If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#51
|
|||
|
|||
In rec.aviation.misc Newps wrote:
: About what you'd expect from a salesman who's company who is getting their : ass kicked in the market. To put on an ANR headset in pretty much any spam : can and then to say, apparently with a straight face, that just because it : sounds quieter it really isn't is just assinine. I too have a pair of DC : 13.4's. Absolutely no comparison. These pieces of crap will no doubt last : my lifetime, because they never get used. Saying not to get ANR is like : saying stick with Loran, GPS doesn't offer you much more. Not necessarily B.S... The frequencies that are hearing-damaging are not necessarily the same as those that are annoying. The Lightspeed K/XL/G series all *depend* on ANR to reduce the perceived noise level. That's primarily the engine and it's harmonics (low frequency from 70-250 Hz or so). These frequencies aren't as hearing-damaging as the mid-frequencies. These headsets have extremely poor passive performance, and thus very poor performance at approx 1kHz. Not only that, but an unavoidable side-effect of ANR is spillover, which for the Lightspeeds is in about the same range. I've seen independent reviews of them showing the K/XL/G headsets *amplifying* noise in the 1khz frequency band. For many planes with modest noise damping material, it's not a problem. My Cherokee has no interior, so it has *lots* of mid-frequency rattle. I cannot use the K/XL/G headsets because the mid-frequencies are painfully loud. (I'm also more sensitive to these frequencies than most people). I did, however, purchase a Lightspeed QFR XC2, since it's got very good passive, and mild active. I'm very satisfied with it... doesn't cut out as much of the engine drone as the K/XL/G versions, but the clamping is very low, and mid-frequency attenuation is much better. In short, for most planes with some modest noise-proofing where the engine is extra-loud, the Lightspeed K/XL/G headsets are great. Very comfortable and light. They're plastic, so a bit fragile... especially in the cold. They have a very good "wow-factor" at making the engine noise go away... that's how they sell a lot. For my situation, however, they don't work at the sensitive mid-frequencies. YMMV -Cory -- ************************************************** *********************** * The prime directive of Linux: * * - learn what you don't know, * * - teach what you do. * * (Just my 20 USm$) * ************************************************** *********************** |
#52
|
|||
|
|||
These headsets have extremely poor passive
performance, and thus very poor performance at approx 1kHz. Says who? That's just not true. It's true for the Bose, though. -- Thomas Borchert (EDDH) |
#53
|
|||
|
|||
In rec.aviation.misc Thomas Borchert wrote:
: These headsets have extremely poor passive : performance, and thus very poor performance at approx 1kHz. : : Says who? That's just not true. It's true for the Bose, though. Lightspeed themselves on their review, IIRC. I know I saw it on a frequency response chart somewhere. My personal experience bears it out as well... REALLY crap at 1Khz-3kHz or so. They also boost those frequencies (not coincidentally the part of the spectrum required for intelligible speech) coming from the radio so it's louder, "clearer" and "more intelligible." I can't take the "louder" part in my rattly airplane and make it a no-go. As always, YMMV, but the numbers don't lie. Like I said, I've discovered that I'm overly sensitive to that frequency range compared to most. -Cory -- ************************************************** *********************** * The prime directive of Linux: * * - learn what you don't know, * * - teach what you do. * * (Just my 20 USm$) * ************************************************** *********************** |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FA: Like New David Clark Headsets: H20-10 & H10-13.4 | robertrr | Aviation Marketplace | 0 | July 11th 04 04:57 PM |
David Clarke Reviews | Paul | General Aviation | 42 | April 21st 04 02:55 PM |
Enola Gay: Burnt flesh and other magnificent technological achievements | me | Military Aviation | 146 | January 15th 04 10:13 PM |
David Cark for sale | Eskil | Aviation Marketplace | 0 | November 14th 03 01:54 PM |