Why are low frequency waves suitable for long distance communication?

Low frequency (LF) is the ITU designation for radio frequencies (RF) in the range of 30–300 kHz. Since its wavelengths range from 10–1 km, respectively, it is also known as the kilometre band or kilometre wave. LF radio waves exhibit low signal attenuation, making them suitable for long-distance communications.

Why do low frequency sound waves travel further?

As sound waves travel through a medium, they lose energy to the medium and are damped. Consequently, a sound wave can only propagate through a limited distance. In general, low frequency waves travel further than high frequency waves because there is less energy transferred to the medium.

What are the advantages of converting low frequency signal to high frequency signal?

i) FM is more efficient than AM because the amplitude of an FM wave is constant, irrespective of its modulation index. Thus, the transmitted power is constant. Also, in AM the transmitted power goes waste in the transmitted carrier. ii) FM reception is quite immune to noise in comparison to AM reception.

What is very low frequency used for?

The VLF band is used for a few radio navigation services, government time radio stations (broadcasting time signals to set radio clocks) and for secure military communication. Since VLF waves can penetrate at least 40 meters (131 ft) into saltwater, they are used for military communication with submarines.

Does high frequency signals travel more distance?

When you say lower frequency waves travel far, you are referring to electromagnetic waves that travel longer distances compared to higher frequency electromagnetic waves such TV waves. If speech or any information for that matter is transmitted using low frequency waves they travel long distances.

What are two reasons for frequency translation?

A frequency translation method is designed to shift low frequency signals to intermediate frequen- cies in order to utilize higher-frequency components. This solution, appropriate for applications involving 1-10MHz signals, can provide continuously variable gain and filtering at little cost in dynamic performance.

What is the advantage of converting a frequency?

Reduced maintenance costs & Increased machine lifetime. By running your machines at a slower, more efficient speed, frequency converters will help it to run much better for longer, which can reduce the need for maintenance and the costs that come with it.