Telex 750 in the 737

[Charlie Brown]

Hey just a quick question for you 737 guys out there:

Do you (or someone you have flown with) use the 750 headset and if so how well does it work? I believe it is TSO'd so it is an approved one for use as well if I am not mistaken. Any insight would be appreciated.

 

[Dewey Oxberger]

That's what I use. I put an earplug in my right ear and use that earpiece, and leave my left ear open to talk with the CA. It hurts a little after a few hours but no big deal at all. Good luck!

 

[Palomino]

i use it and it works fine. provides no hearing protection though. i'm considering the telex 850 with the ANR. don't know how much that would help, but it beats having no protection at all.

737 can be loud especially down low in an older generation with the speed up.

the 750 is certainly a better option than sharing spittle and cooties with the entire pilot force with the installed headset.

you can find them on ebay for $100 usually.

 

[Charlie Brown]

Thanks for the info, guys. Much appreciated.

 

[vixin]

I use the 750 with earplugs in both ears. I dont have any problems hearing the CA. For what its worth ANR does not give hearing protection. The hearing protection comes from cups that cover the ear passive reduction. The 850 is pretty good about this, the Bose QC2 was alot better. The 850 does not fully cover your ears. The ANR will reduce fatigue though.

 

[Jetjockey]

I use the the 750's with ear plugs. About the same Db noise reduction, and much cheaper than 850's. On the NG's, I sometimes forgo the earplugs. I've used the 750's in every jet I've flown. Great, affordable headset. They also take up very little room in the flight bag. Check Ebay, I've seen them for under $100.

 

[Green Banana]

I use the 850 in a 737. I like them. ANR works well and there is no battery to replace. It gets it's power from the mic plug. Slim and fits well in a flight case.

 

[HighSpeed]

Been Using the 750 on the 737 for over a year. I LOVE 'em.

Ive tried alot of others and keep comng back to the 750. I've used them in other aircraft for 10+ years. I always use earplugs in addition to the 750.

Just experiment with different earplugs to find the most comfortable for you.

 

[stein]

I use the 750 with earplugs in both ears. I dont have any problems hearing the CA. For what its worth ANR does not give hearing protection. The hearing protection comes from cups that cover the ear passive reduction. The 850 is pretty good about this, the Bose QC2 was alot better. The 850 does not fully cover your ears. The ANR will reduce fatigue though.

What do you mean by ANR does not provide hearing protection. Even with the "phase-shifted noise" from the speaker, the net volume reaching your eardrum is less, so the hearing protection does come from both the earcup, but more so from the ANR speaker itself.

I use the 850 in the 737 and had the older Bose on both pistons and turboprops and are happy with the 850. FWIW, the QC2 might not be allowed by your company. Mine specifically specifies a TSOd one.

 

[vixin]

The phase shifted noise is just opposite wave length noise. It is still noise that may damage your hearing. While it may reduce some, people get lulled into thinking ANR is hearing protection it is not. It is noise reduction (tricking the brain). The cup, the fuller the better(I know I thought it too) gives better hearing protection or earplugs. I have spent numerous hours in sound proof booths for hearing test. I am just saying be careful and protect your ears.

 

[PCL_128]

The phase shifted noise is just opposite wave length noise. It is still noise that may damage your hearing. While it may reduce some, people get lulled into thinking ANR is hearing protection it is not. It is noise reduction (tricking the brain).

This is a myth. Although you're providing a somewhat accurate description of how the technology works, you're incorrect that it doesn't protect your hearing. A quick search on google will turn up plenty of sources from MDs and scientists that discusses the benefits of hearing protection with ANR. The 20-25 decibels of noise reduction from ANR is just as good as 20-25 decibels of noise reduction from earplugs.

 

[vixin]

There are also sources that suggest what I am saying. Plus 10 cent earplugs or $500 headset. Just do what is best for you and research it.

 

[Nixon]

The phase shifted noise is just opposite wave length noise. It is still noise that may damage your hearing.

No, it isn't.

Consider waves on a lake. If I have a set of waves that start on one side of a lake, and I can generate waves on the other side of the lake that interfere with the first waves to cancel them out, I will end up with flat water. No waves equals no sound.

In other news, how do those of you using the Telex 850 in a 737 hear what your fellow pilot has to say? Do you slide the earcup back, or listen through the earcup, or use an intercom?

Nixon

 

[flatspin7]

I've used the telex 850 for about a year now, Ive been pretty happy with it. I normally keep my left ear open for conversation and call outs, but during cruise I normally use the other ear. There is no hot-mike intercom on the 737... you can use it by pushing the push to talk switch the other way but no one ever does that.

A lot of guys probably 50-70% use either a custom earmold or the little pine-cone looking thing. I honestly just find the feeling of something in my ear annoying. But each to their own.. If your on first year pay at CAL and want to save a few bucks just go to Sears and get an earmold made and away you go... just wipe them down before you use it!!!

 

[CLR2LAN]

I know this isn't a 737, but we use the 750's in the hawker. Has anyone tried these plugs with them?

http://www.etymotic.com/ephp/er20.aspx

I'm trying to get rid of the "faucet" noise that i'm constantly hearing. I tried normal foam ear plugs and turned up the radio, but it wasn't what i was looking for. I could see myself missing alot of calls that way.

I might have to give these a try and see.