There is a problem with headphone jack or amplifier of your audio player or the Control Talk feature of the headphones that allow them to be used as a microphone on iPhones.
And sometimes when your laptop is plugged to its charger- it does the same thing.
No not even close. Sennheisers can quite easily blow beats out of the water. Also using "in the world" means you include the 100k+ headphones that 1 person buys that are pretty much speakers bound together with metal.
To avoid hearing damage, make sure that the volume on your music player is turned down before connecting your headphones. After placing headphones in your ears, gradually turn up the volume until you reach a comfortable listening level.
Noise levels are measured in decibels (dB), exposure to any noise at or above 85 dB can cause gradual hearing loss.
Monitor your use; hearing loss is a function of loudness versus time. The louder it is, the less time you can be exposed to it. The softer it is, the more time you can listen to it. Refer to the chart* below.
This decibel (dB) table compares some common sounds and shows how they rank in potential harm to hearing.SoundNoise Level (dB)EffectWhisper30Very quietQuiet Office50-60Comfortable hearing levels are under 60 dBVacuum Cleaner, Hair Dryer70Intrusive; interferes with telephone conversationsFood Blender85-9085 dB is the level at which hearing damage (8 hrs.) beginsGarbage Truck, Cement Mixer100No more than 15 minutes of unprotected exposure recommended for sounds between 90-100 dBPower Saw, Drill/Jackhammer110Regular exposure to sound over 100 dB of more than 1 minute risks permanent hearing lossRock Concerts (varies)110-140Threshold of pain begins around 125dB"....a typical person can safely listen to an iPod for 4.6 hours per day at 70% volume."
"....knowing the levels one is listening to music at, and for how long is extremely important."
32 ohm Audio
6th Avenue Electronics
8th Street Music
Abe's of Maine
Abt Electronics
Airport Wireless
Amazon
American TV
Apple
B&H Photo-Video
Barnes & Noble
Beach Camera
Beats By Dre
Best Buy
Bjorn's
Bobizzo.com
BrandsMart USA
Bravado International Group
Champs Sports
Cowboy Maloney's Electric City
Crutchfield
Dell
DXC
Earphone Solutions
Electronic Express
Electronics Expo
Elyse Walker (selling in-store only)
f.y.e
Fry's Electronics
Headphone Solutions
Headphones.com
Headroom
HH Gregg
Hot Topic
HSN
InMotion Entertainment
J&R Music and Computer World
ListenUp
Micro Center
Monster Cable
Moon Audio (selling in-store only)
Newegg
OfficeMax
OneCall
PC Richard & Son
Radio Shack
Sam Ash Music
Sonic Electronix
Sound Earphones
Staples
Sweetwater
Target
Tech Showcase
Ultimate Electronics
Unique Squared
Vanns
Walmart
Wild West Electronics
Wireless Zone
World Wide Stereo
Your Electronic Warehouse
It is literally called 'Beats By Dr. Dre' as Dre set it up.