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

# Carnegie Physics 1

### Basics/Intro to Sound

Term | Definition |
---|---|

Measurement of Wavelength | milimeters |

Measurement of Propagation Speed | meters/sec |

Measurement of Frequency | Hertz |

Measurement of Period | Seconds (time) |

Measurement of Intensity | Watts/cm^2 |

Measurement of Power | Watts |

Is Frequency and Period Direct, Inverse or Unrelated? | Inverse |

Is wavelength and velocity direct, inverse or unrelated? | Direct |

Is amplitude and intensity direct, inverse or unrelated? | Direct |

is frequency and depth of penetration direct, inverse or unrelated? | Inverse |

Is crystal thickness and amplitude direct, inverse or unrelated? | Unrelated |

Is voltage to crystal and period of wave direct, inverse or unrelated? | Unrelated |

Is propagation speed and density of medium direct, inverse or unrelated? | Inverse |

Is frequency direct, inverse or unrelated to wavelength? | inverse |

is frequency direct, inverse or unrelated to crystal thickness? | inverse |

What is wavelength? | Distance/length of one complete cycle |

What is the typical value of wavelength? | 0.15-1.8mm |

True or False; Wavelength can be adjusted by operator | False |

What is intensity? | Concentration of energy in a sound beam. Depends on both power in the beam and area over which the power is supplied. |

What are the typical values of intensity? | 0.01-300 W/cm^2 |

True or False; Intensity can be adjusted by the operator | True |

What is power? | The rate of energy transfer or rate at which work is performed. "Bigness of wave" |

What are the typical values of power? | 4-90 miliwatts |

True or False; Power can be adjusted by the operator | True |

What is amplitude? | The difference between the minimum value and the average value of the acoustic variable. "Bigness of wave" |

What are the typical values of amplitude? | 1 million-3 million pascals (1-3 MPa) |

Can amplitude be adjusted by the operator? | Yes |

What is frequency? | Number of cycles that occur in one second |

What are the typical values of frequency? | 2 MHz - 10MHz |

Can frequency be adjusted by the operator? | No |

What is a Period? | The time from the start of a cycle to the start of the next cycle |

What are the typical values of a Period? | 0.1-0.5 microseconds |

Can the Period be adjusted by the operator? | No |

What is propagation speed? | The distance that a sound wave travels though a medium in 1 second |

What is the typical value of propagation speed? | 1.54 x10^3 |

Can propagation speed be adjusted by the operator? | No |

True or False; Propagation speed decreases as frequency increases | False, unrelated |

True or Flase; Wavelength can be described as Long or Short | True |

Sound waves are; | Longitudinal and Mechanical |

What term describes the properties of the medium that affect the wave? | Acoustic Variables |

The area of highest density in a wave occurs where? | Compression |

Pressure is measured in what? | Pascal |

The inverse of frequency is what? | Period |

The alignment of positive and negative charges in a piezoelectric crystal is call what? | Dipole |

Where is the compression phase on a sine wave? | Crest |

Where is the rarefaction phase on a sine wave? | Trough |

True or False; Amplitude increases as it travels through a medium | False, decreases |

Electronic device for converting one form of energy into another is a what? | Transducer |

Absorption is the loss of ultrasound intensity in what form? | Heat |

Where odes the piezoelectric effect occur? | Transducer |

Created by:
ICVT55