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Causal inference in environmental sound recognition.

James Traer1, Sam V Norman-Haignere2, Josh H McDermott3

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Summary
This summary is machine-generated.

Humans infer sound source intensity, like the power of a pepper grinder versus a truck, using acoustic cues. This helps identify environmental sounds, showing our brains process physical causes.

Keywords:
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Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Cognitive science

Background:

  • Sound recognition is fundamental to understanding the environment.
  • Humans may infer physical properties of sound sources, such as their intensity or power.
  • Acoustic cues like sound intensity at the ear and reverberation provide information about source intensity and distance.

Purpose of the Study:

  • To investigate whether human sound recognition relies on inferring the source intensity (power) of environmental sounds.
  • To test if acoustic cues (intensity at the ear, reverberation) are used to infer source intensity for sound recognition.
  • To compare two hypotheses: inferring source intensity versus invariant recognition by separating acoustic cues.

Main Methods:

  • Measured recognition accuracy for sounds with typically low or high source intensity.
  • Manipulated presentation intensity at the ear and reverberation cues to distance.
  • Compared effects of these manipulations on low- versus high-intensity sources.

Main Results:

  • Recognition of low-intensity sources was impaired by high presentation intensity or reverberation, which imply high source intensity.
  • These impairments did not occur for high-intensity sources.
  • Listeners implicitly use intensity and distance cues to infer source power.

Conclusions:

  • Sound recognition depends on inferring physical generative parameters of sound sources.
  • Listeners integrate acoustic cues like intensity and reverberation to estimate source power.
  • This suggests a sophisticated cognitive process linking acoustics to physical causality in sound perception.