| Title: |
Acoustical Sensitivity and Linearity of an Air-Coupled 3D-Printed Ferroelectret Ultrasonic Receiver |
| Authors: |
Suppelt, Sven; Altmann, Alexander A.; Schaumann, Stephan; Demuth, Nils; Müller, Marc; Jazdzewski, Luise E.; Gómez Álvarez-Arenas, Tomás E.; Bretthauer, Christian; Bittner, Achim; Kupnik, Mario |
| Publisher Information: |
IEEE |
| Publication Year: |
2025 |
| Collection: |
TU Darmstadt: tuprints |
| Description: |
3D-printed ferroelectret transducers, utilizing poly-lactic acid (PLA), present an eco-friendly alternative to ceramic-based transducers, which predominantly employ lead zirconate titanate (PZT). We demonstrate using 3D-printed ferroelectret ultrasonic transducers made from PLA featuring well-defined cavities as a sound receiver by developing a simple amplifier circuit and measure the resulting linearity and sensitivity. The quasi-permanently trapped surface charges inside the air cavities of the ferroelectret ultrasonic transducer serve as an electrical bias, resulting in a mechanical pre-stress due to the electrostatic force. The amplifier for the microphone does not need to provide a DC-Bias and is based on a charge amplifier with a flat amplification curve between 20 kHz and 80 kHz. We test the receiver in an anechoic chamber at a distance of 30 cm. We excite with a broadband electrostatic transducer over different frequencies and sound pressures. The receiver exhibits a linear relationship between output voltage and sound pressure, with a mean square error of 102.14 mV² at 50 kHz. The sensitivity varies with frequency, peaking at 29 kHz with -25 dB/VPa and has a 6 dB-bandwidth of 32 kHz. These results underscore the potential of easily manufacturable and adaptable ferroelectret transducers as viable, eco-friendly alternatives to traditional piezoelectric devices. |
| Document Type: |
conference object |
| File Description: |
text |
| Language: |
English |
| Relation: |
https://tuprints.ulb.tu-darmstadt.de/30007/1/2024-09-19__FINAL_IUS_2024__Ferro_SoundReceiver.pdf; Suppelt, Sven; Altmann, Alexander A.; Schaumann, Stephan; Demuth, Nils; Müller, Marc; Jazdzewski, Luise E.; Gómez Álvarez-Arenas, Tomás E.; Bretthauer, Christian; Bittner, Achim; Kupnik, Mario (2025)Acoustical Sensitivity and Linearity of an Air-Coupled 3D-Printed Ferroelectret Ultrasonic Receiver. 2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS). Taipei, Taiwan (22.9.2024-26.9.2024)doi:10.26083/tuprints-00030007 Conference or Workshop Item, Secondary publication, Postprint |
| DOI: |
10.26083/tuprints-00030007 |
| Availability: |
http://tuprints.ulb.tu-darmstadt.de/30007/; https://doi.org/10.26083/tuprints-00030007 |
| Rights: |
In Copyright ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.CC884D99 |
| Database: |
BASE |