Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Envelope magnitude spectra of echo stimuli presented in the neurophysiological experiments. Unlike the magnitude spectra of the wave form (compare Fig. 1, right column), the envelope spectra vary systematically with roughness. With increasing roughness, the envelope magnitude increases for all envelope frequencies; however, the increase is most pronounced in the envelope-frequency range, ∼500 Hz.
