Click here to download the catalog as a PDF file. To view this site you need Adobe Flash Player and your browser must allow javaScripts. Go here to get the latest Flash Player. Sound & Waves Tuning Forks Our precision-tooled aluminum forks won’t rust or tarnish, so they’ll last for years. You can choose from the forks listed below. Or order the complete set of eight which comes with a rubber hammer and a soft protective case for easy storage. We also have a set of two forks, 255 Hz and 256 Hz, to demonstrate beat phenomena. Order the complete set or choose individual forks from the list below. 256 Hz–note C P7-5100 $8.25 Students can actually see the motion of this tuning fork 384 Hz–note G P7-5200 $8.25 426.7 Hz–note A P7-5300 $8.25 480 Hz–note B P7-9000 $8.25 512 Hz–note C P7-8000 $8.25 Set of 8 (All listed at left plus hammer & protective case) P7-5000 $75 255 Hz & 256 Hz set P7-7000 $16 288 Hz–note D P7-5400 $8.25 320 Hz–note E P7-5500 $8.25 341.3 Hz–note F P7-5600 $8.25 Sympathetic Tuning Fork Set An ingeniously simple way to demonstrate resonance and beats NEW! Low Frequency Tuning Fork New! Low-frequency tuning forks vibrate so slowly that the motion is plainly visible to the human eye. P7-5700 Low Frequency 100 Hz Tuning Fork $8.95 Set includes two “C” 256 Hz tuning forks, one fixed and one adjustable, each mounted on a wooden resonance box. A mallet is included. Match the frequencies to show sympathetic resonance. Move the slider to create a slight frequency difference, and demonstrate beats that the whole class can hear! P7-6000 Sympathetic Tuning Fork Set $129 SUBSCRIBE TO CoolStuff! www.arborsci.com Subscribe to the CoolStuff newsletter at ! n u F s I e c Scien Talkie Tapes Attach this simple plastic strip to any object, like a cup or a balloon, rub it with your thumbnail and hear it talk! Tiny bumps on the tape cause vibrations that mimic a human voice saying, “Science is Fun!” P7-7320 Talkie Tapes, 30/pk. $16 Great for hands-on student demonstrations of transverse and longitudinal waves. Helical Spring; “Snaky” 2 cm diameter, 180 cm long (collapsed) helical spring, ideal for demonstrating fundamentals of wave theory, including transverse and longitudinal waves and wave behavior at the interface of two media. Use with Super Springy (33-0130, p. 29) for a complete waves lesson. 33-0140 Helical Spring $16 Turn your whole chalkboard into a speaker! This music box mechanism is quiet on its own, but just hold it against a large object (table, chalkboard, window, paper cone, drum) and hear a dramatic increase in volume! It’s a simple, but memorable, demonstration of how sound propagates through vibrations and how sound energy travels. P7-7330 Music Box Mechanism $15 6 or more $13 28 1-800-367-6695