10. Singing Blades of Grass Team of Richelieu Lyceum Kishmar Nickolas
Condition of a problem It is possible to produce a sound by blowing across a blade of a grass, a paper strip or similar. Investigate this effect.
A plan of a report 1) An experimental part 1. 1) An adjustment 1. 2) Discovery of dependence between the parameters of a system 1. 3) Derivation of the working formula 2) The theoretical part 2. 1) The study of the nature of a sound 2. 2) The study of the nature of the oscillatory motion
An adjustment
Processing of results in Audacity
Discovery of dependence between the parameters of a system (graphs included)
Craft paper F, H l, cm 0, 5 1 1, 5 2 2, 5 3 3 387 462 534 604 653 681 3, 5 317 370 441 520 544 589 4 265 315 343 447 474 518 4, 5 219 258 305 380 422 463 5 184 213 256 318 363 433 5, 5 164 184 210 276 336 403 6 146 165 183 243 297 390 6, 5 132 150 171 221 290 381 7 122 141 165 201 274 364
Notebook paper F, H l, cm 0, 5 1 1, 5 2 2, 5 3 3 242 274 356 493 521 555 3, 5 210 221 294 402 430 450 4 189 186 253 336 369 394 4, 5 168 170 224 283 304 345 5 153 156 196 247 278 304 5, 5 143 139 175 225 245 281 6 130 132 164 206 236 264 6, 5 119 125 150 194 225 252 7 108 121 142 183 218 243
The study of the dependence between the frequency of a sound a length of a strip Paper: Craft Force: 1 H Width: 1, 5 cm 500 450 400 350 300 250 200 150 100 50 0 0 1 2 3 4 5 6 7 8
The study of the dependence between the frequency of a sound a length of a strip Paper: Craft Force: 2, 5 H Width: 1, 5 cm 700 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 8
The study of the dependence between the frequency of a sound a length of a strip Paper: Notebook Force: 1 H Width: 1, 5 cm 300 250 200 150 100 50 0 0 1 2 3 4 5 6 7 8
The study of the dependence between the frequency of a sound a length of a strip Paper: Notebook Force: 2, 5 H Width: 1, 5 cm 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 8
conclusion:
The study of the dependence between the frequency of a sound a length of a strip Paper: Craft Force: 1 H Width: 1, 5 cm 600 500 400 300 200 100 0 0. 05 0. 10 0. 15 0. 20 0. 25 0. 30 0. 35 0. 40 0. 45 0. 50
The study of the dependence between the frequency of a sound a length of a strip Paper: Craft Force: 2, 5 H Width: 1, 5 cm 600 500 400 300 200 100 0 0. 05 0. 10 0. 15 0. 20 0. 25 0. 30 0. 35 0. 40 0. 45 0. 50
The study of the dependence between the frequency of a sound a length of a strip Paper: Notebook Force: 1 H Width: 1, 5 cm 600 500 400 300 200 100 0 0. 05 0. 10 0. 15 0. 20 0. 25 0. 30 0. 35 0. 40 0. 45 0. 50
The study of the dependence between the frequency of a sound a length of a strip Paper: Notebook Force: 2, 5 H Width: 1, 5 cm 600 500 400 300 200 100 0 0. 05 0. 10 0. 15 0. 20 0. 25 0. 30 0. 35 0. 40 0. 45 0. 50
conclusion:
The study of the dependence between the frequency of a sound a tension force Paper: Craft Length: 3 cm Width: 1, 5 cm 800 700 600 500 400 300 200 100 0 0 0. 5 1 1. 5 2 2. 5 3 3. 5
The study of the dependence between the frequency of a sound a tension force Paper: Craft Length: 6 cm Width: 1, 5 cm 350 300 250 200 150 100 50 0 0 0. 5 1 1. 5 2 2. 5 3 3. 5
The study of the dependence between the frequency of a sound a tension force Paper: Notebook Length: 3 cm Width: 1, 5 cm 600 500 400 300 200 100 0 0 0. 5 1 1. 5 2 2. 5 3 3. 5
The study of the dependence between the frequency of a sound a tension force Paper: Notebook Length: 6 cm Width: 1, 5 cm 300 250 200 150 100 50 0 0 0. 5 1 1. 5 2 2. 5 3 3. 5
conclusion:
The study of the dependence between the frequency of a sound a tension force Paper: Craft Length: 3 cm Width: 1, 5 cm 800 700 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 8 9 10
The study of the dependence between the frequency of a sound a tension force Paper: Craft Length: 6 cm Width: 1, 5 cm 450 400 350 300 250 200 150 100 50 0 0 1 2 3 4 5 6 7 8 9 10
The study of the dependence between the frequency of a sound a tension force Paper: Notebook Length: 3 cm Width: 1, 5 cm 700 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 8 9 10
The study of the dependence between the frequency of a sound a tension force Paper: Notebook Length: 6 cm Width: 1, 5 cm 300 250 200 150 100 50 0 0 1 2 3 4 5 6 7 8 9 10
conclusion:
The study of the dependence between the frequency of a sound a density of a paper conclusion:
Derivation of the working formula or or
The study of the nature of the oscillatory motion 1) 2) 3)
Conclusion We have studied the nature of the sound, as a problem’s statement required. We have found an interconnection between the parameters of the system and combined it into the working formula, that will allow us to predict a behavior of our system, if we know needed parameters.
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