Portable Audio Tech info-gallery(56k Warning)

[evillamer]

Quote:

A new technique has been developed that provides adjustable damping without a screen. Ferrofluid, which is a stable suspension of minute magnetic particles (Fe3O4) in synthetic ester oil, was found to be an effective viscous damper during laboratory tests. The ferrofluid is injected into the gaps between the armature and the magnets in the receiver, where it is retained by the magnetic field (Figure 1).

Quote:

The fluid decreases the peaks in the acoustical output without affecting the mid-band SPL. The amount of damping can be adjusted over a wide range by selecting the appropriate fluid volume and viscosity. Figure 2 shows the frequency response curves of the ferrofluid damped FED and the traditional ED receivers under constant voltage drive conditions. Ferrofluid offers the advantage of screen damping without the problems associated with cerumen accumulation in the screen, because the screen is no longer necessary. In addition to damping, it protects the armature from shock damage and it reduces the maximum vibration output of the receiver.

http://www.hearingreview.com/issues/...2003-01_05.asp

 

[evillamer]

Quote:

Both the tweeter and woofer houses a transducer (not shown in FIG. 2A) that is designed, in general, to produce optimal sound quality within a given frequency band. Woofers are generally designed to produce low frequency sound and tweeters are generally designed for high frequency sound. The interior of an exemplary receiver encasing a transducer is shown in FIG. 2B below. Receiver 250 generally includes an outer casing 259 containing an armature 251 that drives a diaphragm 252 back and forth. The movement of diaphragm 252 compresses and decompresses the air inside encasement 259, creating sound waves. The sound waves propagate out of the receiver through outlet 253.

Apple Reveals Advanced Multi-Touch Technology, Cryptography & New Earbud System Patents - Patently Apple

 

[evillamer]

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[Junliang]

Wow, how long did you take to compile those info ?
Nice information

 

[evillamer]

Etymotic Research--How to Get a Proper Seal for the Best Sound (video)

Amazon.com : Entertainment : Etymotic Research--How to Get a Proper Seal for the Best Sound

Etymotic Research--The Science of Pure Music (video)
Amazon.com : Entertainment : Etymotic Research--The Science of Pure Music

 

[evillamer]

Quote:

Originally Posted by Junliang /img/forum/go_quote.gif Wow, how long did you take to compile those info ? Nice information

Mr google helped me alot.

 

[evillamer]

Quote:

The ATH-ANC3 noise-canceling headphones from Audio Technica feature active noise cancellation, which basically means that they use a built-in microphone to take an audio sample of surrounding ambient noise and they create the exact opposite noise to cancel the ambient noise out.

http://www.unplggd.com/unplggd/speak...dphones-060154

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Not safe for work, click to see

Don't click

 

[evillamer]

Custom Ear impressions(Yes, don't ask me why i chose this pic)

Quote:

Having your ear impressions taken is a painless and fairly quick procedure but should only be carried out by a qualified professional. Firstly your ears will be fully examined, this is done to make sure the ear canal is clear of cerumen (ear wax) and the inner ear looks healthy. A small foam block is placed in the ear canal to act as a seal to stop the silicon at a certain point on the journey into the ear canal. The impression can only now be taken by injecting a two-part silicon material into the ear with a special syringe. The silicon is left in the ear to cure for about five minutes and then removed: a very simple procedure. Once the impression has been taken and the audiologist is satisfied that the impression will produce a high quality custom fit, they will then be sent and processed in the ProGuard laboratory where the final product will be manufactured.

Snorestore and ProGuard Custom Ear Plugs

http://www.hearingreview.com/issues/...2006-05_10.asp

 

[evillamer]

HD800 expensive?! It's a bargain!

Quote:

collaboration between CrystalRoc & Audio Technica, this time its to produce the first ever commercial crystallized headphone. The Crystal PRO700 is covered with over 5000 individual Swarovski Crystals. Hope it sounds as good as it looks. Hit the jump for more looks.

http://www.iamfatterthanyou.com/blog/?p=12480

http://niac.jp/staff_blog/audio-technica_ontoniac.html

Take that Sony WalkMan!

http://www.crunchgear.com/2007/09/22...record-player/

Would you wear this?!

http://www.ubergizmo.com/15/archives...eadphones.html

 

[evillamer]

Sony MDR-888

AT CM7

B&O A8

 

[evillamer]

How they assemble headphones at Grado:

Grado Labs Facility Tour [audiojunkies]

 

[evillamer]

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[evillamer]

Comply™ Foam Replacement Tips/Earbuds for M-Audio IE-10

 

[evillamer]

Beyerdynamic T1 driver

 

[evillamer]

BTH 4000 Ohm Headphones From England circa 1924

Quote:

These are high quality 4000 ohm headphones from England made circa 1924, and in excellent condition, and work great with excellent sensitivity on crystal radio. They were high end headphones back then and have a nice real leather dark brown headband cover, and the housings and earcaps are the reddish brown bakelite

http://oldheadphones.com/crystal/phones/phones.htm