| 单词 | amplify sound |
| 释义 | amplify sound Sound energy causes changes in the shape of these cells, which serves to amplify sound vibrations in a frequency specific manner. Retrieved from Wikipedia CC BY-SA 3.0 The abdominal tracheal air sacs surround the sound muscles and extend into the abdomen, acting as resonant chambers to amplify sound. Retrieved from Wikipedia CC BY-SA 3.0 Modern experiments have indicated that their effect would have been to absorb the resonance of certain frequencies, rather than to amplify sound. Retrieved from Wikipedia CC BY-SA 3.0 The carbon transmitter was used to amplify sound by taking a weak signal and using electric current to make it a strong signal. Retrieved from Wikipedia CC BY-SA 3.0 Built-in microphones amplify sounds from under the house; a dining table can be 'played' like a xylophone; and a mirrored staircase makes a different sound with each step. Times, Sunday Times |
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