The contribution of source–filter theory to mammal vocal communication research

摘要: The field of animal vocal communication has benefited greatly from improved understanding production mechanisms and specifically the generalization sourcefilter theory speech to non-human mammals. application enabled researchers decompose acoustic structure signals according their mode thereby predict variation that is caused by anatomical or physiological attributes caller. states result a two-stage production, with glottal wave generated in larynx (the source), being subsequently filtered supralaryngeal tract filter). This predicts independent indexical information such as body size, weight, age sex can be contained both (mostly characterized its fundamental frequency), spectral envelope radiated vocalization resonances formant frequencies). Additionally, fluctuations emotional motivational state have been found influence characteristics reliable predictable manner perceptually available receivers. While vocalizations contain some dynamic attributes, static are sufficient provide an effective means individual discrimination within across call types. In this paper, we draw together wealth experimental work conducted framework over last decade review how experiments elucidated communicative value vocalizations.