Today's Message Index:
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1. 06:14 AM - Re: Headsets & hearing loss (Richard Pike)
2. 08:14 AM - Re: Re: Headsets & hearing loss (b young)
3. 08:32 AM - Re: Re: Headsets & hearing loss (Rick Neilsen)
4. 02:16 PM - Re: Re: Headsets & hearing loss (Gary Aman)
5. 03:08 PM - Advisory Circular 150/5345-27D (Dennis Thate)
6. 05:09 PM - Re: Headsets & hearing loss (Richard Pike)
7. 05:40 PM - Re: Re: Headsets & hearing loss (b young)
Message 1
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| Subject: | Re: Headsets & hearing loss |
[quote="jbhart(at)onlyinternet.ne"]At 04:18 PM 11/2/11 -0700, you wrote:
>
>
>
> I have the same type of hearing problem. I tried the ear buds but I could
> not keep them located in my ears. I went to a hearing aid salesman and
> asked him to make me some ear molds. He did. I never got around to
> mounting the ear buds, but I believe they will take care of the fall out
> problem. Also, by making the right adaptor, one could use them while flying
and on the lawn mower too, and may be get by just using ordinary muff ear protectors.
>
> Now if I can just find them....
>
> Jack B. Hart FF004
> Winchester, IN
You can make your own molded ear plugs fairly cheaply, and mold them to fit around
the ear buds, but it may take you more than one attempt. I bought several
sets of these Radians moldable ear plugs
http://www.amazon.com/Radians-Custom-Molded-Earplugs-Red/dp/B002XULPSQ/ref=sr_1_2?ie=UTF8&qid=1320411520&sr=8-2
and experimented with them. They are perhaps a bit quieter, not sure, but I could
not come up with a combination that stayed comfortable for any length of time
under the pressure of the head set. And they are tricky to get to fit when
you are trying to insert them and dealing with the short length of wire. Or maybe
I didn't mold them right.
I would mold the flexible stuff around the earbud and then have my wife help me
to get them properly seated in the ear, where it would set up in just a few minutes.
It was one of those things that almost worked. Since the plain earbuds
fit my ears ok and don't fall out, I decided that is good enough.
You can buy the silicone tips for earbuds in various sizes, and in my case, one
size fits very well, and the others either fall out or are uncomfortable. I assume
you have already experimented with this?
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
richard (at) bcchapel(dot)org
Kingsport, TN 3TN0
Now faith is the substance of things hoped for, the evidence of things not seen.
Hebrews 11:1
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=356882#356882
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| Subject: | Re: Headsets & hearing loss |
how about mounting a set of ear buds in something like this
http://www.amazon.com/Surefire-Sonic-Defenders-Medium-Clear/dp/B0012XT8B6
/ref=pd_sim_sg_3
the link has better photo, and if you scroll down there are other
options one of the options has a flap with a plug that would fit in
the hole, so i am nearly sure they are hollow into the ear canal.
been doing some searching for magnetic coupled connectors,,,, and found
some patents and line drawings on what i would like to use to connect
the ear buds to the inside of the headsets, but haven't been able to
find a supplier. still looking.
boyd young
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| Subject: | Re: Headsets & hearing loss |
Gary
Seems like I reported that your Jabiru powered MKIII was close to
the quietest I have flown in. Let me qualify that by saying that you added
a bunch of sound absorbing foam and it seems like your high quality head
sets had the active noise cancelling kit installed. I have ringing in my
ears all the time but after exposure to high noise levels it get worse for
a bit. I don't remember that I noticed any extra ringing after flying in
your plane but it was, what three years ago.
The nosiest Kolb I ever flew in was a 503 powered MKIIIC with a cheep head
set/intercom that had non standard plugs that I couldn't plug my Sigtronics
into. At full throttle (which we did a lot of) the noise was down right
pain full. The quietest Kolb was John H's MKIIIC. My theory is that big
fuel tank mounted high in the cage is a large viscus mass
that absorbs sound and noise producing vibration before it gets to the
cockpit. I don't remember the headset I used but I don't think he had and
active noise canceling in the passenger headset. That 912S was just a soft
purr, well maybe a bit higher pitch. I compare it to the old factory
MKIIIC demonstrator (fat albert) with the 912 which always got my ears
ringing.
