The dip minus constant condition contrast specifically exposes compression’s effect

Evidence

The nonsense words were then adjusted to produce the two level conditions illustrated in Fig. 1 : In the “dip” condition (left column), the level of the second syllable was 70, 60, 50 or 40 dB, while the first and third syllables were fixed at 70 dB. In the “constant” condition (right column), all three syllables were set to 70, 60, 50 or 40 dB. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4049

Categorization

Category: Causal Relationships

• DEFINE: Clarifies the experimental logic: comparing syllable recognition when adjacent syllables are louder (dip) versus uniform level (constant) isolates compression.

Related

• The dip condition isolates how a soft syllable embedded between louder ones is perceived (similarity 0.90)
• Comparing dip and constant levels isolates how relative loudness shifts affect syllable perception. (similarity 0.89)
• Comparing syllable-level dips against whole-word level changes isolates peripheral compression effects (similarity 0.89)
• Compression loss most impairs recognition when a syllable is relatively quieter than its neighbors. (similarity 0.82)
• Volume compression worsens speech intelligibility by flattening syllabic amplitude cues (similarity 0.80)
• Model-based hearing-impairment simulation isolates the compression component of auditory processing (similarity 0.79)
• Speech-level dips and impairment type independently affect syllable recognition with no interaction (similarity 0.79)
• Loss of cochlear compression most harms speech recognition of intensity-attenuated syllables (similarity 0.78)