Run a convenient 20 Hz to 20 kHz frequency sweep with a free online tone generator for speakers, headphones, and room testing. The 15-second logarithmic sweep moves across the audible spectrum to help identify noticeable peaks, dips, and resonances. You can also generate individual frequencies, select sine, square, sawtooth, or triangle waveforms, adjust volume, and test stereo or sep... https://aitoolspros.com/tools/audio/tone-generator/