I have 25 years of experience and specialize in the field of acoustics with specific knowledge in the areas of acoustical engineering, forensic multimedia and psychoacoustics. I have published on such topics as acoustics, psychoacoustics and voice identification. I have testified 35 times on topics such as patent infringement, audibility and authentication and voice analysis. I have also worked as a research scientist specializing in human factors, communications engineering, and psychoacoustics, with multiple patents and publications in the field.