humming caused by cellphone

And how many cases of people getting cancer from RFI * EMI transmissions..... what can you say about that?

Another possible reason that the companies have gone down in power is due to a little thing called heat. This is the same reason that computers have gone down from 5 volts to power the cpu to 3.3 volts. One of the reasons is with a faster the processor you get a higher frequency and more voltage peaks per a given time therefore more heat will be given off. If you drop that peak voltage from say 5v to 3.3v you also drop the current and the V*I will drop as well. And since they are trying to put these products in smaller cases they need all the help with heat as possible.

Also when you are using less power you're battery will last a hell of a lot longer. Ever remeber those 4W phones you speak of running out of battery in a couple hours (exageration). But seriously I know battery quality has increased greatly in the years with the intorduction of lithium ion and such but also we use less power to conserve batteries. Also electronic components these days use less power to get the same job done.

And for explanation of EMI, of more power = more EMI is not entirely true. There are a lot of factors that affect EMI, and the more common is the faster the rate of change of voltage per time the more EMI. The more power, which I believe you meant to say more current flowing in a conductor will affect the distance the EMI can have an affect on.

This is why power companies use zero voltage crossing circuits to trigger triacs instead of phase control. With zero crossing the rate of change of voltage per time period is less reducing the EMI and one of the main factors for this is there delicate electronics. They dont want it affecting their computers or their control lines.

But I would like you to point me to one of these scientific documents that you speak of. I find this quite facinating.

Also this arguing is getting quite old. You've probably done more damage to yourself sitting in front of your computer screen today then a cell phone would do in a year. I'm guessing you have a CRT screen where a beam of electrons are getting shot at you. Yes most of them hit the screen and get deflected elsewhere but for those ones that go through and into your body and actually hit your DNA and other vital info in your cells that cause cancer. Basically like a very low powered x-ray. Thats what you should be worried about!

I'll give you the same advice you gave me. You should throw away that cancer causing screen. We could all go back to horse and buggy and candle light and forget all about EMI and such. Ah wait a second then the smoke from the candle light, its a carcinogin and can give you lung cancer. My point, everything in life can harm you in some way or another you shouldnt preach to others about your feelings. I wasn't asking if I should throw away my cellphone in my post I was asking about a feedback problem.

This is what ruins forums. When people start assuming things and start giving an attitude. If you dont want to reply nicely, dont reply. There were plenty of other people willing to give their opinions in a nice way. Thank you to those that did.

regards

Mike 

I was not saying that more current was flowing in a 4 Watt cellphone. I was saying that's what increases the distance that EMI can be felt by other devices. I was also not saying and old cellphone created more or less EMI then todays. I was saying that they reduced it due to heat. I know how more power can be accomplished  and was not saying current gain was the only way. I was making that example for EMI distance purposes.

Exactly there is no document with proven cases of EMI causing cancer. Only speculation about its affect. They also believed the sun revolved around the earth at one point. Don't take that statement the wrong way. I am not saying EMI doesn't cause harm I'm just saying there is no proven research yet to prove or disprove their theories. But it was you with your origional post that said they cause cancer. You should have said cellphone are specualted by few to cause cancer.

I did say EMI affects electrical equipment. Funny at no point has anyone ever found a organic cell in a computer or other electrical device. The reason EMI affects electrical devices is because it can induce a voltage in a conductor that it cuts. And we all know electrical devices dont work quite right if there are different voltage levels then designed for.

Was that not advice?

And that was attitude and assumption. I don't talk while driving and you were giving me attitude about driving while talking.

Yes I am well aware about getting feedback from an open forum but where does my driving habits or unproven theories about cancer come in to play on a question about feedback in an audio forum?

I believe I have been very mature about this. I'm not sure if you were saying i was or was not but that does not concern me. You stated there is no proven research about EMI, RFI so you should not state it as fact until otherwise proven. And you totally lost my point about bad forums. If you were to ask a question and in response all you got was attitude you would not be happy either. I have shown you no attitude just clearly stated that theres no proven research to back up your opinion. 

One last question, what were you trying to get out of point 5 of your origional post? How was that of any relevance?

probably just to make me mad hey

Mike

WOW, that was interesting..... great to read....

I like my hands free set.....i dont think thats can hurt much (except for when I set it on my Lap)