Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old August 23rd 06, 07:24 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 49
Default Hearing loss

wrote in message
...

but that is because I am getting old.Sometimes I hear a
swishing noise in my ears



Its ur ****ing brains sloshin around your skull ya ancient old ******* !


LOL Just joshin with ya!



  #2   Report Post  
Old August 24th 06, 01:33 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 285
Default Hearing loss

Since many of in this group will use earphones it might be usefull to
limit the damage to our hearing that could be cuased by overly
load audio blasting into our ears.

Since I already have some minor loss in the 8KHz and up, I try to guard

my hearing from further damage. The last thing I need is more loss to
further limit my ability to understand signals lost in the noise.

http://headwize.com/articles/hearing_art.htm

I use a modified version of the clipper shown in diagram 9
at http://headwize.com/projects/cmoy2_prj.htm

For my pruposes I use the following values:
P1=1 K ohm
P2=1K ohm
R1=1K ohm
R2, not present , a direct connection to the diodes.
And I use 2 parallel sets of Si diodes in series to give a max voltage
of +/-1.4V.

This corresponds to a maximum sound level of 98dB with my
anceint Sennheiser HD-424. While safe for short periods,
96dB causes me to simply get tired after an hour or so, so
I can rdeuce the level with P2 to a more comfortable point.

I also have the ability to switch a transformer to allow receivers with

less AF voltage to be used. I choose to use a 70V, as in "constant
voltage", transformer to boast the common 8 Ohms to 500 Ohms. I
used the largest transfomrer I could find to reduce distortion that can

be caused by too little iron in the core.

I wanted the protection to be the last step before the earphones in
case
my amplifeir fires or I feed too strong a signal. The clipper" also
helps when
listening during the summer by clamping the lightning crashes to a more
reasonable level.

Terry

  #3   Report Post  
Old August 24th 06, 03:27 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 97
Default Hearing loss

I probably do not understand much about your project. But wouldn't the
simple solution be to just use the AF gain judiciously? To start at a
low setting and increase only to the level needed.


wrote:
Since many of in this group will use earphones it might be usefull to
limit the damage to our hearing that could be cuased by overly
load audio blasting into our ears.

Since I already have some minor loss in the 8KHz and up, I try to guard

my hearing from further damage. The last thing I need is more loss to
further limit my ability to understand signals lost in the noise.

http://headwize.com/articles/hearing_art.htm

I use a modified version of the clipper shown in diagram 9
at http://headwize.com/projects/cmoy2_prj.htm

For my pruposes I use the following values:
P1=1 K ohm
P2=1K ohm
R1=1K ohm
R2, not present , a direct connection to the diodes.
And I use 2 parallel sets of Si diodes in series to give a max voltage
of +/-1.4V.

This corresponds to a maximum sound level of 98dB with my
anceint Sennheiser HD-424. While safe for short periods,
96dB causes me to simply get tired after an hour or so, so
I can rdeuce the level with P2 to a more comfortable point.

I also have the ability to switch a transformer to allow receivers with

less AF voltage to be used. I choose to use a 70V, as in "constant
voltage", transformer to boast the common 8 Ohms to 500 Ohms. I
used the largest transfomrer I could find to reduce distortion that can

be caused by too little iron in the core.

I wanted the protection to be the last step before the earphones in
case
my amplifeir fires or I feed too strong a signal. The clipper" also
helps when
listening during the summer by clamping the lightning crashes to a more
reasonable level.

Terry


  #4   Report Post  
Old August 24th 06, 03:38 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 285
Default Hearing loss


John S. wrote:
I probably do not understand much about your project. But wouldn't the
simple solution be to just use the AF gain judiciously? To start at a
low setting and increase only to the level needed.

Yes.
If you can be certain to never mess up.
I am experimenting with several different detectos, filters and audio
amps. Very easy to mess up and get very loud pops, squals and
other unpleasent shocks.

That, plus the fact that when trying to dig out a weak station I
turn the volume up and when someone nerby turns on a light, or
that nasty flood blender also causes very loud pops etc.

By having the limiter the last thing before my earphones I
insure that simple mistakes won't hurt.

Terry

  #6   Report Post  
Old August 24th 06, 04:58 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jun 2006
Posts: 8,878
Default Hearing loss

I always keep my radios and tv sets turned down lowwww.(I hate earphones
and earbuds,I never use them) I have ear tintinitus, (however it is
spelled?) but that is because I am getting old.Sometimes I hear a
swishing noise in my ears.
cuhulin

  #7   Report Post  
Old August 24th 06, 05:17 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 168
Default Hearing loss

What?
Heh?
What did you say? Heh!
wrote:
Since many of in this group will use earphones it might be usefull to
limit the damage to our hearing that could be cuased by overly
load audio blasting into our ears.

Since I already have some minor loss in the 8KHz and up, I try to guard

my hearing from further damage. The last thing I need is more loss to
further limit my ability to understand signals lost in the noise.

http://headwize.com/articles/hearing_art.htm

I use a modified version of the clipper shown in diagram 9
at http://headwize.com/projects/cmoy2_prj.htm

For my pruposes I use the following values:
P1=1 K ohm
P2=1K ohm
R1=1K ohm
R2, not present , a direct connection to the diodes.
And I use 2 parallel sets of Si diodes in series to give a max voltage
of +/-1.4V.

This corresponds to a maximum sound level of 98dB with my
anceint Sennheiser HD-424. While safe for short periods,
96dB causes me to simply get tired after an hour or so, so
I can rdeuce the level with P2 to a more comfortable point.

I also have the ability to switch a transformer to allow receivers with

less AF voltage to be used. I choose to use a 70V, as in "constant
voltage", transformer to boast the common 8 Ohms to 500 Ohms. I
used the largest transfomrer I could find to reduce distortion that can

be caused by too little iron in the core.

I wanted the protection to be the last step before the earphones in
case
my amplifeir fires or I feed too strong a signal. The clipper" also
helps when
listening during the summer by clamping the lightning crashes to a more
reasonable level.

Terry


  #9   Report Post  
Old August 24th 06, 08:01 PM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jun 2006
Posts: 8,878
Default Hearing loss

Isn't that,maybe the beer I drink does it to my ears.My little doggy
only drinks fresh tap water,(and eats Natural Choice dog food
www.nutroproducts.com $20.00 per twenty pound bag and every eleventh
bag is free,and I always save a few spoonfulls of whatever I eat for her
and let her clean the plate) I change the water out several times every
day.And she isn't a stupid French poodle dog.
cuhulin

  #10   Report Post  
Old August 25th 06, 12:30 AM posted to rec.radio.shortwave
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 4,124
Default Hearing loss

wrote in
:

I am getting old.Sometimes I hear a
swishing noise in my ears.
cuhulin



What does it sound like?


Sc


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Inverted ground plane antenna: compared with normal GP and low dipole. Serge Stroobandt, ON4BAA Antenna 8 February 24th 11 10:22 PM
Reflection Loss Reg Edwards Antenna 19 March 7th 06 07:15 PM
Peaked and Tuned Dan CB 108 May 15th 04 03:48 PM
QST Article: An Easy to Build, Dual-Band Collinear Antenna Serge Stroobandt, ON4BAA Antenna 12 October 16th 03 07:44 PM
The two sorts of loss Reg Edwards Antenna 10 August 21st 03 07:41 PM


All times are GMT +1. The time now is 01:59 AM.

Powered by vBulletin® Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017