| 词汇 | hertz |
| 释义 | hertz noun[ C ] uk /hɜːts/ us /hɝːts/pluralhertz(written abbreviationHz) a unit for measuring the number of cycles that happen every second, used especially in electronics赫兹（频率单位） See also kilohertz megahertz Miscellaneous units of measurement acre acreage caloric denier dioptre farad fathom firkin flashpoint joule MHz newton radian refractive index röntgen Scoville scale SI unit sievert sun protection factor watt You can also find related words, phrases, and synonyms in the topics: Electricity & electronics hertz | American Dictionaryhertz noun[ U ] us/hɜrts/(abbreviationHz) physics the standard unit for measuring the frequency (= the rate of repetition) of a wave . One hertz equals one repetition per second. Examples of hertzhertz Visual observations of the turbulent fluctuations suggested that a low frequency response flat down to 0.2 hertz would have been useful. This is virtually always the case for real-time simulations with refresh rates of several hundred hertz. Since the 1960s it was recognised that the alpha, beta and theta types have a link to different hertz levels that can be associated with different mental states. This frequency varies linearly with chemical concentration and will change by up to several hundred hertz when exposed to a strong concentration of the target chemical. It is not cost effective to convert a complete railway system to the standard of 25,000 volts at 50 hertz, which is the preferred methodology nowadays. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 This jet of gas occurs for a very brief duration, about 0.02 seconds, and at high frequency: 4-11 hertz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. High-frequency (typically 20,000 hertz) ultrasonic vibrations are locally applied to metal foil materials, held together under pressure, to create a solid-state weld. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since the numerator is usually in hertz, and the denominator in megahertz, delta is expressed in ppm. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The transducers were temporarily altered for this test to transmit sound at 50 hertz, which is lower than their normal operating frequency. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A 1200 hertz amplitude modulated sine wave is pressed into the left and right channels with a phase difference of 90 degrees. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The signal falls off exponentially as a function of frequency, so frequencies around 1-10 hertz are frequently used. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The audible range of sound is 20 hertz-20 kilohertz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When variable "x" has units of seconds, "f" has units of hertz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The rate at which the air pressure oscillates is the frequency of the tone, which is measured in oscillations per second, called hertz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In general small analytes have megahertz frequencies while larger analytes can be only a few hundred hertz. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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