Acoustics
Holmarc's Kundt's tube apparatus (Model No: HO-ED-A-02) is a device for measuring the speed of sound. Any waves traveling along the medium will reflect back when they reach the end creating a standing wave allowing harmonics to be identified. Nodes occur at fixed ends and antinodes at open ends. Furthermore, it provides an insight into the interesting phenomenon of standing sound waves.
In this experiment the amplitude of the sound wave can be observed at different locations in the tube, allowing a half wave length to be measured between an adjacent maximum and minimum.
Here, one-side closed cylindrical transparent pipe filled with air is used as a resonator. One end of the tube is attached with a loudspeaker where as the other end is fixed with a movable piston with reflector and a microphone. An AC voltage applied to the loudspeaker, tunes the membrane to vibrations that are transferred to the gas or air column. Frequency can be changed by enlargement or diminishment of the glass cylinder as well as by changing the frequency of the generator.
Experiment
To find the velocity of sound in air with the help of head phone
The velocity of the wave is,
V = ʋ λ
Where υ is the frequency and λ is the wavelength in the case of longitudinal waves, the wavelength is the difference between two consecutive compressions or rarefactions.
To find the velocity of sound in air using Lissajous Figures
A sine wave from an audio oscillator and the signal picked up by a movable microphone to produce Lissajous figures and determine the speed of sound.
Scope of Supply
Model No: ED-A-02-KTGS
Material : PMMA
Length : 1000 mm
Diameter : 60 mm
Quantity : 1 no.
Model No: ED-A-02-SSC
Quantity : 1 no.
Model No: ED-A-02-MP
Quantity : 1 no.
Model No: ED-A-02-HP
Quantity : 1 no.
Model No: ED-A-02-SP
Quantity : 2 nos.
Model No: ED-A-02-KTCU
Quantity : 1no. each
Allen keys
CRO (optional)
Instruction Manual
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ
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