Starkey Researcher's Research Presented at Association
for Research in Otolaryngology
Focus: How People in a Loud Room Concentrate on One Conversation
MINNEAPOLIS, Feb. 23, 2009 - Starkey Laboratories, Inc., one of
the world's leading hearing technology companies, is proud to announce that research
conducted by JuanJuan Xiang, a member of the Starkey Research Department, in conjunction
with the University of Maryland and Johns Hopkins University was presented at the
Association for Research in Otolaryngology (ARO) meeting in Baltimore last week.
The ARO is an international association of scientists and physicians dedicated to
scientific exploration in otolaryngology. The poster, called "Competing Streams
at the Cocktail Party - A Neural and Behavioral Study of Auditory Attention,"
focuses on how the brain tunes out other talkers in a loud room in order to concentrate
on one conversation.
"It is very difficult for a person with hearing loss to understand another
person talking in a noisy room where many other people are talking," said Brent
Edwards, Vice President of Research for Starkey. "One of the most pressing
questions among hearing researchers in academia and the hearing aid industry alike
is why people with hearing loss suffer so much more than those who hear normally
in this situation. This is important research and we are proud to have JuanJuan
on our team."
Starkey began its effort to answer this question several years ago when it opened
the Starkey Hearing Research Center and conducted experiments on listening ability
in complex environments. Since that time, the Center has collaborated with researchers
at Boston University, UC Berkeley and UC Davis to help answer this question.
Research Overview
Using magnetoencephalography (MEG), an imaging technique that measures magnetic
fields produced by changes in the brain's electrical activity, the researchers asked
26 volunteers to listen to one of two competing audio streams, while ignoring the
other. The audio streams were comprised of a fast-paced series of beeps and a slower
pattern of beeps, in addition to occasional rhythm changes. The results showed the
people focusing on one of the patterns did not detect changes in the other. In addition,
the brain showed neural activity for both audio streams, but was much more in sync
with the pattern on which he or she was concentrating.
"This research offers a clue into how the brain is able to select which sound
source to pay attention to when there are multiple sources," said Edwards.
"Additionally, it provides a way to use MEG as a diagnostic tool to evaluate
someone's ability to focus attention on single sound sources, which could be a mechanism
for measuring and understanding the effect of both hearing loss and hearing aids
on complex listening situations. This is a step forward toward understanding why
those with hearing loss suffer so significantly in restaurants and other noisy conversational
situations."
This research was funded by the National Institute on Deafness and Other Communication
Disorders.
About Starkey
Starkey Laboratories, Inc. is a privately held, global hearing technology company
headquartered in Eden Prairie, Minn. The company is recognized for its innovative
design, development and distribution of comprehensive digital hearing systems. Founded
in 1967, Starkey employs over 3,500 people, operates 22 facilities and conducts
business in over 100 markets worldwide. For more information, visit
www.starkeypro.com.