250 Hertz Centered Narrowband Random Noise At A -6 dB ... 250 Hertz Sine Wave At A -3 dB Level 250 Hertz Sine Wave At A -6 dB Level 250 Hosanna, Zoon van David 250 Hours 250 Hz 250 Hz & 8020 Hz ( - 10 DB) 250 Hz (-10db) 250 Hz (20 sec) 250 Hz + 8020 Hz -10 dB L& R 250 Hz + 8020 Hz 0 dB L Intermodulation Distortion 250 Hz ... 250 Hz + 8020 Hz 0 dB R 250 Hz -14 dBFS 250 Hz -6 dB 250 Hz 3rd octave wide warble tone 250 Hz one octive warble 250 Hz Sine Wave 250 Hz Sinus 0dB 250 Hz Stereo in-phase Sine Wave 250 Hz Stereo out-of-phase Sine Wave 250 Hz, - 10 dB 250 Hz, -10 dB 250 Hz, -10dB 250 Hz, -20 dB 250 Hz, -20dB