If I'm going to fork out $300-600 (forget the Bose X!) for an ANR
headset... I would like one that, in addition to being good in its
intended use, is also comfortable in the 747 cabin, just hooked up to
MP3 or CD played, or the IFE system. I'll be doing a lot of
transatlantic commuting in the next few months, and I want to get
maximum use out of the thing!
Suggestions? Good fidelity sound with music is obviously important, as
is comfort for long periods, longer than the average GA flight!
Looking at things like the Lightspeeds, Telex, the Denali ANR,
possibly the Headsets Inc. EM-1, though that seems pretty heavy...
want to stay under $500, preferably under $400.
TIA
Mike
http://www.corestore.org
FOR SALE - Al Qaeda rifle. Never fired. Dropped once.
I'd be surprised if they let you wear a full headset in a 747 cabin. I've
had problems (even prior to 9-11) wearing even regular earphones on
commercial flights.
--
Paul Tomblin <ptom...@xcski.com>, not speaking for anybody
"Help!! Come see the violence inherent in the sysadmin!"
- Cobb, User Friendly, by Illiad
"Paul Tomblin" <ptom...@xcski.com> wrote in message
news:avd5r7$afl$1...@allhats.xcski.com...
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>In a previous article, Michael Ross <aba...@attglobal.net> said:
>>headset... I would like one that, in addition to being good in its
>>intended use, is also comfortable in the 747 cabin, just hooked up to
>>MP3 or CD played, or the IFE system. I'll be doing a lot of
>
>I'd be surprised if they let you wear a full headset in a 747 cabin. I've
>had problems (even prior to 9-11) wearing even regular earphones on
>commercial flights.
I've not heard that suggested; would be very suprised if it were the
case. Closest I've come is cabin crew on a couple of US airlines
checking up on me - they used to charge for 'headphone rental' for the
movies, then when people started bringing their own they brought in a
'exhibition fee' if you used your own to listen... all they were
concerned about was making sure mine were plugged into my MP3 player,
not their IFE, and I wasn't watching the movie on my $1000 ticket for
'free'! :-/
This was a set of the early Sony consumer ANR headphones, full-size,
as big as many aviation headsets. They recently gave up the ghost,
hence thinking about killing two birds with one stone...
What do you think the reason might be for not letting me wear headset
in cabin? Maybe I'm too innocent but I can't think of one!
Impedence is wrong on aviation headphones. If you plugged them into
a cd player you wouldn't hear anything.
--
Ben Jackson
<b...@ben.com>
http://www.ben.com/
The feeble excuse I was given was that I wouldn't be able to hear cabin
announcements. That was with open-type Sony Walkman earphones. Mind you,
this was on a Canadian airline back in 1992, which also forbade people
from carrying on exacto knives and other small blades, something that you
might think about in light of 9-11.
--
Paul Tomblin <ptom...@xcski.com>, not speaking for anybody
chown -R us /yourbase
- Simon Slavin
>In article <a46k1v8ooj35h93qh...@4ax.com>,
>Michael Ross <aba...@attglobal.net> wrote:
>>intended use, is also comfortable in the 747 cabin, just hooked up to
>>MP3 or CD played, or the IFE system.
>
>Impedence is wrong on aviation headphones. If you plugged them into
>a cd player you wouldn't hear anything.
I did wonder about that initially... but I've been told otherwise. I
called Headsets Inc. this afternoon, told him what I planned, and he
said the EM-1 would sound great on my MP3 player. He understood this
was in the 747 cabin, not a panel hookup.
One way around it is to use a flightcell (www.flightcell.com) - it does the
impedance matching - allows you to interface to your cell phone - and has
aux in / aux out for playing music / recording ATC etc. I use one, and it
works just fine.
They've just released a stereo version and a version specifically for Bose
panel mount headsets.
I hate to say it, but the best audio quality I've come across is the Bose.
"Ben Jackson" <b...@ben.com> wrote in message
news:hdqS9.589753$P31.211150@rwcrnsc53...
> Normal headset impedance is 8 ohms for regular headsets and 300 ohms
for
> aviation headsets - the impedance mis-match causes all sorts of
sound
> quality problems.
You're the second one to say this basic thing, but all I can tell you
is that I've worn my Bose X on commercial flights, plugged them into
the 1/8" jack with a 1/4" to 1/8" adapter ($1.49 at Radio Shack) and
it works just fine, there as well as on my home stereo.
