Hearing difficulties in older people linked to changes in the attention processes in the brain. Researchers recorded the alpha waves in the brain of 20- to 30-year-olds and 60- to 70-year-olds while they performed a hearing task.
The participants listened to two spoken numbers and had to press a button if the second number said was higher or lower than the first. The numbers were presented with background noise.
During the hearing test, the researchers manipulated the acoustic quality by removing certain frequencies from the speech signal. Research lead Malte Wöstmann said, “The voices then sound like artificially generated computer speech.”
The researchers also intentionally varied the predictability, meaning if the first number was very low there was a greater probability the second number was higher. With better predictability, participants were quicker at the activity, but the results changed once the acoustic quality altered. Older participants fared well with better acoustic quality.
The effect of acoustic quality for older participants was also reflected in the alpha waves. With improved speech quality, the alpha wave amplitude was much lower for older study subjects, implying that attention in elderly shifts to acoustic aspects of the speech signal.
Wöstmann concluded, “I am thinking here, for example, of the possibility of adapting hearing aids to the listener’s brain activity individually and dynamically in order to improve speech comprehension in challenging situations.”
If you’re over the age of 50, you don’t have to fall victim to losing your hearing. There are easy preventative measures you can try to ensure you preserve your hearing and avoid the side effects hearing loss can cause. Here’s what you can do for hearing loss prevention:
The Better Hearing Institute suggests that one third of hearing loss can be avoided with prevention strategies. Even if you think it’s too late or you’re too old, following these tips can help you preserve your hearing for many more years to come.