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Resonance Tube
Abstract
The purpose of this lab was to determine the frequencies of the sound produced by a tuning fork. This was accomplished by inducing resonance using a tube of adjustable length.
Theoretical Background
In practice, sound is heard if a tuning fork is set to vibrate. Typically, the sound comprises one or more frequencies. Notably, resonance may occur between the surface and the tuning fork in case sound is reflected from the surface. In essence, the sound is used to detect resonance. In addition, the difference between two resonances is a half-wavelength and can be expressed as follows: h2 – h1 = ƛ/2… Equation [1]
Equation [1] relates the difference between the two …show more content…
In other words, f list = 1024 Hz, 500 Hz
Q2b: These frequencies relate according to Equation [2].
Q2c: Slight variations were observed between the measured frequencies and those on the turning fork as well as the sound sensor measurements.
Q3: By definition, resonance is the prolongation or reinforcement of sound caused by synchronous vibration or reflection of sound from a surface of a nearby object. Resonation of air can be demonstrated with the aid of the following diagram: …show more content…
Specifically, it was possible to determine the frequency of sound produced by a turning fork. Evidently, a sound is a useful parameter for detection of resonance. Moreover, the frequency and wavelength of sound can be used to determine the velocity of sound across a medium. These quantities relate according to equation [2]. From the experiment, the air resonates in the tube or column. When the column is adjusted to the proper length, a sudden rise in the sound’s intensity occurs thus proving the resonance phenomenon. The length of the water column must be changed by either lowering or raising the level of water while holding the tuning fork over the open end of the tube. Overall, the lab proved that the standing wave phenomenon in a column of air (resonance) occurs when the length of the column is λ/4, 3λ/4, 5λ