The invention further relates to {TAIL ~ a corresponding processing device} and {HEAD ~ a listening device} with such a processing device 
The invention further relates to { TAIL ~ a corresponding processing device } and { HEAD ~ a listening device } with such a processing device
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH