pistonphone造句

例句与造句

1. Dosimeter manufacturers recommend that the instrument be calibrated with an acoustical calibrator such as a pistonphone before and after each measurement to verify reliable operation.
2. AC electrical current could produce pressure variations in the " thermaphone . " Certain types of microphones were thus calibrated with the pistonphone and used as lab standards.
3. :See Microphone in the section " Measurement microphones . " 2oth century methods included the pistonphone, which mechanically moved a piston a known distance in a known space to create known pressure variations up to 250 Hz.
4. Since their output is also dependent on the volume of the chamber ( coupling volume ), differences in shape and load volume between different models of microphone will have an influence on the resulting SPL, requiring the pistonphone to be calibrated accordingly.
5. It's difficult to find pistonphone in a sentence. 用pistonphone造句挺难的