Register to reply

Why do my speakers pick up radio stations?

by mr-tom
Tags: pick, radio, speakers, stations
Share this thread:
mr-tom
#1
Jul27-08, 11:26 AM
P: 18
I get random radio broadcasts coming from my logitech speakers when they are turned on but with no volume. Why is this?
Phys.Org News Partner Engineering news on Phys.org
An innovative system anticipates driver fatigue in the vehicle to prevent accidents
Squink personal factory aims to make circuit prototyping easy
Catching grease to cut grill pollution
chroot
#2
Jul27-08, 01:30 PM
Emeritus
Sci Advisor
PF Gold
chroot's Avatar
P: 10,429
Because they're poorly made. Some of the wiring inside the speaker acts as an antenna, and some part of the circuit provides the diode behavior necessary for demodulation. The resulting audio frequency energy is faithfully amplified by the power amplifier, and viola, you have a radio.

- Warren
russ_watters
#3
Jul27-08, 03:36 PM
Mentor
P: 22,213
Is this at home? Are they plugged into a computer? Do you get the radio when you unplug them from the computer?

My company helped a building in Philly with a problem where the frame of the building was receiving radio waves and everything with a microphone or speakers on certain floors would play the radio station being broadcast from next door.

jim mcnamara
#4
Jul27-08, 05:22 PM
Sci Advisor
PF Gold
P: 1,379
Why do my speakers pick up radio stations?

We had to build what amounts to a Faraday cage around a computer next to WNBC in Washington DC .... long loooong ago.

What you see is not all that uncommon, especially if there is a powerful radio antenna nearby.


Register to reply

Related Discussions
A question for hams/radio heads: radio astronomy Electrical Engineering 6
Why cant u make radio transmitter that transmit visible light instead of radio waves? Introductory Physics Homework 1
Petrol Stations General Discussion 9
Power Stations Introductory Physics Homework 4