Kurt Yankaskas1, Tanisha Hammill2, Mark Packer3, Jian Zuo4. 1. Office of Naval Research, Department of the Navy, USA. Electronic address: kurt.d.yankaskas@navy.mil. 2. Hearing Center of Excellence, Dept of Defense, USA. Electronic address: tanisha.l.hammill.ctr@mail.mil. 3. Hearing Center of Excellence, Dept of Defense, USA; St. John's Mercy Hospital, Sound Health Services, St. Louis, MO, USA. Electronic address: mpacker@soundhealthservices.com. 4. St. Jude Children's Research Hospital, USA. Electronic address: jian.zuo@stjude.org.