Large sample rate or large number of cycles when estimating frequency?

1. Does sampling rate affect frequency?
2. Why is it important to set the sampling rate higher than the maximum frequency measured?
3. How do you choose a sampling rate based on frequency?
4. What happens when the sampling frequency is too high?

Does sampling rate affect frequency?

Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.

Why is it important to set the sampling rate higher than the maximum frequency measured?

If the signal contains high frequency components, we will need to sample at a higher rate to avoid losing information that is in the signal. In general, to preserve the full information in the signal, it is necessary to sample at twice the maximum frequency of the signal.

How do you choose a sampling rate based on frequency?

The Nyquist theorem – choosing the right sample rate

The Nyquist theorem is part of the fundamentals of signal conditioning. Based on that, you must choose the sample rate at least twice as high as the maximum frequency in the signal.

What happens when the sampling frequency is too high?

If the rate of samples is too high the system may not be able to process them fast enough - it runs out of processing time.