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iPhone Interface Breakdown

A Breakdown of the iPhone's Interfaces

By Chris Adams, About.com

Apple has touted the iPhone as a break through in mobile communication. An all-in-one device with fantastic ergonomics that makes any task you perform efficient and engaging. But does it live up to those promises? Here's a breakdown of all the iPhone human-machine interfaces and what they mean to your usability of this multi-function cell phone/communicator.

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1. iPhone Body

The iPhone has a good size, a good heft and a good skin.

The form factor fills up your hand but isn't too large for a pocket. It is rather thin which helps it fit wherever you want to put it and gives it its sleek proportions.

The iPhone does have some weight to it, but that is a positive thing. It is not heavy; it just has the weight of quality material. The added weight gives you tactile feedback that you actually have a hold of your cell phone giving you more physical control and assurance when operating it.

The shell or skin of the iPhone is tough and has a slight grip to it.

2. Home Button

The home button is the only prominent physical button. It resides at the bottom of the iPhone all by its lonesome. It can be easily activated by a thumb or finger and has good tactile feedback. It can wake the iPhone from sleep mode, but its primary purpose is to takes you to the home screen.

By having a home screen for all the applications and a button dedicated to it, you don't have to worry about reverse navigation. You have reverse navigation (the back button) within the application if you need it, but for the most part you will progress linearly to your destination then just jump to the home and go to your net place. No need to back out of the application or confuse the interface with more buttons.

3. Wake/Sleep Button

At the right of the top of the iPhone sits the wake/sleep button. It is a thin, unobtrusive button. It takes a fair amount of pressure to activate it. That combined with the unobtrusiveness makes accidental activation less likely. It also provides good tactile feedback.

The wake/sleep button has two primary purposes, to put the iPhone into sleep mode instantly and wake it from sleep mode. You can also press it twice to send an incoming call straight to voice mail, a useful function that can be accomplished just by touch.

4. Silence Ringer Button

The silence ringer button is a two-position slider button on the top of the left side of the iPhone. It simply turns the speaker sound off and on. It doesn't affect sound through the headphones or vibration.

There is a positive indication when the button's position has been changed. It snaps into place. It also vibrates when the ringer is turned off (in case you forgot what position it was in before). This button is also easy to use by touch alone.

5. Volume Rocker Button

Below the silence ringer button sits the volume rocker. This raises or lowers the speaker/headphone volume. It provides good tactile feedback as well as the auditory cue in the volume change.

6. Multi-touch Screen

The multi-touch screen is is gorgeous, crisp and bright. To navigate, you simply touch it. Different motions perform different actions per application. Control is enhanced by the multi-touch capability of the screen since more than one touch can be registered at once, making for interactive and engaging controls.

Typical iPhone controls include the flick, slide, drag, pinch and stretch. A flick of the finger is used to scroll through lists or change pages. Sliding brings up a delete button. Dragging is used to move web pages and photos around. Pinching and stretching with two fingers to zoom.

The screen itself is made out of glass and is extremely scratch-resistant. It does smudge, but you can see clearly through the buildup.

7. Headphones

Earbuds

The earbuds have good sound quality and fit in your ears well. They may become uncomfortable after extended wear. They do a decent job of blocking outside noise.

Microphone

There is a microphone on the headphone cord. Placing the earbuds in your ears registers the mic with your mouth for hands-free communication. It has adequate pick up for voice communication.

Mic Button

The microphone is also a multi-function button that you squeeze to activate. While in iPod mode, one click pauses the song and a double click advances to the next track. Clicking the button also answers or hangs up a call.

The mic button has good tactile feedback and is easy to double click.

8. Speaker Volume

The speaker is adequate in a relatively quite area. The volume is even sufficient when using the speaker phone in a car. But in a crowded environment you want a few more decibels. You might find yourself using some of the harsher ringtones to help alert you to incoming calls.

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