Taajuusnäyte

Taajuusnäyte, often translated as frequency sample or sampling frequency, refers to the number of samples of audio carried or recorded each second. In simpler terms, it's how often an analog signal is measured and converted into digital data. A higher taajuusnäyte means more data points are captured per second, which generally leads to a more accurate representation of the original sound. The standard taajuusnäyte for CDs is 44.1 kHz, meaning the audio is sampled 44,100 times per second. Telephony typically uses a much lower taajuusnäyte of 8 kHz. Higher taajuusnäyte values are often found in professional audio recording and high-fidelity audio formats, allowing for the capture of a wider range of frequencies. The Nyquist-Shannon sampling theorem states that to perfectly reconstruct a signal, the sampling frequency must be at least twice the highest frequency present in the signal. Therefore, a higher taajuusnäyte is crucial for accurately capturing high-frequency sounds. The choice of taajuusnäyte depends on the intended application and the desired quality of the audio reproduction.