Can others hear wireless headphones ?

Question : Can other people intercept wireless headphones sound ?

Answer : 
Radio-wave headphones : Yes they can, by someone using radio-wave headphones within the trnasmission distance. This distance could cover about 50m. If it has a built-in mic and is set for transmission, any sound transmitted by the mic can be intercepted.

Infra-red : These work in line of sight of the transmitter only, so in a room you are probably quite safe.Only anyone in line of sight and with a set of infra red headphones could intercept the transmission.

Blue-tooth headphones : I am not sure. If I had designed bluetooth then it would be secure. However the world went ahead with security not in mind and connectivity being everything, so perhaps a bluetooth headphone could 'connect' to another device within about 50m which was someone else's. I would like to say bluetooth is secure but currently I don't know. Radio-waves would not seem able to be made secure, whereas I am guessing manufacturers could secure bluetooth.

Wifi : I don't know if wifi headphones exist but the same rules/doubts would probably apply as bluetooth. You would need to connect them to a router, which is hassle compared to bluetooth.

My preference would be infra-red until security is known of other types (although they can't receive out of sight of the trnasmitter) or bluetooth headphones in the hope they were secure (but the device would need to be bluetooth compatible)   

Other ways of asking the question :
Cnn wireless headphones be intercepted ?
Can neigbors hear wireless headphones ?
Can others eavesdrop wireless headphones ?

Chrome is saving rather than printing

Problem : Google Chrome. I want to print but it saves instead

Answer : On the Chrome print page, the 'destination' should be 'print' and not 'PDF'. In the 'Destination' section, click on change and change it to your named printer.

For some reason, the 'print' destination has changed to (most likely) 'PDF', meaning you are saving the documents as a PDF rather than printing them. In the destination section, click on change and change it to your named printer.

on Google Chrome print page
Look for 'Destination' in the left-hand sidebar
Click change
Change it to your named printer

Huawei Ascend Y300 : How to delete text messages

How do I delete text messages in the Huawei Ascend Y300 ?

Answer : Hold down the text message with your finger. A menu will appear with the option to delete (among other things) 

Remove files from google search cache and google search

How to remove files (pdf, doc, txt etc) and website listings from google cache and google search

Answer : Probably the quickest first way to try is this :
https://www.google.com/webmasters/tools/removals
It may take a few days before it's removed

If that doesn't work (it may take a few days), then you would probably have to try more complex ways
https://support.google.com/webmasters/answer/1663691?hl=en