| 摘要 |
A device (20) is disclosed that, in an illustrative embodiment, includes an input line (201), a main gain component (229), a first local gain component (221), and a second local gain component (222). The main gain component (229), the first local gain component (221), and the second local gain component (222) each have a communicative connection with the input line (201). The main gain component (229) is configured for applying a main gain to an ultrasonic wave signal received via the input line (201), thereby providing a main gain signal (151,157). The first local gain component (221) is configured for applying a first local gain to a portion of the ultrasonic wave signal within a first signal gate (113), and thereby providing a first local gain signal (153). The second local gain component (222) is configured for applying a second local gain to a portion of the ultrasonic wave signal within a second signal gate (115), and thereby providing a second local gain signal (155). |