--
Marc J. Zeitlin marc_z...@alum.mit.edu
http://www.cozybuilders.org
http://marc.zeitlin.home.attbi.com
I'm looking for an ANR headset that would work well in the plane, but also
that I could wear to bed to cancel out my wife's snoring.
--
Paul Tomblin <ptom...@xcski.com>, not speaking for anybody
"and by God I *KNOW* what this network is for, and you can't have it."
- Russ Allbery draws a line in the sand for Usenet.
(http://www.eyrie.org/~eagle/writing/rant.html)
-Greg Burkhart
"Michael Ross" <aba...@attglobal.net> wrote in message
news:a46k1v8ooj35h93qh...@4ax.com...
Ben Jackson wrote:
> Impedence is wrong on aviation headphones. If you plugged them into
> a cd player you wouldn't hear anything.
Wrong! You will hear the music, but the level is a little low.
If I plug my Lightspeed or DC aircraft headsets directly into my Sony
CD player, the level is about 6db lower than it is using the Sony
headset, but the fidelity is excellent. In a normal room environment,
the level is adequate for normal listening.
The reduction in sound level results from the higher impedance of the
aircraft headphones. The Sony CD player's factory supplied headphones
have an impedance of about 30 Ohms.
The Sony CD player is powered from two 1.5V batteries,
so the peak voltage it can deliver to its 30 Ohms headphones is limited
to 1Vrms (3Vp-p), or (1^2)/30 = 33 mW. When 150 Ohm aircraft headphones
are substituted, the voltage is the same, but the sound power is
(1^2)/150 = 6.6mW, or 7db less.
My Pacer has a Sigtronics SPA400 intercom. The RES-400 Remote Stereo
Music Switcher add-on has an internal switching relay, which
effectively just connects the CD player inputs directly to the aircraft's
headset jacks when there is no activity on the aircraft radios or
the intercom.
When I plugged the Sony CD player into the stereo input of
the RES-400 Remote Stereo Music Switcher, even with the volume all
the way up on the Sony, the music level is just a little too low in
the noisy Pacer. Almost usable, but just a little too low :=(
My solution was to build a stereo amplifier to put between the Sony CD
and the RES400. The gain of each channel was hardwired to be 6db, to make
up for the loudness loss. I also added a 3V regulator to power the Sony
player from the aircraft power. Since the FM radio in the Sony uses
the headphone cord as its antenna, I also did some tricky things with
RF chokes to isolate the audio cable so that it would still act an a
FM antenna...
btw- the music fidelity of the Lightspeed headsets (with ANR on) is killer.
They appear to have bass response down to below 30Hz.
MikeM, PhD EE
Pacer '00Z
Skylane '1MM
Look at my other post in this thread.
The headphone impedance on CD and MP3 portable players battery-powered
is bout 30 Ohms. Aviation headsets actually have an impedance
of 150 Ohms. Some HiFi home entertainment Stereo headsets are 8 Ohms.
The only problem caused by plugging an 150 Ohm aviation headset into a device
designed to drive 30 Ohm headsets is lower than normal sound level.
Plugging an 8 Ohm stereo headset into an Aircraft, or portable CD/MP3
device may produce distortion because the audio output stage is incapable of
delivering the peak currents required to drive the low impedance.
If you plugged an 8 to 30 Ohm headset into your airplane, the problem you
create is that the 30 Ohm headset is so much louder than the other aviation
headsets, that you could not stand it. If you turned down the audio so that
it was comfortable for you, then all of the aviation headset users would be
complaining that the level is too low...
MikeM
http://www.aviationtoday.com/reports/avionics/previous/1201/1201asd.htm
> The only problem caused by plugging an 150 Ohm aviation headset into a
device
> designed to drive 30 Ohm headsets is lower than normal sound level.
All I can say is that when I plug my Bose X into the headphone jack on my
VCR it sounds terrible (severe distortion of certain frequency bands) - when
I connect it via my flightcell it's fine.
> I'd be surprised if they let you wear a full headset in a 747 cabin.
>
No problem at all with Lufthansa, Air Canada, United, Delta and
American - pre-911, that is. Only funny looks and some commentary from
flight attendants. One said: "So you're gonna fly us now?" My answer:
"If you let me" ;-)
--
Thomas Borchert (EDDH)
Not going flying this afternoon...
MikeM
Pacer '00Z
> KSLC 090006Z 29007KT 0SM FZFG VV001 M02/M02 A3010 RMK AO2 SFC VIS 1/4
> RVRNO $
>
> Not going flying this afternoon...
Didn't you get the blue card with the hole in the middle? You just hold it
up to the sky, and if doesn't match you don't fly :-)
Phil
CFI Student
> Check the impedance.
>
not a problem at all with my Lightspeed 20K.
--
Thomas Borchert (EDDH)
> Impedence is wrong on aviation headphones. If you plugged them into
> a cd player you wouldn't hear anything.
>
That's simply not true at all. Stop distributing such OWTs, please!
My Lightspeeds work very well with all kinds of consumer electronics.
--
Thomas Borchert (EDDH)
It's a dreamer METAR.
So get all your maps and take all the time you have to dream about all
thoses good flying days !
;-)
Dave Reinhart
wa6...@amsat.org
Michael Ross <aba...@attglobal.net> wrote in message news:<a46k1v8ooj35h93qh...@4ax.com>...
>Try the Softcomm C-100. I have used Softcomm headsets for yesrs.
>Picked up the C-100 for approx. USD 300.00.
I have used the Softcomm C-90 (battery powered ANR) for about a month
and am so far very pleased. Get it from Marv Golden for about $250,
IIRC.
Rob
A 300 ohm headset works fine in an 8 ohm jack. An 8 ohm headset can
pull a 300 ohm jack down to where the quality is very poor. Impedance
matching is a black arts, compared to building electronic equipment with
magic rocks. :-)
--
Highflyer
Highflight Aviation Services
>Impedance
>matching is a black arts, compared to building electronic equipment with
>magic rocks. :-)
What? No!
Impedance matching is the fun part of electronics design, the thing
that makes a "clever" design go boom when you don't want it to!
Electronics is a *fun* black art!
:-)
I had a college roommate who kept returning his amplifiers to the
store, claiming they were unstable. When I saw his setup I noticed he
was driving no less than four eight-ohm speakers out of each channel,
for a resultant load of 2 ohms. (if I recall my math correctly) The
impedance was mismatched 4:1! Not good for power transfer. He kept
letting the magic smoke out of his power amp. :-)
I told him to put a current limiting resistor on his amp. Three years
later he still had 'em there, and the thing was still working
properly.
Rob
>In article <a46k1v8ooj35h93qh...@4ax.com>,
>Michael Ross <aba...@attglobal.net> wrote:
>>intended use, is also comfortable in the 747 cabin, just hooked up to
>>MP3 or CD played, or the IFE system.
>
>Impedence is wrong on aviation headphones. If you plugged them into
>a cd player you wouldn't hear anything.
Well, I went and bought Lightspeed 20-3G... $435, seemed a good deal.
Music from MP3 player is awesome and as loud as I can handle. Pretty
comfortable too. Flying to UK next weekend, we'll see how they go.
Thanks for all advice.
I understand that GA ANR is optimized to cancel the low-frequency noise
created by exhaust and prop noise; the passive noise reduction handles
whatever high-frequency noise is present. Extending this idea to your
requirement, it would seem to me that the ANR feature won't do you much good
on an airliner and you now have to contend with the impedance mis-match
issue discussed by some of the other posters.
It's an intriguing idea, though. I've often considered taking my DCs with a
Headset, Inc ANR installation on an airliner. American no longer charges
for your use of private headsets (they'll sell you a set of theirs for $2
that you can keep and use free on future flights).
"Michael Ross" <aba...@attglobal.net> wrote in message
news:a46k1v8ooj35h93qh...@4ax.com...
> Hi folks,
>
> If I'm going to fork out $300-600 (forget the Bose X!) for an ANR
> headset... I would like one that, in addition to being good in its
> intended use, is also comfortable in the 747 cabin, just hooked up to
> MP3 or CD played, or the IFE system. I'll be doing a lot of
> transatlantic commuting in the next few months, and I want to get
> maximum use out of the thing!
>
> Suggestions? Good fidelity sound with music is obviously important, as
> is comfort for long periods, longer than the average GA flight!
> Looking at things like the Lightspeeds, Telex, the Denali ANR,
> possibly the Headsets Inc. EM-1, though that seems pretty heavy...
> want to stay under $500, preferably under $400.
>
> TIA
>
No, but then the consumer models of ANR headsets don't either. Like the
aviation models, they are really only canceling the lower frequencies. Of
course, the higher frequencies are still attenuated by the physical
characteristics of the headset, but in that respect the aviation headsets
would be superior to the consumer models.
Pete
there's a lot of low frequency noise on airliners as well, if not as
much as on props. But it's sure better than anything the airline gives
you.
--
Thomas Borchert (EDDH)