Yakushiji Ryouko no Kaiki Jikenbo

Synopsis

The unusual circumstances surrounding the death of a former classmate, the most recent victim in a series of suicides which have already claimed the life of a well-known police forensics scientist, along with an unusual tip prompt Superintendent Yakushiji and her subordinate, Assistant Inspector Izumida, to launch an investigation by searching for clues in an acoustic lab. They come across a bitter university professor and a new species of ultrasound crickets.

(Source: Wikipedia)