Disclaimer: This is general health information only and is not a substitute for advice from your GP or healthcare professional.
1. What is sensorineural hearing loss (SNHL)?
Sensorineural hearing loss is a type of permanent hearing loss caused by damage to the inner ear (cochlea) or the auditory nerve pathways that transmit sound signals to the brain. It affects the ability to detect sound clarity and volume, particularly high-frequency sounds.
2. What causes SNHL?
Common causes include ageing, prolonged exposure to loud noise, viral infections, genetic factors, head trauma, certain medications that are toxic to the ear, and inner ear disorders. In some cases, the exact cause cannot be identified.
3. What are the typical symptoms of SNHL?
Symptoms often include difficulty hearing conversations, especially in noisy environments, frequently asking others to repeat themselves, turning up the television volume, and perceiving speech as muffled or unclear. Some individuals may also experience tinnitus, which is a ringing or buzzing sound in the ears.
4. Is sensorineural hearing loss permanent?
In most cases, SNHL is permanent because the hair cells in the inner ear do not regenerate. However, early treatment may improve outcomes in certain situations, such as sudden sensorineural hearing loss, which requires urgent medical attention.
5. What is sudden sensorineural hearing loss?
Sudden sensorineural hearing loss is a rapid loss of hearing, typically in one ear, occurring over hours to a few days. It is considered a medical emergency and often requires prompt treatment with corticosteroids to improve the chance of hearing recovery.
6. How is SNHL diagnosed?
Diagnosis involves a detailed history, ear examination, and formal hearing tests performed by an audiologist. Pure-tone audiometry helps determine the degree and pattern of hearing loss. In some cases, imaging studies such as MRI may be recommended to exclude structural causes.
7. How is SNHL treated?
Although permanent damage cannot usually be reversed, hearing aids can significantly improve hearing and communication. In cases of severe or profound hearing loss, cochlear implants may be considered. Management also includes addressing underlying causes where possible.
8. Can children develop SNHL?
Yes, children can be born with sensorineural hearing loss or acquire it due to infections, genetic conditions, or complications during pregnancy or birth. Early detection through newborn hearing screening is essential for language and speech development.
9. How can SNHL affect daily life?
Untreated hearing loss can lead to communication difficulties, social withdrawal, reduced academic or work performance, and emotional distress. In older adults, it is also associated with increased risk of cognitive decline.
10. Can sensorineural hearing loss be prevented?
Prevention strategies include protecting ears from loud noise, using appropriate hearing protection in noisy environments, avoiding unnecessary exposure to ototoxic medications, and seeking prompt medical attention for ear-related symptoms. Early intervention and regular hearing checks are important for maintaining quality of life.