Open AccessImpact of THz Frequency on Underwater Acoustic Wave Propagation for Short Range Wireless Applications
Author(s) -
Rabiul Awal,
Mohd Yazid Yahya,
Nurafnida Afrizal,
Ahmad Zaki Annuar,
Wan Hafiza Wan Hassan
Publication year - 2021
Publication title -
cfd letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.288
H-Index - 13
ISSN - 2811-3969
DOI - 10.37934/cfdl.13.11.116125
Subject(s) - underwater , acoustics , seawater , wave propagation , terahertz radiation , underwater acoustic communication , transmitter , materials science , wavelength , optics , sound pressure , physics , geology , telecommunications , engineering , channel (broadcasting) , oceanography
Acoustic propagation in seawater is an important aspect of scientific investigation. However, the impact of the THz scale frequencies for acoustic propagation is not included in the studies. Thus, a finite element analysis of such propagation in a seawater medium is presented in this paper applying THz frequencies. A transmitter (circular with a diameter of 14 mm, a thickness of 3 mm) and a rectangular receiver (20×10×0.5 mm3) are designed to trace the variations in the propagation mediums. A propagation medium of seawater (70×40×60 mm3) with ice and softwood is modelled. A scale of frequencies (1 kHz to 1 THz) is applied to trace the impact on the propagation pattern. It is found that THz range frequencies provide a very small wavelength. As a result, the potential propagation distance is very small. As such, the sound pressure level, displacements of the receiver and pressure field shows very rapid drops in the magnitude. This work considers only 70 mm as propagation distance, yet the sharp decrement of performance parameters suggests that it is rather inconvenient to achieve useful efficiency using THz frequencies for acoustic propagation.