BioSono Inc. was founded in the summer of 2007 in Silicon Valley, California. BioSono provides a cyberspace (www.biosono.com) where researchers, engineers, and students can find useful reference and educational materials, conduct acoustic simulation, post questions on design and development, and get answers. The online KLM based transducer acoustic stack simulation, which is currently free, can help you choose piezoelectric, matching and backing material, and a tuning electrical network. The output from the model includes electrical transmit impedance, acoustic receive impedance, and both the impulse and pulse-echo response. The ultrasound beam profile simulation is a free web/email based service. This simulation can provide the calculated transmitted ultrasound pressure field under certain excitation for a given transducer aperture in a number of different geometrical configurations, including circular elements (flat and concave piston), rectangular elements, linear arrays, convex arrays, and 2D arrays. The simulation is based on Field II, which is a free program that utilizes the spatial impulse response method, and has been validated by many researchers for accuracy. The calculation is too time-consuming, and it may take up to one day for the server to send the user results by email. The ultrasound wave propagation simulation is also a free web/email based service. For a given 2D space, and a given target (round or square), an .avi or .gif movie file will be generated with an either a spherical, or plane incident wave passing through it. It may take up to one day for the server to send user results by email. In addition to the web based acoustic simulation, we also provide customized, more complicated simulations, transducer, and electrical designs.