Acoustic impedance meter type ZA20
Acoustic Impedance Meter, type ZA20, used by Dr Michele Clements in her studies of hearing in the unborn child, c1970-1980.
Dr Michele Clements used this acoustic impedance meter to study the hearing of the unborn child. It is one of a several of items of equipment acquired by the Science Museum which were developed and used by Dr Clements at various London maternity hospitals. They represent a novel and personal approach to foetal monitoring.