The definition of Tourette Syndrome, shown below, requires that sounds be present.
Sounds are more often described as Phonic Tics. Some definitions of a tic refer to vocal tics, however, more recent definitions refer to them as phonic tics. A vocal tic requires the use of the vocal chords in tics such as throat clearing or gurgling. A phonic tic includes sounds such as sniffing and whistling. Both are considered sounds for the purpose of diagnosing TS.