The popular headphone design may damage hearing.

Hearing and the Human Ear - Exit Ticket

Hearing and the Human Ear - Student Presentation 

Hearing and the Human Ear - Teaching Presentation 

Sinusoidal wave going trough entire human audio spectrum, starting at 20Hz and ending at 20kHz. Note that the frequency increases exponentially, the idea was to increase the frequency by constant fraction of currently played frequency rather than by a constant value (which would result in clearly noticeable fast change at lower frequencies and nearly no change at higher frequencies). Enjoy.

Note: This wave has the same volume level measured by acoustic pressure all the time, however human sound perception differs depending on frequency. For lower frequencies (below 1kHz) you might want to increase your volume, but don't forget to lower it later to avoid damage to your hearing. 

If you don't hear anything below 40-50Hz even at full volume your audio hardware is probably incapable of playing lowest frequencies. You might want to try to listen on the headphones in such case. Also if you stop hearing sound somewhere between 10kHz - 20kHz - do not increase your volume for safety reasons. Every human hears a bit differently and have different hearing thresholds. Hearing range also changes with age. Younger people can usually hear higher frequencies.

For HD (High Definition) version of this test, which might yield better audio quality see: http://www.youtube.com/watch?v=H-iCZElJ8m0

20Hz to 20kHz (Human Audio Spectrum)

*MUST WATCH IN 1080p AND USE HEADPHONES*
How high can you hear? Take this 'test' to see how old your ears are!
SUBSCRIBE (it's free!): http://bit.ly/10kWnZ7
NOTE: The 19,000 Hz frequency has been lost due to YouTube compressing the file.

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Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz).

How Old Are Your Ears? (Hearing Test)

Hearing loss in kids because of headphones

I thought I would mention that now that I've had tinnitus for a few years, I can say that as time has gone on, it's become less of a problem for me. I've gotten used to it by now, though I always have to make sure to be aware of the sound levels in my surroundings so that it doesn't get worse.

This is the closest I could get to replicating the sound of my tinnitus.

Tinnitus is a ringing in your ears or head and often does not go away, ever. I got it from going to a concert (And it's the only one I've ever been to) and was right by the amp. I didn't know about tinnitus until a few days later when the ringing didn't go away and I was told it was tinnitus. Why am I telling you this? So you know to wear earplugs whenever you go to concerts so you don't end up with tinnitus like I did. I found out that mine will most-likely be permanent, so I know that if I knew about tinnitus then I would have taken safety precautions, so I figure I'll let you guys all know since I know that I would have liked to know about tinnitus before hand. There are other ways to get tinnitus, but this is the most common, and is often untreatable other than trying to use other noises to drown out the sound of the tinnitus.

The main problem with having tinnitus from my experiences are that trying to get some sleep is like going through hell.

Edit: As an update, it's been 6 years since I got tinnitus, and it's a lot more manageable for me now. It's not nearly as loud as it used to be, and I hardly notice it now. I just make sure to not listen to music too loud and I keep earplugs with me everywhere I go in case there's a loud noise such as a fire drill that I can't get away from.

What tinnitus sounds like

This is an example of what various types of hearing loss sound like to the individual with the loss.  I had been looking for something like this that would give me an idea of what my son's hearing loss is like (moderate).  This is a great tool for parents looking to relate to their child's loss.  House Research Institute produced this excellent video. 

Their website is:  www.hei.org

Hearing Loss Example (produced by House Research Institute)

Visit http://ilectureonline.com for more math and science lectures!

In this video I will show you how to calculate I=? at distances of 25m and power is 20W.

Physics 20  Sound and Sound Waves (14 of 49) Sound Intensity at a Distance

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in this video, we demonstrate as we teach a Nurse Practitioner student how to remove wax from an ear using the elephant ear device.

Watch all the way to the end for a case discussion with clinical implications of this cerumen impaction.

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GIANT EAR WAX REMOVAL | Dr. ER

Learn how sounds make their way from the source to your brain. To learn more about how we hear, visit the National Institute on Deafness and Other Communication Disorders at https://www.nidcd.nih.gov.

A Spanish language version of this video is available at https://youtu.be/jAc8A5NhJKk.

Journey of Sound to the Brain

Hearing and the Human Ear - Student Lesson Outline 

Hearing and the Human Ear is a lesson by Teach Science with Fergy, containing engaging videos, presentations and activities to help develop students' science knowledge.

Can Earbuds Lead to Hearing Loss?

Science Resource Description