Sound frequency
Introduction The signal frequency is the "pitch" of the sound. Some facts about sound frequencies you might encounter in a pub quiz... Typically, male voices range from 85 to 180 Hz and female voices from 165 to 255 Hz . Humans can easily hear the sound frequency up to 8,000 Hz and lose abilities to hear sounds beyond that frequency through age. The music note C is 261.63 Hz and E 329.63 Hz. The Python notebook is a convenient playground to generate sounds of those frequencies and listen to the sounds. https://github.com/yasumori/blog/blob/main/2025/2025_12_21_signal2.ipynb . An example code snipet to generate a 2,000 Hz sound is also below: import numpy as np from IPython import display def gen_audio(frequency, duration, sample_rate): t = np.linspace(0, duration, duration * sample_rate) return np.sin(2 * np.pi * frequency * t) hz_2000 = gen_audio(2000, 3, 44100) disp...