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Why Do We Sound Different Through a Microphone?

You've spent hours writing quality comedic YouTube material and perfecting your delivery, but when you finally watch your masterpiece, your voice doesn't sound deep and smooth like you'd expected. Instead, you sound like a whiny, pubescent goob. What's the deal?

PopSci.com recently asked Vanderbilt University audiology professor why a person's recorded voice sounds different than what they hear when they speak. He attributes the perceived sound of a person's voice to throat, skin, and skull vibrations. Those vibrations mixed with sound waves (called bone conduction) create a "deeper, more dignified," lower frequency pitch than what others hear. Microphones and recorders don't convey those vibrations either, because they only register sound through air conduction.

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Audio/Video, iPod

Teens Crank the Volume When Asked to Turn It Down

Teens Crank the Volume when Asked to Turn it Down
We've covered surveys in the past that indicate teens don't care much about their hearing. Apparently, they'd rather have their tunes at the volume they want and deal with the repercussions later than turn the music down (and potentially avoid a decidedly unstylish hearing aid in the future). If you needed any more proof of the kids' aversion to quiet, there's a new study that demonstrates the trend, curiously showing that those most conscious of the potential hearing damage are those who are listening the loudest.

The study of 29 teens was conducted in Denver, Colorado by Cory Portnuff, a Colorado University doctoral candidate. Portnuff found indications that teens believe louder music equates to better quality sound, and that up to 24-percent of them listen to their players at dangerous levels. They seemed to be well aware of the issues associated with loud music and the damage they were causing, but kept the volume cranked anyway. Maybe that's why Apple is looking to automatically ramp down the volume in future iterations of the iPod. We'd hate to see that become a reality, but given these study findings, it's beginning to sound like a good idea. [From: ColoradoDaily.com]

Are you worried about iPod-related hearing loss?



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Golfers at Risk of Going Deaf?

Clubs 3

Golf is not considered a dangerous game. If anything, it is the sport over-protective mothers make their children play so they never get hurt. Those moms may want to re-think that strategy after they read this...

Experts are warning that thin-faced titanium drivers, those popular behemoths that give you an extra 1000 yards off the tee, may actually make the user go deaf. The drivers are so powerful that they actually create a mini sonic boom when they make contact with the poor, defenseless, little white ball. One 55 year-old man is believed to have damaged his hearing after using one of the clubs frequently over an 18-month span.

Earplugs are suggested for repeat users, but don't forget to take the plugs out after your tee shot -- you don't want to miss that "fore!" call from the group behind you!

Swing safely, world. [From: DailyMail]

Audio/Video, Portable Audio, CES 2008

Earphones That You Can Use All Day Without Damaging Your Ears





As with everything in life, there's good news and there's bad news. The good news is that we've found some headphones that will keep you, your hearing and your social life safe when using them. We stumbled across The Air Drives Interactive Earphones in the sea of gadgetry and tricky tech publicists at this year's CES in Las Vegas. To be honest, at first we were just humoring the friendly Air Drives fella peddling his product, but when we slipped them on and pressed play we were instantly sold.

The unique earphones went on Bluetooth style, with the speakers basically hovering outside the ears. When the jolly man played the music, the strangest thing happened: We felt like the music was being piped in from a PA system rather than being blasted inside our head, as with most earphones. Then, the Air Drives rep started talking, and we could hear both him and the music easily and clearly! It turns out that wearing these earphones doesn't mean you have to miss the phone ringing or risk getting flattened by cars you couldn't hear while out jogging to some music. Even more importantly, never again will you have to do that extra loud and obnoxious "Huh?!" thing when people talk to you.

Also, taking advantage of the Air Drive innovation's InAir Technology (We'd explain, but it's not bedtime yet.) allows you to listen to music any way you wish without offering your ears as sacrifice to the gods. In fact, the headphones are so safe, they exceed the House Ear Institute and Occupational Safety & Health Administration (OSHA) standards for all day listening and have earned a hearty endorsement from the International Association for the Hearing Challenged (IAHC).

Now for the bad news... The days of living in your own music world while the soundtrack to your life haughtily mutes the people around you just may be over. Sorry, but no more convenient excuses about not being able to hear the annoying request by your spouse, mother or father. But hey, it just might be worth it. You decide, but make sure you check out the gallery below for shots of the Air Drives in action first.



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Audio/Video, iPod

Future iPods Will Shut Down if You've Been Listening Too Long

Apple Patents Automatic Volume Leveler for iPod

We've reported before on the possible negative effects of gadgets on hearing, and everyone should know at this point that listening to your iPod for too long with the volume cranked more or less guarantees you'll be rocking some sort of hearing aid in your later years. Now it seems Apple's taking steps to prevent that, securing a patent that will automatically decrease the volume on devices (presumably future iPods) after a period of time.

The patent describes a technique for monitoring the volume levels that you use to listen to your music. Listen for too long at a volume the software thinks is too loud and your iPod could automatically force you to have some "quiet time" to let your ears recover. This sounds a little irritating, like the digital equivalent of a speed limiter on a sports car. But, don't fret just yet. It's unknown whether this would be an optional thing or whether it would be mandated on all of Apple's music playing devices. It's also possible this is just intended as an alternative to the restrictions Apple currently places on European iPods, limiting the volume there due to European consumer-protection laws. If that's the case this would actually be an improvement.

It'll probably be at least a year before we start seeing this "feature" on any iPods, so we'll all have to wait and see.

From Digg and Valleywag

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Cell Phones

Cell Phone Use Causes Hearing Loss, Study Finds

Cell Phones and Hearing Loss
A disconcerting report, released this morning from researchers at the Post Graduate Institute of Medical Education and Research in Chandigarh, India, revealed that people who talk on a cell phone for more than an hour a day were found to have suffered losses of high-frequency hearing. While that may not sound so bad, such hearing loss actually results in an inability to hear consonants like F and T, giving a whole new spin to the phrase "Can you hear me now?"

The team of researchers caution that "[their] intention is not to scare the public" and "there is as yet no cause for alarm." They also don't give any explanation of why a cell phone is any more dangerous for hearing than a traditional headset. But, if you're a heavy cell phone user and value your (or your children's) hearing, you might want to think about laying off the babbling a bit.

From textually.org

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Audio, iPod

American Eardrums Under Attack

With Sanjaya Malakar no longer the force he once was, it seems the tender eardrums of America's youth are once again safe from unnecessary harm. But sadly, that's not the case, reports NPR.

Today's 'Morning Edition' broadcast spotlighted Dr. Sharon Kujawa of the Massachusetts Eye and Ear Infirmary and her crusade across Boston's school system to inform young people about the dangers of listening to music too loud.

A study by the CDC estimates that 12.5 percent of American kids between six and 19 years-old show signs of noise-induced hearing loss. That's more than five million nationwide. However, what's particularly alarming is the fact that the study is from 2001 -- years before iPods and other digital media players were as commonplace as they are in 2007.

But, kids are a tough audience to win over. So, to help her get the message across, Kujawa travels with Ben Jackson, a twenty-something kid who gets up and actually raps a song about hearing loss. His song is called "Turn it to the left," and encourages youngsters to turn their volume dials down (and to the left). According to NPR, the kiddies go nuts for it.

Jackson's diddy goes a little something like this:

"The number one risk around,

Is when the volume goes up when it should go down,

So be aware of the sounds that you're listenin' to,

And when it gets too loud, you know what to do:

Turn it to the left, turn, turn it to the left..."

Admit it. You're dying to listen for yourself (halfway down the page).

From NPR

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