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.
Images of the pure-tone audiogram. A: The initial examination shows low frequency hearing loss in the left ear. B: Five days after the initial examination, the audiogram shows improvement of left-side hearing to normal. C: Twelve days after the initial examination, the audiogram shows low frequency hearing loss in the left ear. dB: decibel, Hz: hertz.
