Sound transducer

A signal processing unit for acoustic reproduction, the signal processing unit being configured to:

• process an acoustic interaction with a first sound field, based on a first electroacoustic sound transducer and a second electroacoustic sound transducer, provided for generating the first sound field;
• generate a modified sound field, wherein the modified sound field has a predetermined acoustic impedance value;
• measure a current impedance value in the first sound field with a control loop in order to implement subsequent readjustment of the modified sound field;
• and
• process further relevant acoustic parameters, in particular geometric parameters of a headphone or an earphone, in order to set the predetermined acoustic impedance value for the modified sound field.

A method for acoustic reproduction, the method comprising:

• generating a first sound field with a first electroacoustic sound transducer;
• generating a second signal for acoustic interaction with the first sound field;
• generating a modified sound field from the acoustic interaction between the second signal and the first sound field, wherein the modified sound field has a predetermined acoustic impedance value;
• receiving impedance information;
• and
• converting the impedance information into an acoustic signal so that the modified sound field has the predetermined acoustic impedance value.