Results 11 to 20 of about 4,938,454 (321)
Time-Frequency Analysis of Clinical Percussion Signals Using Matrix Pencil Method
Journal of Electrical and Computer Engineering, 2015 This paper discusses time-frequency analysis of clinical percussion signals produced by tapping over human chest or abdomen with a neurological hammer and recorded with an air microphone.
Moinuddin Bhuiyan +5 more
semanticscholar +2 more sources
Clinical Case Reports, 2022 A patient presenting with low back pain received 18 treatments of FDA‐approved low‐frequency vibro‐percussion wave stimulation known as Khan Kinetic Treatment (KKT).
Arwa Jameel Abu Omar +4 more
semanticscholar +2 more sources
Identification of Impact Frequency for Down-the-Hole Drills Using Motor Current Signature Analysis
Applied Sciences, 2023 In rotary-percussion drilling, the impact frequency is a crucial variable that is closely linked to operational factors that determine the efficacy of the drilling process, such as the rate of penetration, bit wear, and rock mass characteristics. Typical
Diego Brito +4 more
semanticscholar +3 more sources
Advances in Mechanical Engineering, 2019 Considering the insufficiency of numerical study on the percussion characteristic of hydraulic rock drill, which restricts the improvement of efficiency and reliability, a coupling model including the impact piston, spool valve, impact accumulator, and ...
Wei Ma +5 more
semanticscholar +2 more sources
Temperature and Frequency of Percussion Instruments
International Scholastic Journal of Science, 2016 The frequency produced by a wooden xylophone, a metallophone and a drum at temperatures ranging from -18C to 50C was studied. It was found that the frequency of the first two increases, while the drum’s frequency decreases with increasing temperature. Temperature had the greatest effect on the frequency of the xylophone.
César Díez Factor
openaire +2 more sources
Assessment of Diabetic Autonomic Nervous Dysfunction with a Novel Percussion Entropy Approach
Complexity, 2019 This study investigated the validity of a novel parameter, percussion entropy index (PEI), for assessing baroreflex sensitivity. PEI was acquired through comparing the similarity in tendency of change between the amplitudes of successive digital volume ...
Haicheng Wei +4 more
semanticscholar +2 more sources
Micromachines, 2022 In this study, a new method of ultrasonic high-frequency percussion (UH-FP) is proposed. Ultra-fine and ultra-long copper tube electrodes cannot be fabricated by traditional processing methods, and the copper tube electrodes fabricated by UH-FP can be ...
Xiajunyu Zhang +9 more
doaj +1 more source
Energy Reports, 2021 In the present study, a 3D FEM of compound percussive system considering a loading–unloading cycle was employed to simulate the dynamic single-cutter-rock interaction.
Yumei Li +4 more
doaj +1 more source
Intelligent recognition of voids behind tunnel linings using deep learning and percussion sound
Journal of Intelligent Construction, 2023 Voids behind tunnel linings are critical factors affecting tunnels’ safety and durability. For automatic, rapid, and accurate detection of void defects behind tunnel linings, this paper proposes an intelligent recognition method of void detection based ...
Xiaolei Zhang +6 more
doaj +1 more source
The impact of audio effects processing on the perception of hardness of Bass Drum
Cognitive Computation and Systems, 2022 In the music mixing, mixers and music producers often use hardness to describe the feeling of percussion instruments, such as the drum instruments.
Yu Wang +3 more
doaj +1 more source