ABSTRACT
High-frequency transducers, such as high-frequency-range loudspeakers and transducers for ultrasound, are usually designed for much smaller bandwidths than those common in audio. For audio applications, one usually needs a bandwidth of about three decades, that is, 20 Hz-20 kHz. Many high-frequency audio transducers are similar to ultrasound transducers and only cover the top two octaves of the audio range. Ultrasonic scale modeling for room acoustics, also needs a large bandwidth, although typically only two decades of bandwidths will be achieved. Some common uses are for airborne ultrasound in sonar applications for sensing and localization.
