The applications of echo: (i) Dolphins detect their enemy and obstacles by emitting the ultrasonic waves and hearing their echo. (ii) In medical science, the echo method of ultrasonic waves is used for imaging human organs such as the liver, gall bladder, etc. This is called ultrasonography.
What is echo and its applications?
Echoes are used by bats, dolphins and fisherman to detect an object / obstruction. They are also used in SONAR (Sound navigation and ranging) and RADAR(Radio detection and ranging) to detect an obstacle.
What is echo explain?
An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.But sounds are not always reflected.
What are the two applications of eco?
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What is an echo name 2 areas of its application?
An echo is defined as a sound that is produced when a sound wave is reflected back from any hard surface and repeated. Two major application of echo include: Bats, fisherman, and dolphins use echoes to detect or identify any object /obstruction.
What is echo write two applications echo?
The applications of echo: (i) Dolphins detect their enemy and obstacles by emitting the ultrasonic waves and hearing their echo. (ii) In medical science, the echo method of ultrasonic waves is used for imaging human organs such as the liver, gall bladder, etc.
How can Echoes be useful?
An echo is the sound you hear when you make a noise and the sound wave reflects off a distant object. Besides the novelty of hearing your words repeated, echoes can be used to estimate the distance of an object, its size, shape and velocity, as well as the velocity of sound itself.
What is echo Class 9?
An echo is sound which is repeated. This is because sound is reflected back. Example- If we stand on top of mountain and shout our name. We hear the repetition of our sound.
Which of the following is an application of echo sounding?
Echo sounding is a type of sonar used to determine the depth of water by transmitting acoustic waves into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time.
How echo is used by a fisherman?
By hearing the echo, they come to know the location of the obstacle and fly safely without colliding with it. By hearing their echo and emitting the ultrasonic waves dolphins detect their enemy and obstacle. They hunt their prey by using ultrasonic waves.Hence fisherman use echoes to catch fishes.
What are the applications of reflection of sound?
Following are the practical applications of reflection of sound waves are:
- Reflection of sound is used to measure the distance and speed of underwater objects.
- The working of a stethoscope is also based on the reflection of sound.
- The working of a hearing aid is based on the reflection of sound.
Where is echo used?
In computing, echo is a command that outputs the strings that are passed to it as arguments. It is a command available in various operating system shells and typically used in shell scripts and batch files to output status text to the screen or a computer file, or as a source part of a pipeline.
What is echo used for in PHP?
We can use ‘echo’ to output strings, numbers, variables, values, and results of expressions. Below are some usage of echo statement in PHP: Displaying Strings: We can simply use the keyword echo followed by the string to be displayed within quotes.
What does echolocation mean?
: a physiological process for locating distant or invisible objects (such as prey) by sound waves reflected back to the emitter (such as a bat) from the objects.
What is an echo Class 10?
Echo The sound heard after reflection from a distant obstacle (such as a cliff, a hillside, etc.) after the original sound has ceased, is called an echo. Reverberation If the distance is less than 17 m, then the original sound mixes with the reflected sound.
What is echo Ncert?
Echo. When we shout near a mountain, we will hear the same sound again and again with small time interval gaps. This is called an echo. Echoes may be heard more than once due to successive or multiple reflections.
What is an echo Class 8?
The echo: Sound heard after reflection from a surface is called echo. Just like heat or light, when sound falls on a surface, it is partly reflected and partly absorbed.
What is an echo sounder explain its working?
Echo sounder measures the depth of water by measuring the time for a pulse of energy to travel to the sea bed and back and work on the principle of reflection of acoustic energy. Short pulse of sound energy is transmitted vertically down from the ship.
How is echo sounding used to find the depth of the ocean?
depth finder, also called echo sounder, device used on ships to determine the depth of water by measuring the time it takes a sound (sonic pulse) produced just below the water surface to return, or echo, from the bottom of the body of water.
What does an echo sounder measure quizlet?
An echo sounder is used to determine depth of water by measuring time between transmission of acoustic waves and receiving reflected waves.
Why is ultrasonic waves used for sound ranging?
Ultrasonic Waves are used as they can penetrate deep in water without losing intensity. Because their frequency lies beyond the limits of audibility (20Hz20,000Hz). One of the application of the sound ranging is to locate the position of the object underwater and to find the depth of the sea.
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