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On the Virtualization of Audio Transducers.

Riccardo Giampiccolo1, Alberto Bernardini1, Oliviero Massi1

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Summary
This summary is machine-generated.

This study introduces a digital signal processing method for audio transducer virtualization, enabling digital alteration of acoustic behavior for both sensors and actuators. The approach uses inverse modeling to precisely mimic target transducer characteristics.

Keywords:
actuator virtualizationaudio transducerscircuital inversiondigital signal processingsensor virtualization

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Area of Science:

  • Acoustics and Signal Processing
  • Electrical Engineering
  • Audio Engineering

Background:

  • Virtualization digitally alters audio sensor/actuator acoustic behavior to mimic target transducers.
  • A prior method used inverse equivalent circuit modeling for loudspeaker virtualization.
  • This involved Leuciuc's inversion theorem and a nullor element for inverse model augmentation.

Purpose of the Study:

  • To broaden the concept of audio virtualization to include both sensors and actuators.
  • To provide generalized schemes and block diagrams for various input/output variable combinations.
  • To analyze and formalize the Direct-Inverse-Direct Chain for both sensor and actuator virtualization.

Main Methods:

  • Digital signal preprocessing based on inverse equivalent circuit modeling.
  • Application of Leuciuc's inversion theorem to derive inverse circuital models.
  • Augmentation of direct models with a theoretical nullor element.
  • Development of generalized Direct-Inverse-Direct Chain methodologies.

Main Results:

  • Demonstrated applicability of the virtualization method to both audio sensors and actuators.
  • Provided adaptable schemes and block diagrams for diverse virtualization scenarios.
  • Formalized variations of the Direct-Inverse-Direct Chain for sensors and actuators.
  • Successfully applied the method to virtualize a capacitive microphone and a nonlinear compression driver.

Conclusions:

  • The proposed digital signal processing framework effectively enables audio sensor and actuator virtualization.
  • The generalized approach offers a versatile tool for mimicking diverse acoustic transducer behaviors.
  • This work extends previous methods, providing a comprehensive solution for audio virtualization applications.