Only when listening to the radio can noise be heard. If the noise is only heard when listening to the radio, it is possible that it is caused by the antenna. Take the antenna wire out of the receiver. If the noise disappears, you may need to add an antenna noise suppressor, which connects between your antenna and the receiver. This prevents noise on the antenna lead from being transmitted to the radio.
If the noise is heard with other sounds, such as voices, then it is most likely not caused by the antenna. It could be a problem with the radio itself. Try turning the volume down on the radio and listen to see if the noise goes away. If it does, try another radio. If the noise stays even when the volume is low, then it is most likely not the radio. You should call a technician to come fix the problem.
Request that the consumer disconnect the antenna from the radio to see if the noise goes away. If there is no or little change in the noise, the fault might be with the receiver or its power supply, or the RFI source could be nearby or linked to the same AC circuit. However, this is not always the case. A noisy radio can occur for many different reasons, so it's important to know how to fix it when it does.
If you determine that the problem is with the radio itself, then you will need to find a replacement part. Radios are not serviceable parts and will usually need to be replaced.
A damaged antenna can also cause a radio to make noise. It is best to replace antennas if they are old or not working properly. Antennas can also be damaged by moving heavy objects like trees or rocks too close to them. If you suspect that one of these causes the problem, have your radio inspected by an expert before you buy a new one.
Radio noise is a mix of natural electromagnetic atmospheric noise ("spherics," "statics") caused by electrical events in the environment such as lightning, anthropogenic radio frequency interference (RFI) picked up by the receiver's antenna, and thermal noise present in the receiver input... These noises are mixed together at the receiver's antenna and become the sound we hear as radio waves reach the ear.
The term "radio noise" is also used to describe all noise other than desired signals which is transmitted along with a broadcast transmission. This includes signal generators used during station testing, aircraft traffic, machinery, and many other sources of noise that might be encountered while listening to radio broadcasts.
Noise can be divided into two general types: random and repetitive. Random noise appears at random times and places and may or may not be related to the source of the original signal. Repetitive noise occurs in regular cycles and is usually associated with some type of mechanical movement (e.g., motor-driven fans, moving parts inside radios and other electronic equipment).
Random noise is generated by various physical processes occurring simultaneously at different locations in space. These include ionization effects produced by high-energy particles passing through material, such as those emitted by cosmic rays and radon gas; thermal noise from agitation of electrons in atoms and molecules; radio noise from atmospheric electrostatic charges; and radio noise from other sources such as power lines and radio telescopes.
Though some noise is inherent in the audio stream (tape hiss, amp gain, and so on), speaker hum and hiss are typically caused by improper wiring, ground loops, or other electromagnetic interference (AC line hum, RF interference, and USB and PC noise). To remove the noise, we must first remove the interference. Often this means replacing old wiring with new cable to prevent voltage drops, which can cause sound problems elsewhere in your home entertainment system.
Speaker wire gets hot when current is flowing through it, so there's a good chance that something is causing current to flow through your speaker wire-something that you should fix before experimenting with removing items from your system! If you're not sure what's causing the heat, you'll need to investigate further. You could try moving pieces of your system around or even swapping out components to see which one makes the problem go away.
If you continue to experience hum after checking for loose cables and wiring, replace your amplifier's power supply unit (PSU). These supplies do fail, so make sure you get a new one that fits properly when replacing an older model. A poor connection between the speaker terminals on the old supply and the power plug attached to the case may be why you're hearing noise even though the wires themselves look fine. Be sure to connect the negative lead of the supply to the case rather than the floor or another metal surface-this will prevent any electrical currents from being drawn from those sources instead of the supply.
As a result, you must determine if the source of the undesirable noise is continuous or just when particular sources are employed. Hissing and buzzing are not the sole indications of unwelcome sound. Loudspeakers can crackle and pop as well. This frequently indicates that something is amiss with the substance, such as a lack of contact. Make sure that the contacts on any power amplifier are making good contact with its corresponding chassis pin.
What should be done about radio interference?
The only sound you should hear from your television is that of whatever you're watching. Temperature variations may cause cracking or popping noises. Electrical feedback might generate a buzzing, crackling, or humming noise. Organizing the cords and ensuring that the TV has adequate airflow will help to keep it quiet.
If you listen carefully, you might be able to hear other sounds from your TV, such as its power supply or tuner module. These components are made to work hard and produce some noise themselves. There's not much you can do about this except find a place for them where they won't interfere with your viewing experience.
Other devices connected to your TV network, such as DVD players, set-top boxes, and game consoles, may also make noise. These devices use different parts of the wireless spectrum and therefore create audible interference with one another. To reduce noise pollution, just like with the TV itself, make sure all connected devices are in good working order before you start watching TV.
If none of these solutions works for you, there are two options: You can either live with the noise or you can buy a TV that's designed to be less noisy. There are several factors that go into choosing a quiet TV, including the type of signal it receives (analog or digital), but generally, the noisier the TV, the harder it is to watch in peaceable fashion.