Two parameters of the Transducer are Structure and Function.
For now, I just want to discuss in general two parameters of transducers: structure and function.
Obviously, the structure has got to be there for the transducer to work.
For speech, you have to have a larynx (voice box), velum (soft palate), tongue, jaw and lips to articulate (not to mention a vast array of muscles).
If we didn't have a tongue, speech would be difficult, to say the least.
Now if you run your tongue along the roof of the mouth you encounter another structure vital to speech--the hard palate.
These structures form as the result of processes. It's a curious saga, for example how, the palate forms.
Unlike the Pillsbury Doughboy, who appears to have a nose and mouth pop neatly into existence, in humans the process is more bizarre.