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.
Iso-loudness contours constructed by finding the median level in dB SPL assigned to each loudness category as a function of audiometric-threshold group with CU as the parameter (shown as different symbols). The lines represent best fits to the data for each CU.
