Sensorineural Hearing Loss

Author thumbnail Laura James  |  Published 21 August 2024  | 6 mins read

Audiologist examining a patient's ear with an otoscope, focusing on the ear canal and eardrum.

Many people experience hearing loss as they age, but ageing isn’t the only cause. Sensorineural hearing loss is the most common type of hearing loss and can happen at any age for a multitude of reasons. Read on to learn more about sensorineural hearing loss, its common causes, and how it’s treated. 

What is sensorineural hearing loss?

Sensorineural hearing loss (SNHL), also known as nerve-related hearing loss, occurs when the hair cells inside the inner ear or the hearing nerve (or both) are damaged. It is the most common of the three types of hearing loss (the other two are conductive hearing loss and mixed hearing loss) and is often permanent.

There are two types of SNHL: congenital and acquired. Congenital hearing loss occurs at birth, either due to genetics or during the foetal development stages. Acquired hearing loss occurs after birth and can be caused by various factors. Early detection is vital to ensure as much hearing quality is preserved as possible. 

Types of sensorineural hearing loss

There are multiple different types of SNHL. Depending on the cause, it can affect one ear or both in varying degrees.

Bilateral sensorineural hearing loss

Bilateral SNHL affects both ears. It can be caused by genetics, exposure to loud sounds, and certain diseases such as measles, as well as ageing.

Unilateral sensorineural hearing loss

Unilateral SNHL usually only affects one ear and can happen naturally, although is much less common. It’s commonly caused by a tumour, Meniere’s disease, or a sudden loud noise in just one ear.

Asymmetrical sensorineural hearing loss

Asymmetrical SNHL is hearing loss that affects both ears, but one ear is worse than the other.

The main signs of sensorineural hearing loss

It can be difficult to identify the symptoms of SNHL which is why it’s so important to familiarise yourself with the signs of hearing loss. If you identify any of the following symptoms, make sure to book a hearing test.

Noisy icon depicting an ear surrounded by sound waves.

1. Difficulty understanding speech or following conversations, especially in noisy environments.

Conversation icon featuring a speech bubble with a question mark, symbolizing inquiry and dialogue.

2. Frequently asking others to repeat themselves.

Low volume icon depicting a speaker with sound level low, symbolizing reduced audio output.

3. Perceiving speech and other sounds as muffled or mumbling.

Do not hear icon featuring an ear with a crossed-out symbol, indicating hearing impairment or inability to hear.

4. Trouble hearing high-pitched sounds such as timers, alarms, or some voices.

Tinnitus icon representing ringing or buzzing sounds in the ears, symbolizing the condition of tinnitus.

5. Tinnitus – a ringing or buzzing in your ears.

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Book Your Free Service

If you’re considering a hearing check, try our online hearing test. While this test is available anytime, please remember it cannot provide a medical diagnosis.

For a thorough and precise evaluation, schedule a free hearing assessment with our professional audiologists. Regular hearing tests can identify changes in your hearing early, enabling timely treatment or management. To book an appointment, call us at 0800 52 00 546 or click below to book online.

What causes sensorineural hearing loss?

Sensorineural hearing loss can be caused by many different things, from trauma to disease. The most common causes of SNHL include:

  • Ageing (presbycusis)
  • Exposure to loud noises – including explosions, repeated loud concerts or machinery
  • Genetic factors
  • Ototoxic medications
  • Head trauma
  • Diseases such as Meniere’s disease
  • Infections such as measles or meningitis. 

How is sensorineural hearing loss treated?

The treatments of SNHL will depend on the cause and severity of the hearing loss. It is not treatable through surgery or medication and will often need an external tool to help give you a full spectrum of hearing again. Alternatively, if a medication causes it, the effects can be reversed if treated withing 48 hours with steroids – this is why it’s important to seek immediate medical attention for sudden hearing loss.

It’s important to seek treatment for sensorineural hearing loss as soon as possible. Leaving it untreated can make life more difficult and negatively impact your well-being as it can decrease your quality of life and cause you to feel lonely.

  • Hearing aids – the most common treatment options for SNHL. Modern hearing aids can match specific hearing loss symptoms to help you hear better. For example, for problems hearing high-frequency sounds, hearing aids can help enhance these sounds, giving you a more rounded hearing experience. 
  • Cochlear implants – a device that can be surgically implemented to help with severe SNHL. They consist of two parts, a microphone you wear behind your ear and a receiver inside your ear that sends electrical information to your auditory nerve.
  • Assistive listening devices – These are tools used to help people with hearing loss communicate and access the world by amplifying sounds and providing visual or tactile alerts. These can include hearing loops (devices that amplify sound from a specific source and send it directly to the ears) and alerting devices such as vibrating alarm clocks or light-up doorbell alarms. 
  • Auditory training and rehabilitation – Training courses designed to assist people with hearing loss by improving their listening skills and speech understanding.

Can sensorineural hearing loss be prevented?

Once someone develops SNHL, it can not be cured (except in some cases related to medications as highlighted in the last section). Due to the nature of the condition being related to permanent damage. However, there are measures you can take to prevent it from developing later in life.

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  • Wear proper ear protection – When working with loud machinery, loud environments, or attending concerts, wearing earplugs or earmuffs will help to minimise the damage done to your ears.
  • Keep your headphone volume under 60 percent – repetitive long term use of too-loud headphones can cause irreparable damage to your hearing. 
  • Avoiding ototoxic medications where possible – some medications such as certain antibiotics, NSAIDs (nonsteroidal anti inflammatory drugs), and chemotherapy drugs can cause irreversible damage to your hearing. 
An audiologist performing a hearing assessment on a patient.
  • Maintain good cardiovascular health – Having a healthy heart can improve blood flow. Inadequate blood flow and trauma to the blood vessels of the inner ear can contribute to hearing loss.
  • Control any health conditions – If you have any health conditions like diabetes, ensure you control it well to minimise any potential nerve damage that can affect your hearing.
  • Attend regular hearing check-ups – Regular hearing check-ups will help to catch any issues early. Book in for your free hearing assessment with The Hearing Care Partnership.

Key Takeaway

Sensorineural hearing loss is the most common type of hearing loss. It can be caused by many different things – from genetics to age to trauma – and happens when the hair cells or auditory nerve become damaged.  While sensorineural hearing loss is usually permanent, most people with it can regain their quality of life through the use of hearing aids, cochlear implants, and assistive listening devices. 

If you suspect you or a loved one has hearing loss, or if you experience a sudden loss of hearing in one or both of your ears, seek medical attention or reach out to your audiologist for a hearing assessment.