▁with ▁Raymond ▁Car hart ▁in ▁A udi ology ▁at ▁North western ▁and ▁became ▁a ▁full ▁professor ▁seven ▁years ▁later . ▁His ▁entire ▁fac ulty ▁career , ▁which ▁sp anned ▁fifty ▁years , ▁was ▁at ▁North western ▁University . ▁In ▁ 1 9 7 7 - 7 8 ▁he ▁spent ▁a ▁s abb at ical ▁year ▁at ▁the ▁Kar olin ska ▁Institut et , ▁Stockholm , ▁Sweden , ▁working ▁with ▁Å ke ▁F lock . ▁ ▁In ▁ 1 9 9 1 ▁he ▁was ▁rec ru ited ▁to ▁be ▁the ▁found ing ▁chair ▁of ▁the ▁new ▁Department ▁of ▁Ne uro bi ology ▁and ▁Phys i ology . ▁Later ▁he ▁served ▁terms ▁as ▁Associ ate ▁Dean ▁in ▁the ▁College ▁of ▁Arts ▁and ▁Sciences ▁and ▁as ▁Vice ▁President ▁for ▁Research . ▁He ▁was ▁the ▁found ing ▁Editor - in - Ch ief ▁of ▁the ▁journal ▁Aud itory ▁Neu ros cience ▁( 1 9 9 4 – 9 7 ), ▁served ▁on ▁the ▁Council ▁of ▁Ne uro log y ▁Institute ▁of ▁the ▁N I H ▁( 1 9 8 4 – 8 7 ) ▁and ▁was ▁President ▁of ▁the ▁Association ▁for ▁Research ▁in ▁Ot ol ary ng ology ▁( A RO ; ▁ 1 9 9 2 – 9 3 ), ▁while ▁also ▁serving ▁on ▁numerous ▁other ▁advis ory ▁comm itte es ▁and ▁bo ards ▁and ▁holding ▁various ▁editor ships . ▁ ▁Research ▁Early ▁work ▁per tain ed ▁to ▁el uc id ating ▁the ▁properties ▁and ▁model ing ▁of ▁the ▁ac oust ic ▁ref lex ▁and ▁some