Effects Library What are some objects that accidentally set off the library book alarm?
I frequently see people who aren't carrying anything set off the security gates at the library where I work. What is causing the problem? I've heard that magnets or watches can sometimes to do this. But why don't all magnets or all watches have this effect?
It is not easy to answer because it depends on the type of alarm system used.
The most popular system is sending a low power radio frequency and search for "something" that will be a tuned circuit for that freqency.
a Tuned circuit is typically a (small) piece of metal where one part behaves like a coil (it can be a long piece of wire more or less folded)
and a capacitor (i.e. two pieces of metal with an insulator between them)
Theoretically, it is very unprobable to find an object that will exactly have the right shape to trigger the alarm. I suspect this alarm sytem need some tuning to reduce its sensitivity.
Project Firewire Interface How can I get the most out of my Sennheiser HD 595 headphones?
A couple days ago I purchased a pair of HD595s, which will get here sometime soon. The question I have regards producing high enough quality sound to serve these headphones justice. I understand that an ipod cannot nearly drive these headphones as they should sound, as the reproduction is poor, but I do not know what I need to buy to get to that "hi-fi" level?
I have read about headphone amps, and will probably purchase one sometime soon. Any reccomendations? Also is there even a point of using a headphone amp with an ipod or will the sound still be poor?
One last thing, I am also looking to buy a decent firewire interface to start some recording projects (RME Fireface 800). Will this sound card reproduce the high quality audio I need to enjoy my HD595s?
an amp/dac combo like the fiio e7 will be fine for powering the HD595's. It doesn't act as a dac through the ipod output though.. only an amp. when plugged into a laptop the dac in the fiio bypasses the laptops dac so you'll get a better sound. the hd595 is a high sensitivity low impedance headphone so they can be powered pretty good without an amp but i feel they sound much better with one. you could always get a separate amp and dac to use with your ipod. I've always liked Ibasso products... you could look into them.
the last question is a little out of my knowledge
Would I Get Into A Film At The Cinema Using A School Library Card?
I'm going to turn 15 but I'm small so therefore do not look my age.
I will soon be going to look at 15 films in the listings but I think they would ask for ID.
I have a school library card which states my date of birth..
would this be acceptable ID?
I forgot to mention..
it has a photo of me on xD
A sensible looking photo ID with your DOB on it Should be enough to get you into the Cinema....
The Staff at the Cinema have to prove they do not believe you are the right age to see a film, so honestly any sort of official ID should be enough
Photocopy your Birth Certificate or better still your Passport as well and you should have more than enough ID to get you in..