Hearing is a complex sense involving both the ear's ability to detect sounds and the brain's ability to interpret those sounds, such as speech or music. Hearing loss is a sudden or gradual decrease in how well you can hear. It is one of the most common conditions affecting older adults. Hearing loss may be caused by noise, aging, disease, or heredity. Hearing impairment is the third most commonly reported chronic problem affecting older adults. Approximately one in three people between the ages of 65 and 74 has hearing loss and nearly half of those older than 75 have difficulty hearing. Men usually experience greater hearing loss and have earlier onset compared with women. Having trouble hearing can make it hard to understand and follow a doctor's advice, to respond to warnings, and to hear doorbells and alarms. It can also affect socializing with friends and family difficult. All of this can be frustrating, embarrassing, and even dangerous. Age-related hearing loss can also be caused by some chronic conditions such as diabetes and poor blood circulation, as well as environmental exposures like loud noises, use of certain medications, family history of hearing loss and smoking.