A mixing apparatus having a stereo output includes: a first signal processor that mixes a first signal and a second signal in a first channel; a second signal processor that mixes a third signal and a fourth signal in a second channel; a third channel that processes a weighted sum of a signal of the first channel and a signal of the second channel; and a gain deriving part that generates a gain mask commonly used in the first channel and the second channel, wherein the gain deriving part determines a first gain commonly applied to the first signal and the third signal, and a second gain commonly applied to the second signal and the fourth signal, so that predetermined conditions for simultaneous gain generation are satisfied at least at the first channel and the second channel among the first channel, the second channel, and the third channel.

A method, computer program product, and computing system for receiving one or more inputs indicative of at least one of: a relative location of a speaker and a microphone array, and a relative orientation of the speaker and the microphone array. One or more reference signals may be received. A speech processing system may be trained using the one or more inputs and the one or more reference signals.

A method, computer program product, and computing system for receiving one or more inputs indicative of at least one of: a relative location of a speaker and a microphone array, and a relative orientation of the speaker and the microphone array. One or more reference signals may be received. A speech processing system may be trained using the one or more inputs and the one or more reference signals.

An exemplary system includes a processor communicatively coupled to a memory and configured to execute instructions to generate a modified audiogram for a user of a hearing device. The modified audiogram may be based on a frequency lowering scheme that maps at least some audio frequencies included in a first set of audio frequencies to relatively lower audio frequencies to form a second set of audio frequencies. The modified audiogram may indicate a set of modified hearing thresholds of the user at the first set of audio frequencies. The generating of the modified audiogram may include applying an inverse of the frequency lowering scheme to the set of modified hearing thresholds at the second set of audio frequencies to obtain the set of modified hearing thresholds of the modified audiogram at the first set of audio frequencies.

An exemplary system includes a processor communicatively coupled to a memory and configured to execute instructions to generate a modified audiogram for a user of a hearing device. The modified audiogram may be based on a frequency lowering scheme that maps at least some audio frequencies included in a first set of audio frequencies to relatively lower audio frequencies to form a second set of audio frequencies. The modified audiogram may indicate a set of modified hearing thresholds of the user at the first set of audio frequencies. The generating of the modified audiogram may include applying an inverse of the frequency lowering scheme to the set of modified hearing thresholds at the second set of audio frequencies to obtain the set of modified hearing thresholds of the modified audiogram at the first set of audio frequencies.

Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T.sub.0 corresponding to a pitch period of the time segment, a pitch gain σ.sub.0 of the time segment, a predetermined constant B.sub.0, and a value greater than 0 and less than 1, to (2) the signal of the time.

Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T.sub.0 corresponding to a pitch period of the time segment, a pitch gain σ.sub.0 of the time segment, a predetermined constant B.sub.0, and a value greater than 0 and less than 1, to (2) the signal of the time.

Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T.sub.0 corresponding to a pitch period of the time segment, a pitch gain σ.sub.0 of the time segment, a predetermined constant B.sub.0, and a value greater than 0 and less than 1, to (2) the signal of the time.

Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T.sub.0 corresponding to a pitch period of the time segment, a pitch gain σ.sub.0 of the time segment, a predetermined constant B.sub.0, and a value greater than 0 and less than 1, to (2) the signal of the time.

Provided is pitch enhancement processing having little unnaturalness even in time segments for consonants, and having little unnaturalness to listeners caused by discontinuities even when time segments for consonants and other time segments switch frequently. A pitch emphasis apparatus carries out the following as the pitch enhancement processing: for a time segment in which a spectral envelope of a signal has been determined to be flat, obtaining an output signal for each of times in the time segment, the output signal being a signal including a signal obtained by adding (1) a signal obtained by multiplying the signal of a time, further in the past than the time by a number of samples T.sub.0 corresponding to a pitch period of the time segment, a pitch gain σ.sub.0 of the time segment, a predetermined constant B.sub.0, and a value greater than 0 and less than 1, to (2) the signal of the time.