Device for detecting the vibration characteristics of buried object by using acoustic technques

Device for detecting the vibrational features of objects buried at a shallow depth comprising a transducer ( 3 ) for transforming electric signals in time variable forces, at least a rigid rod ( 1 ) able to penetrate the soil configured in such a way that it transmits by contact (or by interposition of small layers of soils) the time variable forces exerted by said transducer to the object whose vibrational features are intended to be detected and detects the vibrations of the same object, and at least a sensor ( 2 ) for detecting the vibrations transmitted by said object to the device through at least one of said rigid rods, characterized in that said transducer is an electromagnetic actuator.