"tones" - key terms from Wikipedia

chest tones
contour tones
diverging tones
dtmf tones
eight tones
five tones
four tones
gem tones
pure tones
ring tones
scale tones
skin tones
sustained tones
telegraph for transmitting musical tones
tones
tones	and semitones
tones	of home
tones	records
two tones
upper partial tones
vietnamese tones
vital tech tones
whole tones
wolfe tones