Question

1. What reference pressure would be required for a 0 dB sound to represent "true" silence ?  
2. The frequencies at which the vocal tract "filter" permits maximum energy transfer are called ? They will appear on a wide band spectrogram as ?
3. The Intensity Level (IL) of a sound having a value of 1 x 10-15 W/cm2 is ____ dB relative to the standard reference.  
4. A sound reaching a sound level meter is 0.0001 dynes/cm2. The Sound Pressure Level (SPL) of this signal is
5. The preferred standard frequency range selected for most speech analyses is between _______ and ________ Hz

Answer 1