Measuring sound velocity based on acoustic resonance using multiple narrow band transducers
Na Li,
Zihao Chen,
Jiejun Zhu,
Mi Hyun Choi,
Jin Yang,
Zhen Yuan,
Lei Sun,
Chunlong Fei,
Zhihai Qiu
Affiliations
Na Li
School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China
Zihao Chen
School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China
Jiejun Zhu
Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China
Mi Hyun Choi
Department of Bioengineering, Stanford University, CA, USA
Jin Yang
Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Key Laboratory of Opto-Electronics Information Technology, Ministry of Education, School of Precision In-strument & Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
Zhen Yuan
Faculty of Health Sciences, Centre for Cognitive and Brain Sciences, University of Macau, Macau SAR China
Lei Sun
Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, PR China
Chunlong Fei
School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Corresponding author. School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China
Zhihai Qiu
School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China; Corresponding author. School of Microelectronics, Xidian University, Xi'an; Guangdong Institute of Intelligence Science and Technology, Hengqin, Zhuhai, Guangdong 519031, China
The sound velocity in a medium is closely related to its material properties, including its composition, structure, density, pressure, and temperature. Various methods have been developed to determine the sound velocity through materials. Among them, a strategy based on ultrasound resonance frequency has been most widely used due to the simplicity. However, it requires a transducer with a wide bandwidth to cover enough resonance frequencies to perform the consequent calculations. In this paper, we develop a resonance method for measuring sound velocity, using multi-frequency narrow-band transducers breaking through the limitation of transducer bandwidth on the utilization of the resonance method. We use different transducers at different center frequencies and with different bandwidth to measure the sound velocity in 100-μm and 400-μm thick steel pieces. The measurement results of different combinations are in good agreement, verifying that the use of multi-frequency narrow-band transducer combinations. Given that most therapeutic transducers have a narrow bandwidth, this method can be used during intracranial ultrasound stimulation to optimize targeting by non-invasively measuring the sound velocity in the skull, especially at thinner locations.
