Speech-material and talker effects in speech band importance

Area of Science:

• Acoustics
• Speech Processing
• Psychoacoustics

Background:

• Band-importance functions quantify speech audibility across frequency bands.
• Existing methods like the ANSI technique offer limited detail.
• The compound method provides enhanced resolution for analyzing speech characteristics.

Purpose of the Study:

• To re-examine the influence of speech material and talker on band-importance functions using the compound method.
• To investigate whether detailed functions reflect individual talker acoustic idiosyncrasies.
• To compare the relative contributions of speech material and talker effects.

Main Methods:

• Generated 21 band-importance functions using the compound method.
• Utilized standard speech materials recorded by multiple talkers.
• Analyzed similarities and differences between functions based on speech material and talker.

Main Results:

• Band-importance functions were more similar for the same speech material across different talkers.
• Functions varied more for the same talker producing different speech materials.
• Talker effects were minimal, primarily limited to gender, and diminished with multiple talkers.

Conclusions:

• Speech material exerts a stronger influence on band-importance function shape than individual talker characteristics.
• The compound method reveals robust speech-material effects, overshadowing subtle talker-specific acoustic features.
• Findings suggest speech content is a primary determinant of auditory salience across frequency bands.