noise-cancelling headphones

These were pretty much the lowest priced "noise-cancelling" or "noise-reduction" headphones (with active circuitry) I could find for my trans-pacific flights. I didn't expect much out of them, but now feel I got well worth what I paid.

Noise reduction:

This is the first and only pair of noise-cancelling headphones I've ever used. I'm sure they don't even come close to the "legendary" Bose. Nevertheless, it still helps substantially when riding a jet. I can finally hear the in-flight movie dialogue comfortably without cranking up the volume all the way. Classical and jazz music becomes listenable, too. They also makes it much easier for me to relax or nap, even when not listening to anything. I ended up having them on all the time.

They do introduce some white noise (mid-to-high-range hiss) when noise cancelling is on. The over-the-ear design and noise-cancelling circuit combined is effective only to certain frequency range (Panasonic admits so on the package), meaning a crying baby will still be a crying baby. Jet engines, on the other hand, will be much more tolerable.

Comfortness:

I was able to wear them on trans-pacific flights all the time (except when dining, of course.) That was up to 14 hours non-stop! They sure feel nice to me. Nevertheless, no two persons' ears are of the same shape. Your mileage may vary. I wonder if they let you try headphones on in brick-and-mortar stores.

Conclusion:

If you pay five bucks on your flights for the crappy headphones that used to be free, think again. A very little investment may make your flights much enjoyable. As for hi-fi listening at home/work, better look elsewhere.

First of all, there is a hiss when the noise-cancellation feature is turned on in a quiet room.

2. It only reduces, and not cancels, external sounds in the lower mid-range. Bass sounds get through.

3. The noise reduction seems to work on the music being listened too; when it is on, the bass and the mid-lower range sounds "mushy," and there's a reduction in volume.

4. Headphone quality is not really that great.

5. The volume/AAA battery holder has an on-off switch, a volume control, a small indicator light and a max/normal noise cancellation switch. The noise-cancellation has no discernable function. I don't think it's even connected to anything!

6. It is comfortable and the "foldableness" of the headphones is good.

I plan to return these headphones and will go shopping for something maybe a little more expensive, but would actually reduce the noise without reducing the music quality.

I flew 14hrs from Chicago to Hong Kong with them, I flew regional propeller planes with them, I rode subway and bus with them, and I worked in a computer lab (with nowadays 3 whirling fans per computer) with them. They perform superbly at cancelling noise with a recurring pattern, such as jet engines, car engines, etc.

Please don't expect them to be studio monitor handphones, just look at the price. Sound quality is not very good, especially with the Noise-Reduction on, but it's sufficient for casual listening. They are quite comfortable even in long duration (the 14hrs flight). However, the hinge for collapsing the headphone might caught hair (not fun if you try the take off the headphone quickly) but with proper practice hair-pulling will becomes rare occurance.

To let other not to have false hope about noise cancelling system, I must spend some time to explain how they work. These headphone works by listen to the noise, find its pattern, then generate that pattern at a +or-180 deg. or +or- 1Pi radian phase angle. Therefore, the noise from the background and the "noise" generated by the headphone's will add up to zero, thus the noise is cancelled, or reduced in the least. Also you would be dreaming to have a headphone that cancels human noise because human don't talk with a recurring pattern. Only way for cancalling human voice is to predict what he/she going to say and I don't think any headphones can do that.

The white noise (the hiss) is noticible but tolerable. I know higher end headphones (like Bose QuietComfort II) has managed to pretty much eliminate that but they cost few times as much.

One complain is the control box and all the wirings. It's very awkward wearing it while your iPod or Discman is in a backpack. I ended up "dreadlock" the wires couple of times in one day of subway commute. It would be real nice if there's a belt clip at the back of the control box because I don't know where to place it so I can have easy access to the volume control.