Re: [Elecraft] 10 dB or 3?
In 2015 I had Shingles of the facial nerve (Ramsay Hunt Syndrome) and it caused me to lose 100% of my hearing on the right. Some came back but I have a -85 dB loss in my right ear and what I do hear is not what you hear but attenuated. Noise of any kind makes it difficult to hear and I have a pretty much world class stereo that helps greatly in hearing music but... Enter BOSE QC35 headphones... They are absolutely a Godsend when it comes to hearing. I've been using Bose headphones for years but the noise cancelling ability with these are the best yet. For computer, cell phone & TV I use its Bluetooth but for the K3s I plug in and this new generation of QC from Bose allows them to be passive or with noise reduction. As passive headphones they use no power and work just fine, they do cup the ear entirely and fit/act much like the ones I use with target practice. When plugged in, Bluetooth is defeated and when you power them on, the background sound disappears. My old Alpha is 1' from my head & on my good ear, with the Heil & Sony headsets, the fan is competing with faint signals. With the noise cancelling turned on, the fan noise is non-existent. I think I might hear the very faintest motor noise but I can't swear to it. The fan noise is totally gone. I don't think there is a microphone option when plugged in but when I use the headsets with the cell phone & I'm next to the amp, nobody I talk to can hear the fan so the noise cancelling truly works with the microphone as well. I got these from Bose as my old QC15 developed a problem and they don't repair out of production headsets but they give a generous price on a current set when you exchange your broken one. I even bought the YL a pair of the QC35 II for Christmas, they're that good. They have a 30 day trial if bought from Bose. I will say the included plug is miserably short and I had to buy a longer one from Amazon but it's a hefty cable and was inexpensive. I should add, when you turn on the noise cancelling & I'm listening to a faint CW signal, there is apparently zero loss of signal volume or quality, it's just that all the ambient sound and the sound like listening to a seashell you get with over the ear headphones just vanishes. YMMV 73, Gary KA1J > To add to what Don said, > > Restaurant noise levels are a plague for me. With my hearing loss the > noise level just shoves everything to sound like noise with no > intelligence detectable. > > I note that some now have cc activated on TV's with sound turned down > to keep background sound lowered. That allows patrons to follow > sports or news programs without everyone raising their voice to > compete with the TV. Background music is just noise if I want > conversation with anyone. Finer restaurants go to some lengths to > produce the "quiet atmosphere" for fine dining. The restaurants that > cater to twenty-something crowd seem to relish in making it loud. > > It really gets to me when they play loud music in the restrooms -ugh. > > Running the ham radio in the car or truck is challenge because I need > the volume too high for my wife's comfort. Do not wear a headset as > this might compromise my driving (ability to detect presence of other > vehicle). But then I try to operate in the "parked mode" as > distracted driving is not wise. Same for cellphone use while driving > (illegal in some states). > > 73, Ed - KL7UW >http://www.kl7uw.com > Dubus-NA Business mail: >dubus...@gmail.com > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to g...@ka1j.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 10 dB or 3?
To add to what Don said, Restaurant noise levels are a plague for me. With my hearing loss the noise level just shoves everything to sound like noise with no intelligence detectable. I note that some now have cc activated on TV's with sound turned down to keep background sound lowered. That allows patrons to follow sports or news programs without everyone raising their voice to compete with the TV. Background music is just noise if I want conversation with anyone. Finer restaurants go to some lengths to produce the "quiet atmosphere" for fine dining. The restaurants that cater to twenty-something crowd seem to relish in making it loud. It really gets to me when they play loud music in the restrooms -ugh. Running the ham radio in the car or truck is challenge because I need the volume too high for my wife's comfort. Do not wear a headset as this might compromise my driving (ability to detect presence of other vehicle). But then I try to operate in the "parked mode" as distracted driving is not wise. Same for cellphone use while driving (illegal in some states). 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 10 dB or 3?
