The US embassy in Havana more than halved its staff in 2017 when diplomats complained of headaches, nausea and other ailments after hearing penetrating noises in their homes and nearby hotels. The mysterious wave of illness fuelled speculation that the staff had been targeted by an acoustic weapon. But a fresh analysis of the audio recording has revealed what scientists in the UK and the US now believe is the true source of the piercing din: it is the song of the Indies short-tailed cricket, known formally as Anurogryllus celerinictus.
— source theguardian.com | 6 Jan 2019