Natural sonic crystal absorber constituted of seagrass (Posidonia Oceanica) fibrous spheres

Barguet, Laurianne; Romero‐García, Vicente; Jiménez, Noé; Garcı́a-Raffi, L. M.; Sánchez‐Morcillo, Víctor J.; Groby, Jean‐Philippe

doi:10.1038/s41598-020-79982-9

Cited by 13 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, aegagropiles from Posidonia oceanica, the spherical aggregates formed by fibers from this phanerogam, show a high sound absorption capacity [55]. This characteristic might be present in living vegetation, which would also explain the current results.…”

Section: Acoustic Detection and Characterization Of P Oceanica Meadowssupporting

confidence: 68%

Vertical Configuration of a Side Scan Sonar for the Monitoring of Posidonia oceanica Meadows

Llorens-Escrich

Tamarit

Hernandis

et al. 2021

JMSE

View full text Add to dashboard Cite

Posidonia oceanica meadows are ecosystem engineers that play several roles in marine environment maintenance. In this sense, monitoring of the spatial distribution and health status of their meadows is key to make decisions about protecting them against their degradation. With the aim of checking the ability of a simple low-cost acoustic method to acquire information about the state of P. oceanica meadows as ecosystem indicators, ground-truthing and acoustic data were acquired over several of these meadows on the Levantine coast of Spain. A 200 kHz side scan sonar in a vertical configuration was used to automatically estimate shoot density, canopy height and cover of the meadows. The wide athwartship angle of the transducer together with its low cost and user friendliness entail the main advantages of this system and configuration: both improved beam path and detection invariance against boat rolling. The results show that canopy height can be measured acoustically. Furthermore, the accumulated intensity of the echoes from P. oceanica in the first 30 centimeters above the bottom is indirectly related to shoot density and cover, showing a relation that should be studied deeply.

show abstract

Section: Acoustic Detection and Characterization Of P Oceanica Meadowssupporting

confidence: 68%

Vertical Configuration of a Side Scan Sonar for the Monitoring of Posidonia oceanica Meadows

Llorens-Escrich

Tamarit

Hernandis

et al. 2021

JMSE

View full text Add to dashboard Cite

show abstract

“…Perfect absorption in a duct propagation problem can be obtained when the propagation symmetry is broken [3], when degenerated resonators are used [9], or when symmetry inversion frequency is tuned [19]. The simplest system is thus an asymmetric absorber [3] that is composed of at least two different resonators placed at a finite distance from each other along the duct axial direction.…”

Section: Asymmetric Absorber Lining a Duct Of Constant Cross Sectionmentioning

confidence: 99%

Perfect, broadband, and sub-wavelength absorption with asymmetric absorbers: Realization for duct acoustics with 3D printed porous resonators

Boulvert

Humbert

Romero‐García

et al. 2022

Journal of Sound and Vibration

View full text Add to dashboard Cite

“…They have also been shown to be a suitable source of lignocellulosic fibres to produce pulp and paper [26]. In addition, a crystal absorber constituted of Posidonia oceanica fibrous spheres can be made to develop acoustic materials [27]. Recently, a study on the benefits of Posidonia oceanica leaf extracts to treat diseases revealed anti-inflammatory properties [28] and the inhibition of human cancer cell migration [29].…”

Section: Introductionmentioning

confidence: 99%

Revalorization of Posidonia oceanica Waste for the Thermochemical Production of Biochar

et al. 2022

View full text Add to dashboard Cite

Every year, many tonnes of Posidonia oceanica are removed from Mediterranean beaches to maintain the quality and pleasure of use of the beaches. Most of this waste ends up in landfills, entailing removal costs. In this work, the Posidonia oceanica material was characterised, and a washing system was developed to obtain biochar. An adequate washing of the starting biomass was shown to play a key role as it led to an over 90% salt content reduction and, therefore, a decrease in conductivity values. The use of biochar as a soil remediator improves soil properties, carbon sequestration, and plant growth. However, not all types of biochars are suitable for this type of application. Therefore, the properties of biochar made from Posidonia oceanica at different temperatures (300, 400, and 500 °C) were studied. All the biochars obtained showed to exceed 10% organic carbon, which is the lower limit to be applied to soils, the maximum percentage having been obtained at 300 °C. In addition, all presented pH values (8.02, 10.32, and 10.38 for the temperatures of 300, 400, and 500 °C, respectively) that were similar to those of other effective biochars for the remediation of acid soils.

show abstract

Natural sonic crystal absorber constituted of seagrass (Posidonia Oceanica) fibrous spheres

Cited by 13 publications

References 34 publications

Vertical Configuration of a Side Scan Sonar for the Monitoring of Posidonia oceanica Meadows

Vertical Configuration of a Side Scan Sonar for the Monitoring of Posidonia oceanica Meadows

Perfect, broadband, and sub-wavelength absorption with asymmetric absorbers: Realization for duct acoustics with 3D printed porous resonators

Revalorization of Posidonia oceanica Waste for the Thermochemical Production of Biochar

Contact Info

Product

Resources

About