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Jinshun Hu, Yongshui Lin, Zhiwei Zhou, Xiaofei Cao, Qingjia Chi and Weiguo Wu
To further improve the low-frequency broadband sound absorption capability of the underwater anechoic layer (UAL) on the surface of marine equipment, a novel sound absorption structure with cavities (NSSC) is designed by adding resonators and honeycombs ...
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Kangkang Shi, Dongsheng Li, Dongsen Hu, Qi Shen and Guoyong Jin
The acoustic absorption characteristics of anechoic coatings attached to the surface of underwater vehicles are closely related to their acoustic stealth. Owing to the essential property of local resonance, the narrow sound-absorption band cannot meet th...
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Xin Li, Bilong Liu and Chong Qin
A perforated plate with stepwise apertures (PPSA) is proposed to improve sound absorption for low frequencies. In contrast with an ordinary perforated plate with insufficient acoustic resistance and small acoustic mass, the perforated plate with stepped ...
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Xinmin Shen, Panfeng Bai, Xiaocui Yang, Xiaonan Zhang and Sandy To
The optimal combination structure low frequency sound absorber can be used in acoustic environmental protection and industrial noise reduction.
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Yaw-Shyan Tsay, Jui-Yen Lin and Faxin Ma
The bass ratio describes the relationship between the reverberation energy in the low frequency region and that of the middle frequency. An appropriate bass ratio can create a warm sound; however, too much bass can influence speech clarity (C50) and work...
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Callum Daniels and Noel Perera
Due to the nature of their deployment, very few people know the location and course of a submarine during its time at sea, including only a handful of the ship?s crew. The possibility of immediate retaliation by the UK and her allies is aided by the subm...
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