Many traditional Fourth of July festivities can reach potentially dangerous noise levels. Fireworks and firecrackers can be as loud as 150 decibels—louder than a jackhammer or jet plane takeoff. Safe listening levels are generally 75–80 decibels.
The researchers found that people who exhibited higher RNT patterns experienced more cognitive decline over a four-year period, and declines in memory (which is among the earlier signs of Alzheimer’s disease), and they were more likely to have amyloid and tau deposits in their brain.
Dr McSpaden was an influential author, educator, clinician, and lecturer in audiology for over four decades, and helped develop training materials that are still widely used in the profession. He was 79.
The Acoustics Sub-Working Group for the International Space Station, led by co-chairs Dick Danielson and Chris Allen, wins the innovation award for identifying the unique risk facing crew-members and developing solutions for reducing noise exposure.