  Results of the measurements of sound speed and attenuation in a bubbly medium
are reported. Monodisperse bubble solutions are sonicated with broadband
ultrasound pulses with pressure amplitudes ranging between 12.5-100 kPa.
Fundamental relationships between the frequency dependent attenuation, sound
speed and pressure are established. A new model for the estimation of sound
speed and attenuation is derived that incorporates the effect of nonlinear
bubble oscillations on the wave propagation in the bubbly media. Model
predictions are in good agreement with experimental results.
