An encoder converts the digital data into audio tones that synthesize {TAIL ~ frequency characteristics} of {HEAD ~ human speech} 
An encoder converts the digital data into audio tones that synthesize { TAIL ~ frequency characteristics } of { HEAD ~ human speech }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD