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.
Schematic illustration of the phase correction response (PCR) in simple and subdivided sequences. Thick vertical bars represent beat tones and taps, thin vertical bars represent subdivision tones. Outline bars represent a tone that has been perturbed or a tap that has undergone a phase shift, in the direction of the arrow above the sequence.
