Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
SHScienceExam1
| Question | Answer |
|---|---|
| Sound | An audible disturbance in a medium. It is created by changes in pressure in a gas, liquid, or solid |
| Acoustics | the study of sound |
| Pressure | Force that acts perpendicular on a surface |
| Ambient Pressure | Pam- the constant pressure in a given environment |
| Two systems of measurement used to measure sound pressure | TWO SYSTEMS: MKS measurs force in Newtons/Meters2 (Meter Kilogram Second) CGS- measures force in dyne/cm2 (Centimeter Gram Second) |
| What is a spirometer? What does it measure? | a device to measure the amount of force required for moving a column of h20. |
| Minimum pressure required for making the smallest speech sound | 3-5 cm H20 |
| pressure required for average conversation speech | 7-10 cm H20 |
| From what direction to what direction does air move? | From high areas of pressure to low areas of pressure. |
| laminar flow | the flow of air molecules in a smooth and parallel manner at the same speed |
| Turbulent flow | the disturbed irregular flow of air due to barrier or obstruction |
| Volume | amount of space occupied in three dimensions |
| volume velocity | the speed of a volume of air in traveling in a certain direction |
| density | the amount of mass per unit of volume (more density -> more weight) |
| Boyles Law | as the volume of a particular enclosed space increases, the pressure becomes less |
| Compression | area of positive pressure |
| Rarefaction | area of negative pressure |
| Interaction of compression and rarefaction | when air molecules are disturbed they approach each other and collide, compression is created near the disturbance, and then immediately followed by a decrease in pressure (rarefaction) |
| Hooke's Law | Elasticity is proportional to the distance of displacement and acts in the opposite direction. The further an object is displaced, the stronger the restoring force that pulls it back to its original position. |
| Harmonic motion | ----ask someone |
| Amplitude | amount of displacement of an object from its rest position |
| Damping | decrease in amplitude |
| How sound is generated(first 2 steps) | 1. pressure is disturbed and is caused in increase and decrease in a systematic manner 2. the pressure changes occur spherically |
| How sound is generated(last 3 steps) | 3. air molecules displaced around their rest positions 4. disturbance produced rarefaction and compression spherically 5. amplitude decreases as it gets farther from the source |
| sound Wave | a pressure wave consisting of several cycles of vibration |
| waveform | shows the following: vibrations per second, amplitude of displacement, wavelength |
| cycle | one back and forth movement of a molecule |
| period | time each cycle takes |
| frequency | number of cycles per second |
| difference between cycle and period | cycle - one back and forth movement period - time of that back and forth movement |
| relationship between frequency and period | frequency - number of complete cycles that occurs in a certain time period period - time that one cycle takes |
| How do you calculate period when you are given the frequency? Vice versa? | P = 1/F F= 1/P |
Created by:
1239270111
Popular Speech Therapy sets