Amit Sahni is an Audiologist I consulted recently, together with my wife because of our increasing deafness. We found him
While nearly 1 out of 5 Australians live with hearing loss, it remains a poorly understood. Left untreated, hearing loss can lead to a range of social and physiological problems, which include: decreased workplace effectiveness and income; withdrawing from noisy social situations; feelings of isolation; and strain on personal relationships. Scientists have also documented strong links between hearing loss and conditions such as heart disease and dementia. On this page we will examine some of the signs of hearing loss, types of hearing loss and causes of the condition.
Signs of hearing loss
While most people believe that hearing loss is an overall loss of volume, for most people this is not the case. As hearing los progresses, it commonly affects different frequencies (pitch) of sound by varying degrees. So while someone with hearing loss can hear someone talking, they actually miss parts of words and conversations.
For this reason, people with hearing loss may be of the belief that: – “I can hear ok, it is just that it is not always clear what someone has said”
This problem is really highlighted in the presence of background noise. Here are some other strong clues to hearing loss: –
- Following conversations in a noisy environment, such as a busy restaurant, can be very difficult
- I find myself asking people to repeat themselves because I did not quite catch what they said
- Others comment that I have the radio or television turned up quite/very loud
- If I did not see the source of a sound, I find it hard to know what direction it came from
- Family members comment that they think that I may have a hearing problem
- Following conversations on the telephone is difficult, particularly with women or children
- I experience a persistent or prolonged ‘ringing in my ears’ (known as tinnitus)
- Driving with the indicator light turned on
- Not hearing the chirping of birds as much as you use to (yes, they are still everwhere)
If you experience any of these symptoms, we strongly recommend that you contact our specialists to arrange a free hearing check and consultation.
You may also like to take our free 1-minute online hearing tests, which have been developed to help people objectively assess their level of hearing health.
Types of hearing loss
The three forms of hearing loss are Conductive, Sensorineural and Mixed hearing loss.
Conductive Hearing Losses
Conductive hearing losses result from an issue with the passage of sound through the outer and middle ear and common causes include: –
- Excessive build up of wax in the ear canal
- Damage or tears in the eardrum
- Fluid build up in the middle ear caused by illness or infection
While many people put their hearing difficulties down to “just have a build up of wax”, only 10% of hearing losses are conductive in nature.
A conductive hearing loss feels like the volume of the world has been turned down, but the clarity is still there. Symptoms may include: –
- Hearing in one ear better than the other
- Pain or pressure in the ear from fluid build up behind the ear
Conductive hearing loss is often treatable and causes mild to moderate in severity. In most cases, hearing is restored after the treatment.
Sensioneural Hearing Loss
The overwhelming majority of cases of hearing loss are sensorineural in nature. Originating in the inner ear, sensorineural hearing loss occurs due to damaged hair cells or nerves within the cochlea.
Sensorineural losses are commonly treated through the use of hearing aids or cochlear implants to correct the hearing.
There are a wide variety of reasons for this kind of loss including:
- Genetic predisposition
- Excessive noise exposure, both sudden and over time
- Ageing process
- Side effects of medicine
- Auditory nerve tumors
- Birth defects
- Infections such as meningitis and mumps
- Kidney disease
- Heart disease
Once damage, the hair cells (nerve endings) within the cochlea cannot repair themselves or be medically treated – therefore over 90% of cases of sensorineural hearing losses have no “cure”. Nevertheless, the use of hearing aids is of great benefit to people with sensorineural hearing loss.
Mixed Hearing Loss
As you may suspect, this is where a person has a combination of sensorineural and conductive hearing loss. For example, someone with inner ear damage due to long-term exposure to noise in his or her workplace could also be suffering a cold that has led to fluid build up in the ear canal.
Many people suffer from a frustrating condition called Tinnitus, which is often related to hearing loss. Click here to learn more about tinnitus and the treatments available.
Causes of hearing loss
While age is certainly a factor in the development and severity of hearing loss, more than half of people in Australia who suffer from the condition are less than 65-years of age.
Studies and statistics have show that around 37 percent cases are due, at least in part, to long-term exposure to noise either through working conditions or lifestyle choices. This highlights the need for people to adopt hearing protection (such as custom fitted earplugs) when working in noisy environments.
The statistics also show other causes like, infection or injury at 17%, birth or antenatal loss at 4.4% and all the other causes contribute to 16.8% of hearing losses.
Why can I hear low-pitched sounds better than high-pitched sounds?
Nerves have different sensitivities to deformation of the sensory hair cells within the cochlea. A sound that has high frequencies of vibration will excite receptor cells near the opening of the cochlea, while a sound mostly containing low frequencies will stimulate cells at the end of the cochlea.
Over time the high frequency hair cell receptors receive more movement by the incoming pressure waves of the fluid inside the cochlea. For this reason, high frequency receptors are more prone to long-term damage than the low frequency hair cell receptors, which are more protected further up the cochlea.
Book a free hearing check today
If you believe that you may be experiencing the symptoms of hearing loss contact our specialists , it is important to do something about it as soon as possible. The brain’s ability to process sound will continue to diminish the longer that it made to go without stimulation, and this can lead to reduced effectiveness of treatments when people come to take steps to addressing their hearing loss.
Additionally, it is important to take steps to prevent the potential social and physiological affects of the condition. Call us or click here to make an appointment for a free hearing check.