Modulation of speech signals

摘要

Methods, systems, and devices for processing an audio signal are provided. An example method includes mapping a fundamental frequency of an audio signal to a modulation frequency. An output of the mapping is less than the fundamental frequency when the fundamental frequency is greater than an intersection frequency. The intersection frequency is a frequency at which the output of the mapping is the fundamental frequency.

主权项

1. A sound processor configured to:
receive an audio signal that includes voiced speech; based on the audio signal, (i) generate a spectral signal, (ii) determine a modulation frequency such that the modulation frequency is within a range of pitch frequencies a recipient is capable of perceiving, wherein a ratio of the modulation frequency to a fundamental frequency of the voiced speech is less than one over the range of pitch frequencies, and (iii) modulate at the modulation frequency one or more spectral components of the spectral signal to generate a modulated spectral signal; and send the modulated spectral signal to an output device, thereby causing the output device to deliver an output that is configured to allow the recipient to perceive at least a portion of the audio signal.