One configuration of my VW powered MKIIIC was actually quieter than John
H's. It was the high mount redrive VW. The high mount used the same
Rotax style vibration dampers but the engine was mounted high over the
Rotax mount so as to allow clearance to the oil sump on the bottom of the
engine. The engine kind of floated on the mount twisting a bit under power.
One of the dampers failed after about a hundred hours. The noise level was
so low with the 3200 engine RPM at cruise and 2000 RPM prop that I actually
took my headset off for the briefest moment to see how bad it was.
Rick Neilsen
Redrive VW Powered MKIIIC
On Thu, Nov 3, 2011 at 5:25 PM, Gary Aman <zeprep251@aol.com> wrote:
> Rick,
> You wore the David Clarks when we rode in my MK3.Were they enough to be
> comfortable or have I become accustomed to the din the Jabiru produces?
> G.Aman
>
>
> -----Original Message-----
> From: Rick Neilsen <neilsenrm@gmail.com>
> To: kolb-list <kolb-list@matronics.com>
> Sent: Thu, Nov 3, 2011 2:44 pm
> Subject: Re: Kolb-List: Re: Headsets & hearing loss
>
> I'm currently using Sony ear buds under my Sigtronics head set that I
> added the headset inc. active noise reduction kit to. I got some adapters
> and plugged two sets of ear buds into my intercom one for me and one for my
> passenger. The ear buds provide almost as much additional noise reduction
> as ear plugs but do a better job with voice clarity than the heads sets so
> it works very well. I have been flying with this set up for about four
> years but now I occasionally loose one or both the ear bud connections and
> have to wiggle the adapters to get it working again. Richard P has
> developed a elegant solution but I wounder if a jack in the head set or in
> the intercom for the ear buds might be a better long term solution. I'm
> also getting close to wearing out the Sony ear buds and would not look
> forward to soldering in a new set with each change. Those tiny wires are a
> real pain with my fat fingers. I have never lost a ear seal from the ear
> buds but I have discovered at least with the Sony buds that the little
> handle on the ear buds bumps against the head set and isn't comfortable so
> I have scored and broken off the little ear bud handles.
>
> Rick Neilsen
> Redrive VW Powered MKIIIC
>
> On Thu, Nov 3, 2011 at 11:27 AM, b young <byoungplumbing@gmail.com> wrote:
>
>>
>> i had wondered about using regular ear buds, and plugging them into the
>> aux output on the intercom.. , sigtronics spo22n, and running the wires
>> under the ear cup seals. at least for a test, before i connected them into
>> the headset. as far as impedance,,, most ear buds, because they are
>> placed in the ear canal and need to move a much smaller volume of air to be
>> just as loud, and will have a much higher impedance than the speakers in
>> the headsets. the biggest difference in the impedance would show up in
>> how they are connected, series or parole, to the headset speaker. i have
>> nothing but a gut feeling on this one but i think i would go with parole.
>> instead of hard wiring them into the headset,,, i have wondered about a
>> small magnetic coupled connection, kind of like the new apple computer
>> laptop is using for the charging cable. this would eliminate ripping
>> something loose should it get pulled by accident.
>> opinions welcome
>>
>> boyd young
>> \mkiii utah/
>>
>>
>>>>>>>>>>>>>>>>
>> I've used regular earbuds under active headsets by just using an adapter
>> & plugging the earbuds into the a/c's headset jack instead of the
>> headset plug. The headset mic plug stayed in the regular configuration.
>> In a homebuilt (RV-4 in this case), it's so quiet I worried a little bit
>> that I might not hear a/c noise that I would *need* to hear.
>>
>> Charlie
>>
>>
>> ====**==============================**=
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>> ooks.com" target="_blank">www.buildersbooks.com
>> ="_blank">http://www.matronics.com/**contribution
>> le, List Admin.
