It is the declamation, when the model is alive or sensate; it is the tone, when the model is insensate.
Its long, funnel-shaped form dipped and lifted, trailing back and forth like some sensate thing.
sensate sen·sate (sěn'sāt') or sen·sat·ed (-sā'tĭd)
Perceived by a sense or the senses.
Having physical sensation.