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
Radio in the Republic of Ireland commercially in Ireland, and the first attempt to license such since 2002; as well as what will amount to four stations easily receivable in most of Dublin city and county. It is expected these may be the last commercial analogue services to be licensed, as the FM band will be highly saturated in Dublin and the midlands of Ireland. Digital Radio Mondiale (DRM) on Ireland's many unused ITU-allocated medium wave frequencies is expected to be the next round of licensing, particularly as some of these allocations are 15 to 20 kHz wide, which is enough for FM-alike quality with the