20 Hz clean sine wave BASS TEST TONE frequency SupernaturalMusic 3:02 7 years ago 76 239 Скачать Далее
20 - 20,000 Hz Audio Sweep | Range of Human Hearing Sonic Electronix 0:36 8 years ago 5 353 471 Скачать Далее
20Hz to 20kHz Frequency Sweep (Logarithmic) 1080p HD Aaron Shannon 0:41 9 years ago 273 448 Скачать Далее
Subwoofer Break-In Frequency Sweep 40hz-20hz (50min) Bass Test SimteR Productions 50:55 6 years ago 210 668 Скачать Далее
20-200 Hz. Frequency Sweep. Human Audio Spectrum. Hearing test. Bass test. Pure tone All Movie Tube 1:32 5 years ago 303 159 Скачать Далее