Natural music context biases musical instrument categorization

Area of Science:

• Auditory perception
• Psychoacoustics
• Music cognition

Background:

• Auditory perception is influenced by surrounding sounds, leading to spectral contrast effects (SCEs).
• SCEs bias the categorization of speech and music, and have been observed in naturalistic listening conditions for speech.
• Previous research demonstrated SCEs using filtered sounds, but the effect of naturalistic music contexts remained less understood.

Purpose of the Study:

• To investigate whether natural, unfiltered music contexts bias the categorization of musical instruments.
• To determine if spectral contrast effects (SCEs) extend to the perception of French horn and tenor saxophone sounds within natural musical contexts.
• To compare the influence of filtered versus unfiltered musical contexts on instrument categorization.

Main Methods:

• Participants listened to target musical instrument sounds (French horn, tenor saxophone) preceded by different contexts.
• Contexts included unfiltered solo performances of the instruments and filtered string quintets emphasizing specific spectral frequencies.
• Experiments varied context duration (1 or 3 seconds) and filtering.

Main Results:

• Both filtered and unfiltered musical contexts induced SCEs, biasing instrument categorization (e.g., horn contexts led to more "saxophone" responses and vice versa).
• One-second filtered contexts produced significant SCEs, consistent with prior studies.
• One-second unfiltered contexts did not produce significant SCEs, while 3-second unfiltered contexts showed a weaker bias compared to filtered contexts.

Conclusions:

• Spectral contrast effects (SCEs) can bias the categorization of musical instruments in naturalistic listening conditions.
• The effectiveness of SCEs depends on context characteristics, including filtering and duration.
• These findings extend the understanding of SCEs in music perception to more ecologically valid auditory environments.