0
Why is nthe speed of a sonar signal inwater with the frequency of 1000 hz and a wavelength of 1.5m?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
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.
What is sonar signal?
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.
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'
What is the speed of a sonar signal in water with a frequency of 1000Hz and a wave length of 1.5 meter?
You can use the formula v=fλ where v is velocity (speed), f is frequency, and λ is the wavelength. Thus, you get v=(1000Hz)(1.5m) --> v=1500m/s
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 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.
Why do narwhals communicate?
because they have high frequency sonar pings
What is the maximum frequency of a sonar before it effects wildlife?
The freqeuncy (or pitch) of the sonar is not generally the factor which is likely to effect wildlife, but the amplitude (how loud it is).
What are the three parameters of sound that can be measured by the SONAR?
Return timeAmplitudeDoppler frequency shift
What does LFAS stand for?
Low Frequency Active Sonar
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.
What is sonar signal?
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.
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.
Are pink dolphins and submarines the same because they use the same sonar?
Though they both use SONAR (SOund Navigation And Ranging) to navigate, submarines and marine mammals that use sonar are both very different in how they use it.Marine mammal sonar uses a much higher frequency than submarine active sonar systems transmit at. Also, submarines rarely use active sonar due to the fact it immediately gives away your location and range to an enemy. Marine mammals use their active sonar constantly to navigate through the water, communicate, and to find food, while passive sonar is the primary means of submarine navigation.Dolphin sonar sounds like a fast clicking sound, with occasional high frequency "squeals", similar to a dog toy, though at a much higher frequency range. The frequency is high enough that it must be demodulated by special equipment to a lower frequency to really hear it. Usually when submarines go to periscope depth, dolphins set off the torpedo warning alarms since their frequency is at a similar range. As a former Submarine Sonarman, I can also say that it also drives you nuts, especially when there's a whole group of them around the boat.
