Voice evaluation method, voice evaluation apparatus, and recording medium for evaluating an impression correlated to pitch

A voice evaluation method executed by a computer, the voice evaluation method comprising:

• analyzing a voice signal to detect a pitch frequency;
• selecting an evaluation target region to be evaluated in the detected pitch frequency based on a distribution of a detection rate of the detected pitch frequency;
• correcting the distribution by multiplying a pitch frequency corresponding to a central portion of the distribution by a first weight and multiplying a pitch frequency corresponding to a tail portion of the distribution by a second weight smaller than the first weight;
• evaluating impression of the voice based on a spread of the corrected distribution of the detection rate and the selected evaluation target region;
• and
• determining the impression of the voice is good when a spread of the distribution is larger than or equal to a certain threshold.

A voice evaluation apparatus comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• analyze a voice signal to detect a pitch frequency;
• and
• select an evaluation target region to be evaluated in the detected pitch frequency based on a distribution of a detection rate of the detected pitch frequency,
• correct the distribution by multiplying a pitch frequency corresponding to a central portion of the distribution by a first weight and multiplying a pitch frequency corresponding to a tail portion of the distribution by a second weight smaller than the first weight;
• evaluate impression of the voice based on a spread of the corrected distribution of the detection rate and the selected evaluation target region;
• and
• determining the impression of the voice is good when a spread of the distribution is larger than or equal to a certain threshold.