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Depends on the quality of the sound. The minimum distance to hear an echo will be partly based upon the observers ability to resolve different sounds (i.e. so that they can distinguish between the actual noise, and the arrival of the reflected sound - a little 100 year old lady may not be as good as a 15year old!). This will vary between observers, as their auditory reaction times vary
In the perfect Physics world though:
Assuming a sharp sound (like a gunshot) the minimum distance (d=vt) to hear distinct echo is 17.2m considering the speed of sound to be 344ms.
In general the "minimum echo distance" is always equal to half a wavelength from the reflector.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThere is no minimum distance to produce an echo. The question is going to be how far it needs to be in order for human ears to distinguish the echo from the original noise. And that answer varies from one person to another. Some blind people for instance use echos to discern how close they are to walls and other objects.
Wiki User
∙ 13y ago16.5 meter
Wiki User
∙ 14y ago55 feet
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In a stationary fluoroscopy machine the minimum distance acceptable between patient and fluoroscopy tube should be what?
The minimum source-to-skin distance distance for a fixed fluoroscopy unit is 15 inches. For a portable x-ray machine, the minimum distance is 12 inches.
What is a common name for the reflection of sound waves?
Echo.
What is an antonym of echo?
unreflected
What are the importance of echo?
· An echo is a reflection of sound waves when they hit upon any obstacle in their path. · This property of sound is employed by many animals,birds,insects and of course,humans.Bats are the most famous ones to use echo for catching food. · The property echo is extensively used by submarines and undersea explorations.
The bouncing of a sound wave off a surface?
The bouncing of a sound wave off a surface may result in an echo being heard.
What is the minimum distance required to produce a distinct echo in meter?
17.2m
What is the minimum distance of echo?
Depends on the quality of the sound. The minimum distance to hear an echo will be partly based upon the observers ability to resolve different sounds (i.e. so that they can distinguish between the actual noise, and the arrival of the reflected sound - a little 100 year old lady may not be as good as a 15year old!). This will vary between observers, as their auditory reaction times vary In the perfect Physics world though: Assuming a sharp sound (like a gunshot) the minimum distance (d=vt) to hear distinct echo is 17.2m considering the speed of sound to be 344ms. In general the "minimum echo distance" is always equal to half a wavelength from the reflector.
Why the echo of a sound made by us is not heard in small room?
because the minimum distance between the us (the source) and the reflector should be 16.5 cm.
What is the minimum distance of the obstacle from the source to hear an echo?
About 17 meters.It may slightly changes with speed of sound.this is because sound resumes in ear for 0.1s.
What is echo define and explain with examples?
Echo is a delay of sound - it comes at a slower rate and appears to echo. Often distance is a major factor of echo.
Describe ways that echoes are used in measurement?
The speed of sound is the distance travelled by the sound waves in the time between the original sound and the echo. For a direct echo, the distance travelled is double the distance to the reflecting surface.
What is echo and its application?
echo is nothing but the reflection of sound and it is used to find the distance of certain places like mountains and buildings.
What is the minimum distance allowed near open trenches when travelling a crane and why?
The minimum distance is the depth of the excavation...
What is the minimum seconds of following distance?
When following large trucks, maintain at least a minimum of a ______ second following distance.
Is there a rule of distance of school from billiard halls?
In the US there is no minimum distance. However, a local municipality can require a minimum distance by local code or ordinance.
Why do you not get echo at all places?
we do not get echo at all the places because everywhere there cannot be the distance of 17.2m b/w the source of sound and the object.
Minimum distance below sink to trap?
What is the minimum distance between the bottom of a sink and the trap attachment for a bathroom sink
