Apparatus (1) comprising: an electrical component (18), a transducer (5) arranged adjacent to the electrical component (18), the transducer (5) being a microphone, a rear volume (12) next to the transducer (5), the rear volume (12) being a rear volume of the microphone, an encapsulation material (10) which contains the electrical component (18), the transducer (5) and a part encapsulates the rear volume (12), and a lid (16) which is arranged on the encapsulation material (10), whereby the rear volume (12) is sealed, the encapsulation material having etched holes (15) which penetrate through the lid (16) are sealed.
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