Why low frequency can travel longer distance?

Lower frequency radio waves can reflect off of the ionosphere, and the surface, multiple times and so can travel for very long distances over the surface of the earth. Line of sight is not required for reception of lower frequency radio waves.

What are the advantages of modulating low frequency signal into 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.

Does higher or lower frequency travel further?

In general, low frequency waves travel further than high frequency waves because there is less energy transferred to the medium.

Why do high frequency signals travel longer than low frequency signals?

The distance that the sound needs to travel is one of the key considerations in determining the frequency of the signal. Low frequency signals are absorbed less rapidly in the ocean than high frequency signals. They can therefore travel longer distances and still be detected.

Why high frequency can travel more distance?

Because both are simply EM waves. They differ only in rate of information sent. Due to the penetration power of high frequency radio waves in general, is the major limitation of FM staions where the AM uses ionosphere for reflection and hence it covers more distance.

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.

What is modulation explain the need of modulating a low frequency information signal?

(a) A low frequency signal is modulation for the following purposes : (i) It reduces the wavelength of transmitted signal and the minimum height of antenna for effective communication is λ / 4. Therefore, the power radiated into the space increases and signal can travel larger distance.

Can high frequency travel far?

The short answer is yes. Lower frequencies like HF (High Frequency) can travel around the world.

How far can low frequencies travel?

A low frequency sound wave of about 20 Hz has a wave length in air of about 17 meters. A sound wave at 100 Hz – within the range of most male speech – has a length of just 3.4 meters.

Why FM is not used for long distance communication?

The very simplistic explanation is: lower frequency waves travel further because they can interact with (bounce off) the ionosphere under certain conditions, whereas frequencies above a few 10s of MHz cannot ‘bounce’ off the ionosphere.

Do low frequency waves carry longer distance than high frequency waves?

Low frequency wave not carry in “longer distance” than high frequency. But it may have less problem in propagate to things. Lower frequency wave tend to pass though bigger object with lesser absorb or reflect. So in this kind of situation, if the environment have many obstruct matter, lower frequency can travel farther than higher frequency

Why our speech signal is low frequency signal?

It is know that low frequency signals travel longer distance that of high frequency signal. If so, our speech signal is low frequency signal, why it is not travelling further? Stack Exchange Network

Why don’t we use low frequencies for modulation?

As per my knowledge, there are 3 reasons as to why we don’t use low frequencies for modulation. Humans can hear after 20Hz and even though we can’t hear below 20Hz, we can definitely feel it. So in the inaudible range we have only 0–20 Hz in the lows but post 20kHz there’s a lot more room.

Why do low frequency sounds travel better over hills?

An additional factor is that low frequency means long wavelength, and longer waves are diffracted more around edges, and this makes it possible for the low frequency sound to effectively curve over hills so that the sound can get places even though the source can’t be seen. The 4 Worst Blood Pressure Drugs.