Results 41 to 50 of about 47,971 (264)

Sound Absorption Capability and Anatomical Features of Highly Sound Absorptive Wood

Journal of the Korean Wood Science and Technology, 2010
일본산 산공재 중 구조적 특징이 목재흡음에 적합하다고 사료되는 카기카즈라목재의 흡음성능과 구조적 특징을 관찰하고자 목재횡단방향으로 원반형시험편을 채취하여 구조적 특징을 관찰하고, 전달함수법으로 흡음율을 측정하였다. 측정주파수범위에서 카기카즈라 횡단면의 흡음율은 0.30에서 0.50의 수치를 나타내었다. 비교수종인 낙엽송시험편보다 2∼3배 높은 흡음율을 나타내었으며, 특히 2∼4 KHz의 주파수영역에서는 50% 전후로 높은 흡음율을 나타내었다. 카기카즈라목재의 횡단면에서는 다수의 커다란 도관이 존재하고 이들 도관요소들은 단일천공판으로 연결되어 다공질형흡음에 유용한 연속된 모세관이 다량 존재하는 사실을 확인할 수 있었다.
Chun-Won Kang, Wook Kang, Gwang-Chul Kim
openaire   +2 more sources

Hybrid Amyloid–Boron Nitride Aerogels for Lightweight Sound Insulation

Advanced Materials, EarlyView.
Amyloid fibrils template the mild formation of boron nitride–rich hybrid aerogels with hierarchical porosity, enhanced BN‐like ordering, and fibril‐reinforced mechanics. These ultralight materials combine thermal stability with strong sound absorption and transmission loss, offering a sustainable bio‐assisted route toward lightweight acoustic shields ...
Mohammad Peydayesh, Andrin Lustgarten, Stefan Schoenwald, Enrico Boschi, My Hanh Bui, Ali Miserez, Felix Donat, Christoph R. Müller, Raffaele Mezzenga   +8 more
wiley   +1 more source

Sound Absorption by Tree Bark

, 2019
Proceedings of the ICA 2019 and EAA Euroregio : 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019 : 9-13 September 2019, Aachen, Germany / proceedings editor: Martin Ochmann, Michael Vorländer, Janina Fels 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019, ICA 2019, Aachen, Germany, 9 Sep 2019 - 13 ...
Li, Mengmeng, van Renterghem, Timothy, Kang, Jian, Botteldooren, Dick   +3 more
openaire   +3 more sources

Topology‐Orchestrated Multi‐physical Energy Control in Turtle Shell‐Inspired Metamaterials

Advanced Materials, EarlyView.
A turtle shell‐inspired lattice metamaterial efficiently manages acoustic, fluid‐thermal, and mechanical energy flows simultaneously. The unique hybrid‐coupling architecture achieves superior sound attenuation via pore‐cavity resonance, facilitates effective airflow transport, and maximizes mechanical energy absorption through multistage cell ...
Xi Wang, Shiyi Wang, Bingzhi Chen, Xinwei Li   +3 more
wiley   +1 more source

Penentuan Nilai Penyerapan Suara Pada Panel Dinding Beton Busa Sebagai Panel Alternatif Yang Ramah Lingkungan

Jurnal Rekayasa Kimia & Lingkungan, 2011
Panel of foam concrete wall is a type of membrane panel which has maximum sound absorption and can create quite and environmentally friendly room. The purpose of this study was to determine the magnitudeof the sound absorption value using the Sabine ...
Zulfian Zulfian, Abdullah Abdullah, Fahridhal Fahridhal   +2 more
doaj   +2 more sources

Bioinspired Adaptive Surfaces for Intelligent Liquid Manipulation: Progressing From Passive and Active to Hybrid Strategies

Advanced Materials, EarlyView.
This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao, Yiyuan Zhang, Liqiu Wang, Alan C. H. Tsang   +3 more
wiley   +1 more source

Nonwoven‐Based Textile Architectures for Energy Storage Applications: Materials, Preparation, Characterization, and Prospects

Advanced Materials Interfaces, EarlyView.
Nonwoven textile architectures are emerging as versatile platforms for next‐generation energy storage, demonstrating how tailored materials and fabrication strategies enhance ion transport, conductivity, flexibility, and scalability for high‐performance sustainable devices.
Tarikul Islam, Md. Hanif Munshi, Rijon Saha, Shaikh Almoon Hussain, Aqib Adnan Shafin, Shumsul Arefin, Md. Kamruzzaman   +6 more
wiley   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Predicting Lightweight Powders with Useful Sound Absorption Characteristics from Their Specifications

Applied Sciences
Powders that absorb sound by longitudinal vibration have either a gentle or sharp sound absorption curve at the first absorption peak frequency. Experiments were performed to investigate the conditions under which longitudinal vibration occurs in powders
Shuichi Sakamoto, Keisuke Jindai, Koki Ikeda, Yuya Kawakami, Hiroaki Soeta   +4 more
doaj   +1 more source

Underwater sound absorption performance of acoustic metamaterials with multilayered locally resonant scatterers

Results in Physics, 2019
Although the conventional locally resonant acoustic metamaterials (LRAMs) have shown better sound absorption performance in the low frequency band, the effective frequency range of the sound absorption performance is quite narrow relatively.
Kangkang Shi, Guoyong Jin, Ruijie Liu, Tiangui Ye, Yaqiang Xue   +4 more
doaj   +1 more source