免费频率计算器
根据周期或波速和波长计算频率。
m/s
m
频率
439.74 Hz
周期0.002274 s
Frequency vs Wave Speed
公式
## Frequency Frequency is the number of complete wave cycles passing a point per second. ### Formula **f = v / lambda** The reciprocal of frequency is the period: **T = 1 / f = lambda / v**.
计算示例
Sound traveling at 343 m/s with a wavelength of 0.78 m.
- 01f = v / lambda
- 02f = 343 / 0.78
- 03f = 439.7 Hz
- 04T = 1 / f = 0.002274 s
常见问题
What is the audible frequency range for humans?
Roughly 20 Hz to 20,000 Hz. Frequencies below 20 Hz are infrasound; above 20 kHz are ultrasound.
How does frequency relate to pitch?
Higher frequency corresponds to higher perceived pitch. Doubling the frequency raises the pitch by one octave.
Can frequency change as a wave moves between media?
No. Frequency stays constant when a wave passes from one medium to another; it is the wavelength and speed that change.
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