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>>
>>
>>
> *
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>
Message 4
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| Subject: | Re: Headsets & hearing loss |
Rick,
Adding all that Denso- Foam made the difference,in the center section in pa
rticular. I think you are right about the liquid killing the noise in John'
s plane.Took a tour of Kennedy space center last year and one of the intere
sting pieces of information I recalled was the massive amounts of water the
y poured on the launch pad at lift-off.I thought it was to cool the pad,but
they said no,it was to control the noise. I still need to insulate the are
as behind the fuel tanks.I have the foam,will carry it south with me this y
ear and maybe get to it.
Maybe meet up again with you and some of the guys that are local.
G.Aman MK3C Jabiru 2200a
-----Original Message-----
From: Rick Neilsen <neilsenrm@gmail.com>
Sent: Fri, Nov 4, 2011 11:32 am
Subject: Re: Kolb-List: Re: Headsets & hearing loss
Gary
Seems like I reported that your Jabiru powered MKIII was close to the quiet
est I have flown in. Let me qualify that by saying that you added a bunch o
f sound absorbing foam and it seems like your high quality head sets had th
e active noise cancelling kit installed. I have ringing in my ears all the
time but after exposure to high noise levels it get worse for a bit. I don'
t remember that I noticed any extra ringing after flying in your plane but
it was, what three years ago.
The nosiest Kolb I ever flew in was a 503 powered MKIIIC with a cheep head
set/intercom that had non standard plugs that I couldn't plug my Sigtronics
into. At full throttle (which we did a lot of) the noise was down right pa
in full. The quietest Kolb was John H's MKIIIC. My theory is that big fuel
tank mounted high in the cage is a large viscus mass that absorbs sound and
noise producing vibration before it gets to the cockpit. I don't remember
the headset I used but I don't think he had and active noise canceling in t
he passenger headset. That 912S was just a soft purr, well maybe a bit high
er pitch. I compare it to the old factory MKIIIC demonstrator (fat albert)
with the 912 which always got my ears ringing.
One configuration of my VW powered MKIIIC was actually quieter than John H'
s. It was the high mount redrive VW. The high mount used the same Rotax sty
le vibration dampers but the engine was mounted high over the Rotax mount s
o as to allow clearance to the oil sump on the bottom of the engine. The en
gine kind of floated on the mount twisting a bit under power. One of the da
mpers failed after about a hundred hours. The noise level was so low with t
he 3200 engine RPM at cruise and 2000 RPM prop that I actually took my head
set off for the briefest moment to see how bad it was.
Rick Neilsen
Redrive VW Powered MKIIIC
On Thu, Nov 3, 2011 at 5:25 PM, Gary Aman <zeprep251@aol.com> wrote:
Rick,
You wore the David Clarks when we rode in my MK3.Were they enough to be com
fortable or have I become accustomed to the din the Jabiru produces?
G.Aman
-----Original Message-----
From: Rick Neilsen <neilsenrm@gmail.com>
Sent: Thu, Nov 3, 2011 2:44 pm
Subject: Re: Kolb-List: Re: Headsets & hearing loss
I'm currently using Sony ear buds under my Sigtronics head set that I added
the headset inc. active noise reduction kit to. I got some adapters and pl
ugged two sets of ear buds into my intercom one for me and one for my passe
nger. The ear buds provide almost as much additional noise reduction as ear
plugs but do a better job with voice clarity than the heads sets so it wor
ks very well. I have been flying with this set up for about four years but
now I occasionally loose one or both the ear bud connections and have to wi
ggle the adapters to get it working again. Richard P has developed a elegan
t solution but I wounder if a jack in the head set or in the intercom for t
he ear buds might be a better long term solution. I'm also getting close to
wearing out the Sony ear buds and would not look forward to soldering in a
new set with each change. Those tiny wires are a real pain with my fat fin
gers. I have never lost a ear seal from the ear buds but I have discovered
at least with the Sony buds that the little handle on the ear buds bumps ag
ainst the head set and isn't comfortable so I have scored and broken off th
e little ear bud handles.
