Abstract: An apnea episode determination device includes, a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, detecting a breathing segment and a midway segment from a sound signal during sleep, the breathing segment being considered to include a breathing sound, the midway segment existing in between the breathing segments; calculating an acoustic feature based on a background noise component and a signal component excluding the background noise component, which are included in the midway segment; and determining that the midway segment is an apnea episode when the acoustic feature meets a preset condition.

Abstract: An audio processing device includes a setting section that sets a reproduction sampling frequency Fplay and a recording sampling frequency Frec higher than Fplay, a digital-to-analog converter that based on Fplay converts a sound source signal that is a digital signal into a reproduction signal that is an analog signal, an analog-to-digital converter that based on Frec converts a recording signal that is an analog signal converter into an input signal that is a digital signal, a signal separator that separates the input signal into a low region signal contained in a band of less than Fplay and a high region signal contained in a band of the Fplay and higher, and a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal.

Abstract: A voice control device includes a calculation section configured to calculate a response time representing a time difference between a voice in a received signal and a voice in a sending signal; a hearing estimate section configured to estimate hearing of a user based on the calculated response time; and a voice control section configured to control the received signal by a compensation quantity responsive to the estimated hearing.

Abstract: A voice control device includes a hearing estimate section configured to estimate hearing of a user based on a sending/received sound ratio representing a ratio of the volume of a sending sound to the volume of a received sound; a compensation-quantity calculating section configured to calculate a compensation quantity for a received signal of the received sound responsive to the estimated hearing; and a compensation section configured to compensate the received signal based on the calculated compensation quantity.

Abstract: A voice correction device includes a detector that detects a response from a user, a calculator that calculates an acoustic characteristic amount of an input voice signal, an analyzer that outputs an acoustic characteristic amount of a predetermined amount when having acquired a response signal due to the response from the detector, a storage unit that stores the acoustic characteristic amount output by the analyzer, a controller that calculates an correction amount of the voice signal on the basis of a result of a comparison between the acoustic characteristic amount calculated by the calculator and the acoustic characteristic amount stored in the storage unit, and a correction unit that corrects the voice signal on the basis of the correction amount calculated by the controller.

Abstract: An audio processing device includes a setting section that sets a reproduction sampling frequency Fplay and a recording sampling frequency Frec higher than Fplay, a digital-to-analogue converter that based on Fplay converts a sound source signal that is a digital signal into a reproduction signal that is an analogue signal, an analogue-to-digital converter that based on Frec converts a recording signal that is an analogue signal converter into an input signal that is a digital signal, a signal separator that separates the input signal into a low region signal contained in a band of less than Fplay and a high region signal contained in a band of the Fplay and higher, and a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal.

Abstract: A signal processing device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, receiving speech of a speaker as a first signal; detecting an expiration period included in the first signal; extracting a number of phonemes included in the expiration period; and controlling, a second signal, which is an output to the speaker, on the basis of the number of phonemes and a length of the expiration period.

Abstract: A voice control device includes a calculation section configured to calculate a response time representing a time difference between a voice in a received signal and a voice in a sending signal; a hearing estimate section configured to estimate hearing of a user based on the calculated response time; and a voice control section configured to control the received signal by a compensation quantity responsive to the estimated hearing.

Abstract: A voice control device includes a hearing estimate section configured to estimate hearing of a user based on a sending/received sound ratio representing a ratio of the volume of a sending sound to the volume of a received sound; a compensation-quantity calculating section configured to calculate a compensation quantity for a received signal of the received sound responsive to the estimated hearing; and a compensation section configured to compensate the received signal based on the calculated compensation quantity.

Abstract: An apnea episode determination device includes, a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, detecting a breathing segment and a midway segment from a sound signal during sleep, the breathing segment being considered to include a breathing sound, the midway segment existing in between the breathing segments; calculating an acoustic feature based on a background noise component and a signal component excluding the background noise component, which are included in the midway segment; and determining that the midway segment is an apnea episode when the acoustic feature meets a preset condition.

Abstract: A reverberation suppression device includes, a first storage unit configured to store, in advance, information representing a first impulse response obtained from a signal output from a microphone when a sound source positioned according to directivity of either a speaker or the microphone, which are mounted on a mobile terminal, outputs an impulse; a second storage unit configured to store information representing a second impulse response obtained from a signal output from the microphone when the speaker mounted on the mobile terminal outputs an impulse in a room where reverberation sound is to be suppressed; a response correction unit configured to obtain a corrected impulse response, which reflects the room's environment, by correcting the second impulse response, which is represented by the information stored in the second storage unit, using the information representing the first impulse response; and a sound correction unit configured to correct a sound signal

Abstract: A voice correction device includes a detector that detects a response from a user, a calculator that calculates an acoustic characteristic amount of an input voice signal, an analyzer that outputs an acoustic characteristic amount of a predetermined amount when having acquired a response signal due to the response from the detector, a storage unit that stores the acoustic characteristic amount output by the analyzer, a controller that calculates an correction amount of the voice signal on the basis of a result of a comparison between the acoustic characteristic amount calculated by the calculator and the acoustic characteristic amount stored in the storage unit, and a correction unit that corrects the voice signal on the basis of the correction amount calculated by the controller.