Post on 19-Dec-2015
Seneff’s Auditory ModelSeneff’s Auditory Model
Miriam Cordero RuizMiriam Cordero Ruiz(SONY Advanced Technology Center Stuttgart)(SONY Advanced Technology Center Stuttgart)
Leuven, july 2002Leuven, july 2002
Human Auditory SystemHuman Auditory Systemband fc(Hz) BW(Hz)
1 50 802 150 1003 250 1004 350 1005 450 1106 570 1207 700 1408 840 1509 1000 16010 1170 19011 1370 21012 1600 24013 1850 28014 2150 32015 2500 38016 2900 45017 3400 55018 4000 70019 4800 90020 5800 110021 7000 130022 8500 180023 10500 250024 13500 3500
Structure of the modelStructure of the model
CRITICAL BAND FILTER
BANK
HAIR CELL SYNAPSE
MODEL
ENVELOPE DETECTOR
SYNCHRONY DETECTOR
Mean rate spectrum
synchrony spectrum
STAGE I STAGE II STAGE III
Stage I: Stage I: Auditory Filter BankAuditory Filter Bank
40 channels (20 - 6700 Hz)
BW1channel=0,5 Barks
Design of the Auditory Filter Design of the Auditory Filter BankBank
INITIAL COMPLEX ZEROES
ZERO OF CASCADE
ZERO OF CASCADE
ZERO OF CASCADE
RESONATOR RESONATOR RESONATOR
CHANNEL 1 CHANNEL 2 CHANNEL 40
…….
f(Hz)
Stages I+IIStages I+II
CRITICAL BANDFILTER BANK
HALFWAVE RECTIFICATION
SHORT-TERM ADAPTATION
LOW PASS FILTER
RAPID AGC
STA
GE I
IS
TA
GE I
Other Peripheral ModelsOther Peripheral Models
•Patterson-Meddis
Gammatone Filterbank
•Lyon’s Cochlear Model
Gammatone Filterbank
Adaptation Stage