Ted, I am not going to comment on the dB aspect, but the XYL and I have had great success in restaurants by asking the staff to turn down the music (or TV or whatever was making electronic sound). In many restaurants, it seems that the staff want to listen to *their* music over the din of patrons voices, and that only makes the situation worse. Lowering the music level will lower the overall noise level considerably. People tend to talk louder in a setting where there is loud audio background - they want to talk with their table partners over the electronic noise. I don't know how to counter the Holiday season when you have "Jingle Bells" or "Grandma got run over by a Reindeer" blasting in your ears - eat and shut up may be to only way to counter it or be branded as Grinch or Scrooge. Of course, there is always the one restaurant patron who has no concept of "inside voices" that becomes an irritant to everyone else. Choose restaurants with carpet instead of hard floors for a further decrease in ambient noise level - soft wall hangings help too. 73, Don W3FPR On 12/13/2018 12:16 PM, Dauer, Edward wrote: A very unpleasant dinner last night at a restaurant with a reported noise level of 84 db – about the same as a gas engine lawn mower seated at the next table – raised what is probably an elementary question. 3 db is the familiar doubling of power, and in an audio environment is a doubling of acoustic energy, I understand. However, I have read that ten db is what results in an apparent doubling of the sound level as we hear it. Is the difference attributable to something like an AGC circuit in the human auditory system? And as for RF transmitter power, does it take a ten db increase rather than 3 to effect an apparent doubling of audio amplitude in the ears on the other end of the QSO? Never mind the S meter – I mean the actual ability to hear a signal over the noise, or over the QRM. Help, anyone? Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to donw...@embarqmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 10 dB or 3?
One day there was a lull in testing so I stepped outside for some air. Sitting on the ground a few feet in front of the horn was the neighborhood mutt. The dog must have noticed me because it cocked its head and looked at me. The image was right out of the logo for the RCA corporation. Doug, K7CUU -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Dauer, Edward Sent: Thursday, December 13, 2018 9:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] 10 dB or 3? A very unpleasant dinner last night at a restaurant with a reported noise level of 84 db – about the same as a gas engine lawn mower seated at the next table – raised what is probably an elementary question. 3 db is the familiar doubling of power, and in an audio environment is a doubling of acoustic energy, I understand. However, I have read that ten db is what results in an apparent doubling of the sound level as we hear it. Is the difference attributable to something like an AGC circuit in the human auditory system? And as for RF transmitter power, does it take a ten db increase rather than 3 to effect an apparent doubling of audio amplitude in the ears on the other end of the QSO? Never mind the S meter – I mean the actual ability to hear a signal over the noise, or over the QRM. Help, anyone? Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d_hud...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 10 dB or 3?
Most human perception is logarithmic. A change in OVERALL LOUDNESS of about 10 dB is perceived as twice (or half) as loud. Changes in SIGNAL TO NOISE RATIO as small as 1 dB can be the difference between copy or not. This is true for music as well as speech or CW. When mixing live sound with multiple mics on instruments and voices, once balance is achieved, very small changes in the gain for any mic are usually required to stay in balance. 73, Jim K9YC On 12/13/2018 9:16 AM, Dauer, Edward wrote: A very unpleasant dinner last night at a restaurant with a reported noise level of 84 db – about the same as a gas engine lawn mower seated at the next table – raised what is probably an elementary question. 3 db is the familiar doubling of power, and in an audio environment is a doubling of acoustic energy, I understand. However, I have read that ten db is what results in an apparent doubling of the sound level as we hear it. Is the difference attributable to something like an AGC circuit in the human auditory system? And as for RF transmitter power, does it take a ten db increase rather than 3 to effect an apparent doubling of audio amplitude in the ears on the other end of the QSO? Never mind the S meter – I mean the actual ability to hear a signal over the noise, or over the QRM. Help, anyone? Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] 10 dB or 3?
A very unpleasant dinner last night at a restaurant with a reported noise level of 84 db – about the same as a gas engine lawn mower seated at the next table – raised what is probably an elementary question. 3 db is the familiar doubling of power, and in an audio environment is a doubling of acoustic energy, I understand. However, I have read that ten db is what results in an apparent doubling of the sound level as we hear it. Is the difference attributable to something like an AGC circuit in the human auditory system? And as for RF transmitter power, does it take a ten db increase rather than 3 to effect an apparent doubling of audio amplitude in the ears on the other end of the QSO? Never mind the S meter – I mean the actual ability to hear a signal over the noise, or over the QRM. Help, anyone? Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
