Low-frequency calibration of a multidimensional acoustic intensity probe for application to rocket noise

2011 ◽  
Vol 130 (4) ◽  
pp. 2512-2512
Author(s):  
Jarom H. Giraud ◽  
Kent L. Gee ◽  
Scott D. Sommerfeldt ◽  
R. Troy Taylor ◽  
Jonathan D. Blotter
Keyword(s):  
Low Frequency ◽  
Acoustic Intensity ◽  
Frequency Calibration

Low-frequency calibration of a multidimensional acoustic intensity probe for application to rocket noise

2013 ◽  
Author(s):  
Jarom H. Giraud ◽  
Kent L. Gee ◽  
Scott D. Sommerfeldt ◽  
Troy Taylor ◽  
Jonathan D. Blotter
Keyword(s):  
Low Frequency ◽  
Acoustic Intensity ◽  
Frequency Calibration

scholarly journals Effects of Stimulus Intensity and Frequency on the Force and Timing of Sensorimotor Synchronisation

2021 ◽  
pp. 1-23
Author(s):  
Neil P. M. Todd ◽  
Peter E. Keller ◽  
Sendhil Govender ◽  
James G. Colebatch
Keyword(s):  
Low Frequency ◽  
Independent Effect ◽  
Acoustic Intensity ◽  
Vestibular Evoked Myogenic Potential ◽  
Surface Electrodes ◽  
Sensorimotor Synchronisation ◽  
Timing Strategies ◽  
Electroencephalographic Activity ◽  
Timing Processes ◽  
Flexion And Extension

Abstract We report an experiment to investigate possible vestibular effects on finger tapping to an auditory anapaest rhythm. In a sample of 10 subjects, index finger acceleration and tapping force were recorded along with extensor/flexor activity and the associated electroencephalographic activity measured at central and cerebellar surface electrodes. In a prior session with a standard short air-conducted 500-Hz pip, vestibular evoked myogenic potential thresholds were measured and subsequently used to set the acoustic intensity. During the main experiment subjects were asked to synchronise tapping to the pips arranged in the anapaest at two different frequencies, 500 Hz vs 5 kHz, so that only the low-frequency high-intensity condition was a vestibular, as well as an auditory stimulus. We hypothesised that a vestibular effect would manifest in an interaction between the frequency and intensity factors for a range of dependent measures of tapping performance. No clear evidence was found for vestibular effects, but this was likely due to the confounding effects of an independent effect of intensity and the relative weakness of the acoustic vestibular stimulus. However, the data did show novel evidence for two distinct timing processes for the flexion and extension stages of a tap cycle and two distinct timing strategies, which we refer to as ‘staccato’ and ‘legato’, characterised by different profiles of force and extension.

Low Frequency Calibration of Measurement Microphones

Noise Notes ◽  
2010 ◽  
Vol 9 (2) ◽  
pp. 55-60
Author(s):  
Gunnar Rasmussen ◽  
Kim Nielson
Keyword(s):  
Low Frequency ◽  
Frequency Calibration

High-precision and low-cost vibration generator for low-frequency calibration system

2018 ◽  
Vol 29 (3) ◽  
pp. 034008 ◽  
Author(s):  
Rui-Jun Li ◽  
Ying-Jun Lei ◽  
Lian-Sheng Zhang ◽  
Zhen-Xin Chang ◽  
Kuang-Chao Fan ◽  
...  
Keyword(s):  
High Precision ◽  
Low Cost ◽  
Low Frequency ◽  
Calibration System ◽  
Frequency Calibration

Low Frequency Calibration of Measurement Microphones

2009 ◽  
Vol 28 (3) ◽  
pp. 223-228 ◽  
Author(s):  
Gunnar Rasmussen ◽  
Kim M. Nielson
Keyword(s):  
Frequency Response ◽  
Sound Pressure ◽  
Low Frequency ◽  
Constant Force ◽  
Low Frequencies ◽  
Proportional Relation ◽  
Frequency Calibration ◽  
Large Piston

The calibration of measurement microphones below 100 Hz is not very well covered by the present IEC standards. The uncertainty increases rapidly and for very low frequencies it goes toward infinity. This paper approaches this issue and presents a unique way to verifying and calibrating the low-frequency response of measurement microphones. Using a small isolated calibration volume and applying a constant force to a large piston inside this volume, you obtain a direct proportional relation between force and sound pressure, allowing calibration of measurement microphones down to 0.01 Hz.

scholarly journals TEST STAND FOR LOW-FREQUENCY CALIBRATION OF ACCELEROMETERS

2019 ◽  
pp. 18-26
Author(s):  
M. Yu. Zakharchenko ◽  
◽  
A. O. Kuznetsov ◽  
A. S. Yakovishin ◽  
V. P. Batischev ◽  
...  
Keyword(s):  
Low Frequency ◽  
Test Stand ◽  
Frequency Calibration
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