Cues for tone-in-noise detection: Evidence from constant-stimuli and adaptive approaches

Area of Science:

• Auditory perception
• Psychoacoustics
• Signal detection theory

Background:

• Tone-in-noise (TIN) detection is crucial for understanding speech and sound perception.
• Existing research presents conflicting findings on the primary auditory cues listeners utilize for TIN detection.
• The relative importance of spectral (level) and temporal cues in TIN detection remains debated.

Purpose of the Study:

• To investigate the specific roles of level and temporal cues in TIN detection.
• To examine how manipulating access to these cues influences detection performance.
• To determine if individual differences in cue weighting exist and are consistent.

Main Methods:

• Utilized a within-subjects design with 24 young normal-hearing listeners.
• Employed narrowband and broadband noise conditions to vary spectral content.
• Manipulated access to level cues (spectral rescaling) and temporal cues (signal replacement).
• Used both adaptive and constant-stimuli procedures to measure detection thresholds and performance without feedback.

Main Results:

• Both level and temporal cues were found to contribute significantly to TIN detection.
• Level cues played a more dominant role in the narrowband noise condition.
• Performance under adaptive procedures correlated with performance under constant-stimuli, indicating stable individual cue weighting.

Conclusions:

• Both spectral (level) and temporal cues are essential for effective tone-in-noise detection.
• The salience and utility of these cues can vary depending on the acoustic environment (e.g., noise bandwidth).
• Individual listeners exhibit consistent preferences for weighting specific auditory cues in detection tasks.