Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | e202200161 |
| Fachzeitschrift | Journal of biophotonics |
| Jahrgang | 15 |
| Ausgabenummer | 11 |
| Frühes Online-Datum | 6 Aug. 2022 |
| Publikationsstatus | Veröffentlicht - 3 Nov. 2022 |
Abstract
The aim of this work is to generate defined tones that cover the human hearing range in aqueous media for a later application in middle or inner ear implants. In our experiments, we investigated the characteristics of single laser pulses and pulse trains with different laser repetition rates of nanosecond laser pulses that were focused into aqueous media in a small volume. The frequency of the generated tones was limited by the spectral properties of the single acoustic pulses, which depended on the medium. Tones with fundamental frequencies above 8 kHz were generated using laser pulses focused into water. By replacing water with gel, tones between 500 Hz and 20 kHz could be produced. The generation of tones in the low-frequency range was only possible when laser pulse trains with pulse density modulated pulse patterns were applied in gel. This enabled the generation of tones between 20 Hz and 2 kHz. Consequently, the combination of different pulse patterns for the different frequency ranges allows generating optoacoustic tones between 20 Hz and 20 kHz in gel. Thus, we can cover the complete range of human hearing through optoacoustically generated tones.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Allgemeine Chemie
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Biochemie, Genetik und Molekularbiologie (insg.)
- Allgemeine Biochemie, Genetik und Molekularbiologie
- Ingenieurwesen (insg.)
- Allgemeiner Maschinenbau
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Journal of biophotonics, Jahrgang 15, Nr. 11, e202200161, 03.11.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Optoacoustic tones generated by nanosecond laser pulses can cover the entire human hearing range
AU - Lengert, Liza
AU - Lohmann, Hinnerk
AU - Johannsmeier, Sonja
AU - Ripken, Tammo
AU - Maier, Hannes
AU - Heisterkamp, Alexander
AU - Kalies, Stefan
N1 - Funding Information: Alexander Heisterkamp and Stefan Kalies contributed equally to this work. We thank the group of Prof Birgit Glasmacher, especially Dr Oleksandr Gryshkov, for giving us the opportunity and helping with the measurements of the viscosity at their rheometer. This work was supported by the German Research Foundation, Germany Clusters of Excellence Hearing4all (EXC 2177). Open access funding enabled and organized by Projekt DEAL.
PY - 2022/11/3
Y1 - 2022/11/3
N2 - The aim of this work is to generate defined tones that cover the human hearing range in aqueous media for a later application in middle or inner ear implants. In our experiments, we investigated the characteristics of single laser pulses and pulse trains with different laser repetition rates of nanosecond laser pulses that were focused into aqueous media in a small volume. The frequency of the generated tones was limited by the spectral properties of the single acoustic pulses, which depended on the medium. Tones with fundamental frequencies above 8 kHz were generated using laser pulses focused into water. By replacing water with gel, tones between 500 Hz and 20 kHz could be produced. The generation of tones in the low-frequency range was only possible when laser pulse trains with pulse density modulated pulse patterns were applied in gel. This enabled the generation of tones between 20 Hz and 2 kHz. Consequently, the combination of different pulse patterns for the different frequency ranges allows generating optoacoustic tones between 20 Hz and 20 kHz in gel. Thus, we can cover the complete range of human hearing through optoacoustically generated tones.
AB - The aim of this work is to generate defined tones that cover the human hearing range in aqueous media for a later application in middle or inner ear implants. In our experiments, we investigated the characteristics of single laser pulses and pulse trains with different laser repetition rates of nanosecond laser pulses that were focused into aqueous media in a small volume. The frequency of the generated tones was limited by the spectral properties of the single acoustic pulses, which depended on the medium. Tones with fundamental frequencies above 8 kHz were generated using laser pulses focused into water. By replacing water with gel, tones between 500 Hz and 20 kHz could be produced. The generation of tones in the low-frequency range was only possible when laser pulse trains with pulse density modulated pulse patterns were applied in gel. This enabled the generation of tones between 20 Hz and 2 kHz. Consequently, the combination of different pulse patterns for the different frequency ranges allows generating optoacoustic tones between 20 Hz and 20 kHz in gel. Thus, we can cover the complete range of human hearing through optoacoustically generated tones.
KW - nanosecond pulsed laser
KW - optical breakdown
KW - optoacoustics
KW - photoacoustic
KW - pulse density modulation
KW - sound generation
KW - tone generation
UR - http://www.scopus.com/inward/record.url?scp=85135939703&partnerID=8YFLogxK
U2 - 10.1002/jbio.202200161
DO - 10.1002/jbio.202200161
M3 - Article
AN - SCOPUS:85135939703
VL - 15
JO - Journal of biophotonics
JF - Journal of biophotonics
SN - 1864-063X
IS - 11
M1 - e202200161
ER -