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Acoustic metamaterial. An acoustic metamaterial, sonic crystal, or phononic crystal is a material designed to control, direct, and manipulate sound waves or phonons in gases, liquids, and solids (crystal lattices). Sound wave control is accomplished through manipulating parameters such as the bulk modulus β, density ρ, and chirality.
Institute of Acoustics, Chinese Academy of Sciences. The Institute of Acoustics (IOA, Chinese: 中国科学院声学研究所) of the Chinese Academy of Sciences (CAS) was established in 1964 [1] by the Chinese government in the context of China's national defense needs for acoustic research, under the auspices of Marshall Nie Rongzhen. [2]
A thin-film bulk acoustic resonator (FBAR or TFBAR) is a device consisting of a piezoelectric material manufactured by thin film methods between two conductive – typically metallic – electrodes and acoustically isolated from the surrounding medium. The operation is based on the piezoelectricity of the piezolayer between the electrodes.
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer.
The following outline is provided as an overview of and topical guide to acoustics: Acoustics – interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while ...
Brüel & Kjær. Brüel & Kjær (Sound and Vibration Measurement A/S) is a Danish multinational engineering and electronics company headquartered in Nærum, near Copenhagen. It was the largest producer in the world of equipment for acoustic and vibrational measurements. [2][3] Brüel & Kjær is a subsidiary of Spectris.