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The sonar signals are audio wave signals created by the transmitter that can pass through water. When Radio signals are created in air it is called radar. Usually sonar are used in underwater applications, and navy defense.
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What is the differences of an active sonar and passive sonar?
Active sonar sends a signal out from a source and when it encounters an object the signal reflects back to the source. This can be detected by the object it is reflecting off of like a ship or submarine. Passive sonar is simply putting a microphone in the water and listening. It is also undectable.
What is the difference between Doppler and Sonar?
Doppler is the name given to the falling (or rising) note heard when a tonal signal approaches and then recedes.Sonar may or may not use Doppler as part of its signal, but essentially a Sonar system emits a sharp chirp of signal and times its return period as an indication of the distance.Cleverly enough, some moths have evolved so that when they detect a (bats) sonar ping, their flight muscles turn them away from the sonar chirp. This is a reflex, not a trained reaction.
Why is nthe speed of a sonar signal inwater with the frequency of 1000 hz and a wavelength of 1.5m?
The familiar formula for finding the speed of wave right from its frequency and wavelength is c = nu lambda. nu is the frequency and lambda is the wavelength. So in this case speed of sonar signal = 1000 x 1.5 = 1500 m/s.
What is active sonar?
A transponder makes a sound in the fluid, and the time it takes the return pulse to arrive allows one to determine distance, and the direction the return pulse comes from tells the direction to the reflecting surface. How it works is that, when a sound signal is sent into the water, part of it will be reflected back when it hits an object. The distance to the object can then be determined by measuring the time between when the signal was sent and when the echo is received. Active sonar differes from passive sonar because in passive sonar, the operator listens to sounds emitted by the object one is trying to locate. Passive sonar uses the sounds emitted by objects such as ships, submarines and creatures such as marine mammals and fish to determine their location
What is the meaning sonar?
sonar means '...of, or relating to sound'
Why is reflection of signal useful?
Reflection of a transmitted signal is the basic premise of radar and sonar.
What is the differences of an active sonar and passive sonar?
Active sonar sends a signal out from a source and when it encounters an object the signal reflects back to the source. This can be detected by the object it is reflecting off of like a ship or submarine. Passive sonar is simply putting a microphone in the water and listening. It is also undectable.
What is the difference between Doppler and Sonar?
Doppler is the name given to the falling (or rising) note heard when a tonal signal approaches and then recedes.Sonar may or may not use Doppler as part of its signal, but essentially a Sonar system emits a sharp chirp of signal and times its return period as an indication of the distance.Cleverly enough, some moths have evolved so that when they detect a (bats) sonar ping, their flight muscles turn them away from the sonar chirp. This is a reflex, not a trained reaction.
Why dsp in military applications?
DSP is also used in military. For Radar signal processing. For Sonar signal Processing. For Navigation and For Secure communications.
How is sonar used to tell differences?
High frequency sound waves hit objects which absorb or reflect the sound waves and then the waves bounce off the objects that reflect the signal (for example rocks on the ocean floor) and return to a sonar receiver. The difference is visible since there will be patches of unreturned signal in certain ares where the signal was absorbed (for example if the waves hit a whale, the blubber may very effectively absorb the signal leaving a blank patch of sonar screen in the shape of a whale)
Why is nthe speed of a sonar signal inwater with the frequency of 1000 hz and a wavelength of 1.5m?
The familiar formula for finding the speed of wave right from its frequency and wavelength is c = nu lambda. nu is the frequency and lambda is the wavelength. So in this case speed of sonar signal = 1000 x 1.5 = 1500 m/s.
What is depth of the ocean if a sonar signal takes 4 seconds to travel from a ship to the ocean floor and back?
Unfortunately the ship sank
How is sonar used for location?
It uses echo location for all underwater submarines and when the signal comes back you will be able to see whats in front of you.
What is active sonar?
A transponder makes a sound in the fluid, and the time it takes the return pulse to arrive allows one to determine distance, and the direction the return pulse comes from tells the direction to the reflecting surface. How it works is that, when a sound signal is sent into the water, part of it will be reflected back when it hits an object. The distance to the object can then be determined by measuring the time between when the signal was sent and when the echo is received. Active sonar differes from passive sonar because in passive sonar, the operator listens to sounds emitted by the object one is trying to locate. Passive sonar uses the sounds emitted by objects such as ships, submarines and creatures such as marine mammals and fish to determine their location
How can submarines detect other submarines under water?
The main method is through listening using passive Sonar. Active sonar sends out a sound signal that can be used to bounce off the enemy. It may also give away their own position.
What sense does the bat use to hunt?
The bats send out a signal, similar to a sonar. If they get the signal back to them, they know that there is something there, if the amount of time that it takes to get back is always changing, then they know that there is something living there, not an object, like a tree.
Which method of studying the ocean floors gives some degree of proximity but is efficient in terms of time as well?
sonar sonar sonar sonar SONAR
