Physics
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Waves & Sound
Tuning Forks, Set of 2
The forks have threaded shanks and will screw in the box tops. The frequency of each is A (426). One fork is fitted with a sliding mass to alter its frequency. On sounding both forks, a clear, beat is produced. Supplied with one hammer. Size of box 180 x 88 x 53 mm approx.
PH36137 -
Waves & Sound
Tuning Forks, Set of 2, Superior
Set of two resonance boxes with extra heavy aluminium forks having double the duration of audible vibration than the ordinary forks. One fork is weighted and can be adjusted over range of about 30 Hz. forks are of different lengths 19.4 cm and 17.5 cm approx.
PH36140 -
Waves & Sound
Tuning Fork, Electrically Maintained
On sturdy base, can be used in horizontal or vertical position. Prong size is 300 x 25 x 10 mm. Actuated by an electromagnet between the prongs, works with 6 V D.C. Amplitude of vibration can be varied by adjusting the position of the electromagnet.
PH36145 -
Waves & Sound
Melde’s Apparatus
Improved type, to show effects of vibrations in a stretched cord and to investigate relation between frequency, tension and density. Comprising an adjustable length of thin steel rod mounted in a pair of socket terminals near one end and passing through an A.C. energising coil and a permanent magnet. The other end of the wire has a small boss with clamping screw for attaching to cord. Two adjustable contacts are also fixed on either side of the armature connected to terminal sockets to provide a quick changeover switch in capacitor charge/discharge experiments etc.
Required for experiment (not included): Balance Mass Set, Physical (CH10038).
PH36148 -
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Waves & Sound
Velocity of Sound Apparatus
This dual purpose apparatus provides a compact facility for the measurement of the velocity of sound in air and also for the analysis of standing waves. It requires an audio signal generator and a dual beam oscilloscope (not included). A phase measurement between the speaker and microphone signals is made on an oscilloscope. The distance required to traverse through a 360° phase shift is noted. Knowing the frequency and distance, the speed of sound is computed. With the reflector in place a standing wave can be generated. Nodes and antinodes can easily be seen from the amplitude variations on the CRO.
PH36165 -
Waves & Sound
Tuning Fork Wave Recorder
Apparatus to show the waves of a tuning fork, change of waves with the frequency of tuning fork. Also demonstrates characteristics of waves and sound visually. It consists of three different type of tuning forks, marker and a paper role. Mounted on wooden stand. With instructions.
PH36168 -
Waves & Sound
Resonance Apparatus, Simple Form
For measuring the resonant length of an air column driven by a tuning fork. Comprises a brass tube 292 x 25.4 mm diameter fixed to a base with a sliding inner tube 305 mm long which allows the length of the air column to be varied from 350 to 530 mm.
PH36178 -
Waves & Sound
Resonance Apparatus
Investigate the length, frequency and velocity of sound waves by studying the resonance of air columns. In the experiment, described below, you will use the wave equation (v = λf) to measure the speed (v) of sound; here (f) is the frequency and (λ) is the wavelength. A vibrating tuning fork, held over the top of the graduated water cylinder, will begin to resonate with the air column above the water in the cylinder. After taking the measurements of the air column and the tuning fork, the speed of sound can be calculated.
PH36178P -
Waves & Sound
Resonance Apparatus
A resonance apparatus is used to locate the resonance positions in air columns. From these resonance positions, it is possible to calculate the speed of sound using the water level and the frequency of the tuning fork used. Apparatus consists of a chrome plated brass resonance tube 100 cm long, a reservoir 250 ml, a meter scale mounted on a stand and rubber tubing.
PH36187 -
Waves & Sound
Tooth Tunes Kit
A Hands-on kit that teaches the principles of sound induction/conduction. When students bite on the wooden rod, the frequencies of the attached audio signal, from a radio, is then transmitted from their teeth to their ears. Includes activity material for five students and an instruction manual.
PH36197 -
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Waves & Sound
Vibration Generator
To produce mechanical vibrations when used with a signal generator. The input is fed to a coil, which is mounted within the field of a cylindrical permanent magnet. The unit is mounted on a strong base and is enclosed in a plastic case. The coil and magnet assembly are protected from the entry of foreign particles. A threaded extension of the armature allows attachment of the item to be vibrated, e.g., plates for chladni’s figure experiments. A specially designed coil system enables the unit to be operated at its maximum rating for a prolonged period without any damage due to overheating. Electrical input via a pair of 4mm shielded sockets and oscillating mechanical output is available through a shaft at the top. A locking arrangement provides safety to the apparatus during storage or transportation by blocking the motion of shaft. The unit is electrically secured by means of a fuse. Avoid long periods of sustained rapid vibration and keep dry as moisture will damage the mechanism.
PH36214
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