Featured Research

from universities, journals, and other organizations

Hearing Aid Signal Not Clear? Then Switch Frequency To FM, Finds UCI Study

Date:
February 8, 2005
Source:
University Of California - Irvine
Summary:
There's a reason why we listen to music on the FM dial of our radios – it just sounds better than it does on AM. And this reason also holds true for cochlear implants and hearing aids.

Irvine, Calif., Jan. 25, 2005 -- There's a reason why we listen to music on the FM dial of our radios – it just sounds better than it does on AM.

And this reason also holds true for cochlear implants and hearing aids. UC Irvine School of Medicine researchers have found that improving frequency modulation, or FM, reception on cochlear implants and hearing aids may increase the quality of life for the millions of Americans who use these devices.

Dr. Fan-Gang Zeng and his colleagues at UCI and the Peking Union Medical College Hospital in Beijing discovered that enhancing the detection of frequency modulation may significantly boost the performance of many hearing aids and automatic speech recognition devices by separating and blocking out background noise and increasing tonal recognition, which is essential to hearing music and certain spoken languages. Study results appear this week in the early online edition of Proceedings of the National Academy of Sciences.

Some 30 million Americans have some form of hearing loss, and some 4 million of these people benefit from using hearing aids or cochlear implants. But limitation on sound quality and overamplification of background sound can hinder their uses.

"Many hearing-aid – particularly cochlear-implant – users have trouble enjoying music or listening to conversation in a crowded room," said Zeng, research director of the Hearing and Speech Lab at UCI. "But we've found that FM modifications to both existing and future devices may overcome these difficulties."

Known as a leading expert in cochlear-implant research, Zeng and his colleagues looked into the reasons behind these limitations, specifically focusing on the two parameters of sound: amplitude (the height of a sound wave) and the frequency (the number of sound waves per unit of time).

Thirty-four normal-hearing and 18 cochlear-implant subjects participated in the study. They were tested on three speech-perception tasks known to be notoriously difficult for cochlear-implant users: speech recognition with a competing voice, speaker recognition and Mandarin-tone recognition. The researchers tested the amplitude modulation (AM) and FM from a number of frequency bands in speech sounds and tested the relative contributions to speech recognition in acoustic and electric hearing.

They found that AM works well in quiet environments but less well where background noise is present. In turn, FM enhances speech, tone and speaker recognition when other noise was present, and overall provided a better quality of tonal sound than AM does. Current cochlear implants extract only AM information, limiting significantly their performance under realistic listening situations.

These FM modifications, Zeng adds, can particularly assist Asians and Africans who speak tonal languages, such as Mandarin, in which tonal variations are vitally important. "As with your radio, music sounds better on the FM dial, and enhancing the FM reception on hearing devices can go a long way to helping people listen to and enjoy the beautiful music of their everyday lives in ways they've been unable to do," Zeng said.

###

Kaibo Nie, Ginger S. Stickney, Ying-Yee Kong, Michael Vongphoe and Ashish Bhargave of UCI and Chaogang Wei and Keli Cao of the Peking Union Medical College Hospital assisted with the study. The National Institutes of Health and the Chinese National Natural Science Foundation provided support.


Story Source:

The above story is based on materials provided by University Of California - Irvine. Note: Materials may be edited for content and length.


Cite This Page:

University Of California - Irvine. "Hearing Aid Signal Not Clear? Then Switch Frequency To FM, Finds UCI Study." ScienceDaily. ScienceDaily, 8 February 2005. <www.sciencedaily.com/releases/2005/02/050205131113.htm>.
University Of California - Irvine. (2005, February 8). Hearing Aid Signal Not Clear? Then Switch Frequency To FM, Finds UCI Study. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2005/02/050205131113.htm
University Of California - Irvine. "Hearing Aid Signal Not Clear? Then Switch Frequency To FM, Finds UCI Study." ScienceDaily. www.sciencedaily.com/releases/2005/02/050205131113.htm (accessed July 31, 2014).

Share This




More Mind & Brain News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Dieting At A Young Age Might Lead To Harmful Health Habits

Dieting At A Young Age Might Lead To Harmful Health Habits

Newsy (July 30, 2014) Researchers say women who diet at a young age are at greater risk of developing harmful health habits, including eating disorders and alcohol abuse. Video provided by Newsy
Powered by NewsLook.com
It's Not Just Facebook: OKCupid Experiments With Users Too

It's Not Just Facebook: OKCupid Experiments With Users Too

Newsy (July 29, 2014) If you've been looking for love online, there's a chance somebody has been looking at how you're looking. Video provided by Newsy
Powered by NewsLook.com
How Your Face Can Leave A Good Or Bad First Impression

How Your Face Can Leave A Good Or Bad First Impression

Newsy (July 29, 2014) Researchers have found certain facial features can make us seem more attractive or trustworthy. Video provided by Newsy
Powered by NewsLook.com
Losing Sleep Leaves You Vulnerable To 'False Memories'

Losing Sleep Leaves You Vulnerable To 'False Memories'

Newsy (July 27, 2014) A new study shows sleep deprivation can make it harder for people to remember specific details of an event. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins