How do crickets get away with being so loud without getting eaten?
They don't always 'get away with it'!  A study by Pascoal et al. (2014) found that field crickets (Teleogryllus oceanicus) on Oahu and Kauai islands of Hawaii have lost the ability to produce sound after an invasive wasp that is acoustically oriented to prey was introduced to the islands within this century. There are a few mutation to the crickets' wing morphology that produces &quot;flat wings&quot; that cannot make sound. Ordinarily, this mutation would reduce fitness through a reduction in competition for attracting mates. However, the selection pressure from the wasp caused independent mutations for flat winds to sweep through the island to the point that the Kauai population was 96% flat wing.
This example illustrates that the deciding factor between 'getting away' with producing so much noise comes down to the selection balance of attracting more mates or attracting more predators.
Reference:
Pascoal, S., Cezard, T., Eik-Nes, A., Gharbi, K., Majewska, J., Payne, E., … Bailey, N. W. (2014). Rapid convergent evolution in wild crickets. Current Biology: CB, 24(12), 1369–1374.