Insects cannot exhibit the Lombard effect because stridulation is unmodulable

Evidence

Also, frogs are able to change their amplitude when the background noise increases. In insects this phenomenon seems not be present. In fact, the stridulating mechanisms of an insect cannot be modulated. — Almo Farina, Soundscape Ecology, 1299

Categorization

• XREF: Explains a mechanistic boundary: which taxa can and cannot amplitude-adjust, linking to the acoustic niche hypothesis. — connects to: Lombard effect describes raising vocal intensity when background noise is loud — Almo Farina, Soundscape Ecology: Principles,…, 1296