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The frequencies on which sonar is used vary widely. Human hearing is usually cited as ranging as from 20 cycles per second (Hertz) to 20,000 cycles per second. There are many sonars that use frequencies in the 20 to 20,000 Hertz range. In general, the sonars that are used for short range underwater applications operate on a slightly higher frequency than those that are designed to look over long distances. But there are a lot of sonars which use frequencies far outside the range of human hearing. Medical imaging is the most popular use of sonar. The range of frequencies used by these devices range from 2 million cycles per second to 18 million cycles per second. These frequencies are far above what humans can hear.
What else can I help you with?
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
What is ultrasound?
Ultrasound is sound which has a frequency higher than that of audible sound.( like radar )ADDED: Not like radar. That uses radio waves, although sonar and radar principles are similar.
What can Differences in ocean-surface height can be measured by?
Sonar
How do you measure the depth of a undersea wreck?
With sonar
What is the chance of accurate underwater sonar imaging?
Very high. Not sure you can express it as a probability question though. The actual definition depends on various factors including frequency (wavelength), scanner geometry and performance, scanning speed and geometry, the image-processing, water depth, scattering and absorption, nature of the objects being scanned, etc., but sonar performance is increasing all the time as the manufacturers all seek to produce better instruments than their rivals!
Why do narwhals communicate?
because they have high frequency sonar pings
What are related words for ultrasonic?
Sonar, ultrasound, high-frequency sound.
What is the wavelength of sonar?
The wavelength of sonar waves can vary depending on the frequency of the sound waves being emitted. In general, the wavelength of sonar used in underwater applications ranges from a few centimeters to several meters. The selection of the frequency and corresponding wavelength is based on the specific requirements of the sonar system and the properties of the underwater environment being explored.
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 does LFAS stand for?
Low Frequency Active Sonar
What are the three parameters of sound that can be measured by the SONAR?
Return timeAmplitudeDoppler frequency shift
How was a diver killed by sonar technology?
A diver was killed by sonar technology when the high-frequency sound waves emitted by the sonar system caused internal injuries and disorientation, leading to a fatal accident underwater.
What difference does frequency have in sonar?
Frequency in sonar refers to the number of sound waves emitted per second. Higher frequencies provide better resolution and detail in detecting objects, but have shorter range and are absorbed more easily by water. Lower frequencies can travel long distances underwater, but have poorer resolution. The choice of frequency in sonar depends on the specific application and desired trade-offs.
Can you hear the sound produced by sonar devices?
Sonar devices emit sound waves at frequencies that are typically beyond the range of human hearing, especially in the case of high-frequency sonar used for detailed imaging. However, some low-frequency sonar sounds can be audible to humans, particularly in certain conditions. The effectiveness of sonar relies on the reflection of these sound waves off objects underwater, which is then processed to provide information about the environment. Thus, while some sonar sounds may be heard, most are not audible to the human ear.
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.
Bearing resolution of a sonar?
Bearing resolution in sonar refers to the ability to distinguish between two closely spaced objects in terms of their direction relative to the sonar transducer. It depends on factors like the beamwidth, signal processing techniques, and the frequency of the sonar system. Higher bearing resolution allows for better target discrimination and localization.
What are some negative effects of sonar?
Some negative effects of sonar are that marine animals like whales and dolphins are being effected and not being able to use their sonar very well. It is proven that the reason whales "beach" is because the tests of low-frequency sonar's mess up the hearing of whales and make them lose their sense of direction.
