The above is an audiogram. Most deaf people have seen one of these before, but if you’re like me, you won’t have bothered to find out what they mean, other than ‘You are deaf. You are very, very, very deaf.’
From left to right, the audiogram is arranged like the keys on a piano, with low frequencies on the left and higher frequencies on the right.
From top to bottom is a measure of volume, in decibels.
Most people are born with perfect hearing. At the age of 18, your hearing is as good as it’s ever going to be. In fact, you’ll probably hear higher frequencies that people in their 30s and later in life can’t. As people age, they lose more and more hearing in the high frequency range.
Now, let’s look at the hearing that I was born with. My hearing has been more or less the same since I was born. I’m usually tested with a pair of headphones in a soundproofed room, using a cable with a button on the end which I press every time I hear a tone.
So… I’m in the ‘profoundly deaf’ range. Without hearing aids, I hear nothing. If I put my head underwater and hum loudly, I can hear that. If someone fired a .357 Magnum next to my head, I might hear it (more likely feel it, but more on that later).
I’ve worn hearing aids most of my life, with varying levels of success.
Just before the operation to have a bionic ear installed, I took a hearing test with both hearing aids in, sitting in front of speakers instead of wearing headphones.
As you can see, I get a substantial increase in volume… but going towards the higher frequencies, my hearing falls off a cliff. With hearing aids I’m getting all the low bass sounds, but hearing nothing in the higher frequencies, like smoke alarms, birdsong, the higher end of a cat’s meow, or the consonant sounds of speech.
My expectations were quite low when I went in last week for a hearing test, wearing my cochlear implant. My mum was in the room with me too. I could hear most of the sounds being played through the speakers, but as they played quieter and quieter sounds, I was less and less sure of what I heard.
Anyway – this was the audiogram.
I now hear all the frequencies of sound, at a volume which is just touching on the ‘normal’ range. My mum couldn’t hear many of the higher frequencies, so not only am I hearing much better than before, I’m hearing better than my mum!
According to my current settings, my cochlear implant is set at 75% microphone sensitivity, and at 85% internal volume. So there’s even a possibility that I’ll achieve better results in future listening tests.
On a purely technical and scientific level… the operation has been a complete and utter success. Like Jesse in Breaking Bad might say:
So why do I still feel so low? Probably because I now realise that it’s going to take me a long, long time before I can use that hearing to actually hear (by the way, for the avoidance of doubt, this is the original audiogram that the hospital gave me below).
I’ve had so many people contact me via the blog since I started writing, which has been fantastic. I’m trying to help them by answering their questions and concerns as best as I can. At the same time, I can’t help but compare myself against them. Take, for example, the chap who asked me lots of questions about the process before his switch on… and found that the same day he was switched on he could understand the audiologist’s speech without lipreading.
He was hearing until 18, then became profoundly deaf overnight. 20 years later, his implant seems to have almost instantly given him most of his hearing back. I’m happy for him, but as time goes on I understand more and more now why I’m a non-traditional candidate, and the hospital don’t like to implant ‘people like me’.
The big positive is that on paper, I seem to have pretty damn good hearing at last, after 35 years of having to deal with pretty limited input. I suppose what I’m scared of is never fully understanding or realising the potential of that increased hearing before I can really make use of it.
Further reading:
How to understand your hearing test
First published on William Mager’s blog. Check it out: http://wlmager.com/blog/
William Mager is an award-winning director for film and TV, who made his first film aged 14 when he “set fire to a model Audi Quattro and was subsequently banned from the school film club for excessive pyromania.” He’s made short films, dramas and mini-series, and works for the BBC. Find out all about his work at his personal website – and if you’re on Twitter, follow him here.
The Limping Chicken is the UK’s independent deaf news and deaf blogs website, laying eggs every weekday morning! Since February 2012 we have clocked up nearly 400,000 views and published over 70 deaf writers. Please take a moment to find out more about our supporters: Deaf media company Remark!, sign language communications agency Deaf Umbrella, provider of video interpreting services SignVideo, theatre captioning charity STAGETEXT, legal advice charity the RAD Deaf Law Centre, and Remote Captioning provider Bee Communications.
jill
February 5, 2013
You may be a non-traditional candidate but you are also unique, witty and write with a wonderful clarity, intelligence and honesty – we love reeading your blog. And – hey – it’s early days!
wmager
February 5, 2013
Haha – that’s very nice of you to say, Jill! Thanks very much.
barakta
February 5, 2013
This is a brilliant post, really nice and clear for people who don’t know all that much about deafness, hearing aids, cochlea implants etc.
Thanks for writing this and I hope you keep getting more and more out of your implant.
Robert Mandara
February 5, 2013
It’s wonderful to see your audiogram and it has almost inspired me to go for an implant!
As you have noticed, hearing the frequencies and understanding what you’re hearing are two different things. But give it time and I’m sure that, once you’re brain adjusts, you will be able to hear speech etc. that you have been able to before.
Musical Lottie
February 5, 2013
Oh, wow. No wonder CI implantees need time for their brains to adjust! Taking your audigrams alone, in terms of pure numbers you used to be interpreting sounds across a frequency range of c.2750Hz (as in, 250 to 3000). Now, you have access to an extra range of at least 5000Hz (3000 to 8000+) – although realistically it’s probably a much greater range as the CI no doubt picks up much higher frequencies than 8kHz! Add to that the fact that all these extra sounds were initially distorted, and your brain has had to unscramble the signal before even beginning to attempt to interpret it … and that’s not even factoring in the neurological changes required and all sorts of unknown processes going on there. So the fact that you are able to interpret anything at all from the sounds picked up by your CI is frankly astonishing – hats off to your brain! And hats off to the brains of all CI users 🙂