Objective To investigate the effects of soundintensityandfrequency on phonatory stability.
目的研究声强和频率对发声稳定性的影响。
2
This paper explores the feasibility of ultrasonic technology leading to produce fire-retardant wood and test conditions such as frequency, soundintensityand time etc.
To prove the system can be used in underwater acoustooptic communications, with this system, the acoustic frequencyandintensity of underwater sound source are detected.