"Physics Material" Definition of intensity & (Formula - Sound Intensity Level - Application of Sound Waves)
For a discussion of physical material which includes things such as the definition of intensity, formulas, sound intensity levels and the application of sound waves, in order to better understand the review below.
Definition of Intensity
In this case the word intensity is defined as the energy transferred in each unit of time and not a unit of area, and it is known that the energy of each unit of time is the understanding of power, then the intensity can also be said to be the power of each unit of area. So that the intensity can be formulated mathematically is as below:
"Physics Material" Definition of intensity & (Formulas - Sound Level Intensity - Application of Sound Waves)
I = P / A
Known:
I = Sound intensity (W / m2)
P = Energy every time or power (W)
A = Area (m2)
If isotropic or better known by the source of the sound that emits the sound in all directions the same magnitude.
The area being addressed has a similarity in the surface area of a ball. So that the equation on intensity can be written like:
I = P / 4πR2
Sound Intensity Level
The sound intensity level is a logarithm that compares the sound intensity with the threshold intensity. So the level of sound intensity can be formulated mathematically is as below:
TI = 10 log l / l
Known:
TI = Sound intensity level (dB)
I = Sound intensity (W / m2)
lo = intensity of human hearing threshold (10˄-12 W / m2)
And for example n pieces at the sound source such as there are n sirens that are turned on simultaneously, then the level of intensity of the sound can be written with:
Tln = Tl1 + 10 log n
If you hear at two different points of distance, the amount of sound intensity at the second point can be written with:
TI = Tl1 + 20 log (RA / RB)
Application of Sound Waves
Utilization of ultrasonic waves is very much for various purposes and needs such as:
To measure the depth of the sea.
In glasses, especially blind glasses (there is a sending device and an ultarsonic receiver).
In medical devices such as ultrasonography (USG).
Benefits of Fast Sound Creeping
The benefits and functions of sound propagation in daily life are as follows:
At this fast sound wave propagation can be used by fishermen to be able to know the time of day and night.
At night, the sound will be more clearly heard than during the daytime, and this is because the air density that occurs at night is denser than during the daytime.
Benefits of Resonation
The benefits of resonance in everyday life are as in musical instruments as follows:
Drum
Beduk
Flute and others
Benefits of Sound Reflection
The benefits of sound reflection in everyday life are as follows:
Detect layers in rocks containing oil deposits.
Can also determine the level of depth at sea ie on a ship's wall which is precisely at the bottom of the ship can be installed an oscillator or vibration source device and near the vibration source is also installed a device that can receive vibrations or hydrophones.
Can conduct geophysical surveys such as determining a location, detecting and classifying disturbances that occur on earth or referred to by being able to inform structures on earth.
And also the principle of ultrasonic reflection can be used to regulate the thickness level of the metal plate and can also detect cracks that occur in metal structures.
Thus the discussion about the "Physics Material" Definition of intensity & (Formulas - Sound Intensity Level - Application of Sound Waves) hopefully with this review can add insight and knowledge of you all, thank you very much for your visit.