Millisecond sound patterns trigger distinct brain responses in humans and rats

Researchers published a study in PLOS Biology on October 8, 2026, investigating how mammals process fine temporal structures in acoustic signals. PLOS Biology reported that click-train patterns with identical average inter-click intervals, but differing millisecond-scale timing, evoke discriminable behavioral and neural responses in both humans and rats. [1]

Natural sounds carry information through both spectral content, which refers to frequency, and temporal patterning, which involves timing. PLOS Biology reported that sensitivity to these millisecond-scale temporal variations increases progressively from the auditory midbrain to the cerebral cortex. The findings show that corticothalamic feedback and the hierarchy of the cortex shape these responses. [1]

Echolocation, also called bio sonar, is an active biological sonar that animals use in air and underwater. Animals emit acoustic calls and listen to returning echoes to locate objects, navigate, and hunt prey. [2]

The research establishes that auditory systems process rapid timing variations beyond basic spectral information. PLOS Biology reported that understanding these millisecond-scale temporal representations clarifies how the mammalian brain decodes complex natural sounds. [1]