Acoustic microscopy acoustic microscope (CSAM), and C-mode scanning acoustic microscope (C-SAM). More recently acoustic microscopes based around picosecond ultrasonics systems have demonstrated acoustic imaging in cells using sub-optical wavelengths working with ultrasonic frequencies into the multi-GHz. Since the vast majority of acoustic microscopes in use today are C-SAM type instruments, this discussion will be limited to these instruments. Ultrasound is broadly defined as any sound having a frequency above 20 kHz, which is approximately the highest frequency that can be detected by the human ear. However, the acoustic microscopes emit ultrasound ranging from 5 MHz to beyond 400 MHz so that micrometre
Ghosts (Monolake album) Ghosts (Monolake album) Ghosts is the seventh album from German techno music producer, Monolake (also known as Robert Henke). It is the second part of what is claimed to be a trilogy of three albums, that began with Monolake's sixth album, "Silence." Although the album follows a primarily techno aesthetic, it also incorporates elements of drum n' bass, dubstep, and ambient music. Some of the sounds of this album are notable in that they were created by sampling recordings that included frequencies outside of the range of human hearing (above 20 kHz), and then transposed down into the audible range.