Rick Neilsen
Redrive VW Powered MKIIIC
On Thu, Nov 3, 2011 at 11:27 AM, b young <byoungplumbing@gmail.com> wrote:
i had wondered about using regular ear buds, and plugging them into the aux
output on the intercom.. , sigtronics spo22n, and running the wires unde
r the ear cup seals. at least for a test, before i connected them into the
headset. as far as impedance,,, most ear buds, because they are placed
in the ear canal and need to move a much smaller volume of air to be just a
s loud, and will have a much higher impedance than the speakers in the head
sets. the biggest difference in the impedance would show up in how they a
re connected, series or parole, to the headset speaker. i have nothing bu
t a gut feeling on this one but i think i would go with parole. instead of
hard wiring them into the headset,,, i have wondered about a small magneti
c coupled connection, kind of like the new apple computer laptop is using
for the charging cable. this would eliminate ripping something loose shoul
d it get pulled by accident.
opinions welcome
boyd young
\mkiii utah/
I've used regular earbuds under active headsets by just using an adapter
& plugging the earbuds into the a/c's headset jack instead of the
headset plug. The headset mic plug stayed in the regular configuration.
In a homebuilt (RV-4 in this case), it's so quiet I worried a little bit
that I might not hear a/c noise that I would *need* to hear.
Charlie
om" target="_blank">www.aeroelectric.com
ooks.com" target="_blank">www.buildersbooks.com
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le, List Admin.
arget="_blank">http://www.matronics.com/Navigator?Kolb-List
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le, List Admin.
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ic.com">www.aeroelectric.com
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help.com">www.homebuilthelp.com
bution">http://www.matronics.com/contribution
tor?Kolb-List">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
bution">http://www.matronics.com/contribution
_blank">www.aeroelectric.com
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| Subject: | Advisory Circular 150/5345-27D |
Thanks for your inquiry. The standard for windsocks is found in FAA Advisory Circular
150/5345-27D. This says the windsocks have to indicate the proper direction
at wind speeds as low as 3 knots and the windsock is supposed to stand
straight out at speeds between 14 and 17 knots.
When we changed vendors we made some observations of the competing windsocks.
I dont think you can really judge the wind speed by looking at the windsock, but
you can get a pretty good idea of the direction.
Mn/DOT
651.226.2043
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
These flying machines are just a fad and will never catch on Unknown
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=356925#356925
Attachments:
http://forums.matronics.com//files/dsc01797_135.jpg
Message 6
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| Subject: | Re: Headsets & hearing loss |
byoungplumbing(at)gmail.c wrote:
> how about mounting a set of ear buds in something like this
>
> http://www.amazon.com/Surefire-Sonic-Defenders-Medium-Clear/dp/B0012XT8B6/ref=pd_sim_sg_3 (http://www.amazon.com/Surefire-Sonic-Defenders-Medium-Clear/dp/B0012XT8B6/ref=pd_sim_sg_3)
>
> boyd young
>
How about if you got some small diameter silicone tubing - the size that they use
on model airplanes - attach it to the passage that runs through the Sonic Defender
insert and let it extend to outside and below the headset cushion, and
then attach the ear bud at that point? Hanging a few inches below the headset
muff, with the tubing lying between your head and the headset cushion. Attach
the ear bud wires to the head set as described in my previous post. Now the ear
bud is not being smashed up against your ear by the inside of the headset,
and you ought to have the best of both worlds. Sound dampening from the headset
and from the insert both. Thoughts?
One caveat: some earbuds have an opening in the back for some sort of acoustic
reason - if you used it in this manner, would it be better to seal that up? Would
that not let sound pass through the earbud and on up the tube?
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
richard (at) bcchapel(dot)org
Kingsport, TN 3TN0
Now faith is the substance of things hoped for, the evidence of things not seen.
Hebrews 11:1
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=356928#356928
Message 7
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| Subject: | Re: Headsets & hearing loss |
One caveat: some earbuds have an opening in the back for some sort of
acoustic reason - if you used it in this manner, would it be better to seal
that up? Would that not let sound pass through the earbud and on up the
tube?
--------
Richard Pike
>>>>>>>>>>>>>>>>>>>>>>>>>>
is the opening in the back an air passage way to eliminate pressure
differences in the inner ear to the outside air pressure,,
boyd young
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