| 摘要 |
The pitch/tension device is a device to determine the tension, in pounds, in a taut string or strings, such as a tennis racket. There are two methods of determining the tension. In the first method, the pitch/tension device is first adjusted for racket type or size, and string gauge. The racket is then plucked, or otherwise sound, and the audio pitch emanating from the pitch/tension device is adjusted to approximate the pitch of the racket, wherein the tension of the racket is displayed. In the second method, the known racket tension at some previous time, such as at restringing, is set into the pitch/tension device as follows: the racket is plucked, or otherwise sounded, the tone emanating from the pitch/tension device is brought into agreement with the pitch of the plucked strings, the display is adjusted to agree with the known racket tension, and this setting is recorded. The present racket tension is determined by adjusting the pitch/tension device to this setting, plucking the strings, bringing the tone emanating from the pitch/tension device into agreement with the pitch of the plucked strings, and reading the tension on the display.
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