of a listener to an outside approximate to that obtained when the listener does not put the apparatus, facilitates localization of a reproduced sound image, and allows the listener to feel more comfortable when putting the apparatus on the head. Headphone units (120) of a headphone are disposed so as to be opposed to both the left and right ears (23a), (23b) of a listener (23). Planes of the headphone units (120) opposed to both the left and right ears (23a), (23b) of the listener (23) are provided with being inclined at a predetermined angle forward or backward so as not to be perpendicular to a straight line passing the centers of both the left and right ears (23a), (23b) of the listener (23).
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Citations
41 Claims
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1. An audio reproducing apparatus comprising:
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a signal source for supplying recorded audio signals in a plurality of channels; storage means which, after an impulse response from a virtual sound source position with respect to a reference direction of a listener'"'"'s head and both ears corresponding to a head movement of the listener is measured, stores the measured impulse response or which, after a difference in time between audio signals from a virtual sound source position with respect to the reference direction of the listener'"'"'s head and both ears of said listener and a difference in a level therebetween are measured at every angle which the listener can recognize, stores a control signal representing the difference in time between said audio signals and the difference in the level therebetween; at least one angle detecting means for detecting a head movement of at least one listener with respect to said reference direction at every predetermined angle to output a detection signal; address signal generating means for converting an angle detected by said angle detecting means into an address signal; control means for correcting the audio signals in respective channels from said signal source based on the impulse response or the control signal stored in said storage means; and audio signal reproducing means which has a pair of sound generating units, wherein each of said pair of sound generating units includes a baffle plate forming a 90 degrees angle with a straight line passing through said both ears of the listener, and a diaphram forming an angle with said straight line other than 90 degrees, and wherein said pair of sound generating units is disposed at positions opposed to both ears of the listener and supplied with the audio signals provided by said control means for mounting on the listener'"'"'s head and is provided such that a radiation impedance from an inlet of an external auditory canal of the ear of the listener to the outside becomes approximate to that obtained when the audio reproducing means is not mounted, wherein and address of said storage mean is designated by an address signal output from said address signal generating means based on a detection signal from said angle detecting means, the impulse response or the control signal stored in said storage means is read out therefrom, said control means corrects the audio signals supplied from said signal source with respect to a head movement of said at least one listener in a real-time fashion in response the impulse response or the control signal read out from said storage means, and the radiation impedance of said audio reproducing means from the inlet of the external auditory canal to the outside is set approximate to that obtained when the audio reproducing means is not mounted, thereby sound generation characteristics of said sound generation unit are set approximate to characteristics obtained when said audio signals were recorded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An audio reproducing apparatus comprising:
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a signal source for supplying audio signals in a plurality of channels; storage means which, after an impulse response from a virtual sound source position with respect to a reference direction of a head of a listener and both ears corresponding to a movement of the head of the listener is measured to form a measured impulse response, stores the measured impulse response or which, after a difference in time between the audio signals from the virtual sound source position with respect to the reference direction of the head and said both ears of said listener and a difference in a level therebetween are measured at every angle which the listener can recognize, stores a control signal representing the difference in time between said audio signals and the difference in the level therebetween; at least one angle detecting means for detecting the movement of the head of the listener with respect to said reference direction at every predetermined angle to output a detection signal; address signal generating means for converting an angle detected by said angle detecting means into an address signal; control means for correcting the audio signals in said plurality of channels from said signal source based on the impulse response or the control signal read out from said storage means in response to said address signal; audio signal reproducing means including a pair of sound generating units, wherein each of said pair of sound generating units includes a baffle plate forming a 90 degree angle with a straight line passing through said both ears of the listener, and a diaphragm forming an angle with said straight line other than 90 degrees, and wherein said audio signal reproducing means, which has a microphone provided so as to be opposed to one of said both ears of the listener for mounting on the head of the listener, is supplied with the audio signals corrected by said control means and reproduces the audio signals supplied by said signal source; and an adaptive processing filter which, after reproduction characteristics of the audio signals output from said audio signal reproducing means are measured by said microphone to form measured results, subjects said reproduction characteristics to a smoothing processing based on said measured results to thereby process the audio signals provided by said control means, wherein the impulse response or the control signal of said storage means is designated by the address signal output from said address signal generating means based on the detection signal from said angle detecting means and said control means corrects the audio signals from said signal source are corrected with respect to the movement of the head of the listener in a real-time fashion, and the corrected audio signals in said plurality of channels provided by said control means are processed by said adaptive processing filter by subjecting said reproduction characteristics to said smoothing processing and then reproduced by said audio reproducing means. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A headphone comprising:
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a mount portion which is substantially U-shaped and is mounted on a head of a listener; detecting means provided at a position on said mount portion for detecting a head gyration of the listener; a pair of sound generating units respectively provided at positions on said mount portion opposed, respectively, to both ears of the listener; and supporting means provided on said mount portion for supporting said respective pair of second generating units at positions away from said both ears of the listener at a predetermined distance in a state that said mount portion is mounted on the head of the listener, wherein said supporting means includes a substantially tubular member positioned parallel to a straight line passing through said both ears, a disk-shaped contact portion, and wherein said tubular member is fitted at one end to said mount portion and fitted at another end to said contact portion which is brought in contact with a head side portion around each respective ear of the listener.
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Specification