Patent application number | Description | Published |
20100316225 | ELECTRO-ACOUSTIC CONVERSION APPARATUS - According to one embodiment, A microphone-earphone includes a speaker connected to an acoustic device configured to measure acoustic characteristics of a listener's external auditory canal, and configured to output an acoustic signal toward the listener's external auditory canal, a microphone device disposed outside the listener's external auditory canal, an acoustic tube including one end connected to the microphone device and the other end opening to the listener's external auditory canal, and a housing including an opening portion which accommodates the speaker and is so disposed as to guide sound, which is output from the speaker, to the listener's external auditory canal. An inside diameter of the acoustic tube is less than a diameter of the opening portion. | 12-16-2010 |
20110158427 | AUDIO SIGNAL COMPENSATION DEVICE AND AUDIO SIGNAL COMPENSATION METHOD - An audio signal compensation device includes: a signal processor configured to perform filtering on an input audio signal; a filter coefficients storage module configured to store a plurality of filter coefficients; a user interface configured to provide options for a determination of filter coefficients to a user and to obtain a selection result from the user; and a filter coefficients determining module configured to determine a set of filter coefficients among the plurality of filter coefficients based on the selection result. The options for the determination of filter coefficients are produced by selecting a first filter coefficient and a second filter coefficient from the plurality of filter coefficients, the first filter coefficient corresponding to a first characteristic quantity of external auditory canal characteristics, the second filter coefficient corresponding to a second characteristic quantity of the external auditory canal characteristics which is predicted based on the first characteristic quantity. | 06-30-2011 |
20110274292 | ACOUSTIC CHARACTERISTIC CORRECTION COEFFICIENT CALCULATION APPARATUS, ACOUSTIC CHARACTERISTIC CORRECTION COEFFICIENT CALCULATION METHOD AND ACOUSTIC CHARACTERISTIC CORRECTION APPARATUS - According to one embodiment, an acoustic characteristic correction coefficient calculation apparatus includes a frequency converter, a smoother, a frequency inverter, a cutter, and a calculator. The frequency converter is configured to convert a first impulse response corresponding to an input acoustic signal to a frequency domain. The smoother is configured to smooth amplitude and phase corresponding to the frequency domain converted by the frequency converter. The frequency inverter is configured to convert a frequency characteristic smoothed by the smoother to a time domain. The cutter is configured to cut out a second impulse response configured by the time domain obtained by converting the frequency characteristic by use of the frequency inverter by a preset tap number. The calculator is configured to calculate a correction coefficient used to correct an acoustic characteristic based on a result cut out by the cutter. | 11-10-2011 |
20120134502 | Audio Correction Apparatus and Audio Correction Method - According to one embodiment, audio correction apparatus connected to audio player, includes output module configured to output audio signal as sound, and filter configured to correct the audio signal based on tap coefficient is provided. The apparatus includes, audio measurement module configured to pick up plurality of recording signals obtained by recording sound output from output module at detection points located at different points, audio analyzer configured to calculate plurality of frequency responses based on plurality of recording signals obtained by audio measurement module, and audio correction module configured to calculate maximum amplitude response by specifying maximum amplitude for each of frequencies, to calculate average group delay property for each of frequencies, to calculate tap coefficient based on maximum amplitude and average group delay property, and to output tap coefficient to filter of audio player. | 05-31-2012 |
20120219161 | PLAYBACK APPARATUS, AUDIO DATA CORRECTION APPARATUS AND PLAYBACK METHOD - According to one embodiment, a playback apparatus includes a generator, a corrector, and an audio signal output module. The generator is configured to generate correction data used for correcting a frequency characteristic of sound output from a headphone based on first data and second data, the first data indicating the frequency characteristic of sound output from the headphone, and the second data indicating a target frequency characteristic. The corrector is configured to correct audio data based on the correction data. The audio signal output module is configured to output an audio signal based on the corrected audio data to the headphone. | 08-30-2012 |
20130028429 | INFORMATION PROCESSING APPARATUS AND METHOD OF PROCESSING AUDIO SIGNAL FOR INFORMATION PROCESSING APPARATUS - According to one embodiment, an information processing apparatus includes a measurement module and a correction filter design module. The measurement module measures frequency characteristics of an earphone connected to an output terminal using a measurement audio signal output from the output terminal and collected by a microphone. The correction filter design module designs a correction filter in association with one range of a treble range higher than a crossover frequency range and a bass range lower than the crossover frequency range, based on the measured frequency characteristics of the earphone and predetermined goal frequency characteristics. | 01-31-2013 |
20130223636 | MEASUREMENT APPARATUS AND MEASUREMENT METHOD - According to one embodiment, a measurement apparatus is configured to supply, to a output device, a second measurement signal to sweep the frequency, to receive a second received signal output from the output device when the second measurement signal is supplied to the output device, and to calculate an impulse response by convolving the second received signal and an inverted measurement signal having an inverted characteristic of the second measurement signal. The second measurement signal has a signal characteristic obtained by multiplying the first measurement signal by a characteristic of a characteristic of the amplitude spectrum. | 08-29-2013 |
20130315405 | SOUND PROCESSOR, SOUND PROCESSING METHOD, AND COMPUTER PROGRAM PRODUCT - According to one embodiment, sound processor includes: communication module; outputting module; recording module; display; input module; controller; and calculating module. The controller (i) displays, on display, message prompting user to move a sound input device to position proximate to speaker, (ii) causes the outputting module to output the test sound and causes the recording module to record first sound, (iii) displays, after the first sound is recorded, on the display, message prompting the user to move the sound input device to listening position, and (iv) causes the outputting module to output the test sound and causes the recording module to record second sound. The calculating module finds a first frequency characteristic of the first sound and a second frequency characteristic of the second sound, and calculates, based on a difference between the first and second frequency characteristics, a value for correcting the second frequency characteristic to a target frequency characteristic. | 11-28-2013 |
20130329899 | MEASURING APPARATUS AND COMPUTER PROGRAM - According to one embodiment, a measuring apparatus includes: an output module configured to temporally exclusively output, to a measuring target system, a first output signal corresponding to a first measuring signal for sweeping frequency and a second output signal corresponding to a second measuring signal for sweeping frequency and having a different amplitude characteristic from an amplitude characteristic of the first measuring signal; and a frequency characteristic computation module configured to synthesize a first frequency amplitude spectrum obtained from a first reception signal when a sound output from the measuring target system based on the first output signal is received and a second frequency amplitude spectrum obtained from a second reception signal when a sound output from the measuring target system based on the second output signal is received to generate frequency characteristic data representing an acoustic characteristic. | 12-12-2013 |