Acoustic Experiment Research On The Skull Vibration From Vocalization

Vibration is a quite commonphenomenon in daily life. In a broad sence, thesound, the light and the electromagnetic wave are all some kind of vibration.Our life will not function well without vibration. In the meantime, theearthquake, the sea wave, the vibration of bigmachine can bring usinconvenience and even dangerous. In terms of acoustics, vibration needs to becontrolled or eliminated in most of time. The measurement of vibration isnecessary whether making use of the vibration or controlling it. In this thesis,the measurement of vibration will be specified including the choosing,calibrating, installing of the vibration senser.Every coin has two sides. Vibration can be positive to human body as it isthe survival of the fittest.The American doctors JindrakK.F.andJindrak H. putforward an theory concerning the massaging effect vocalization has on braincells andthe promoting effect of metabolism of both the brain tissue and thecerebrospinal fluid.In addition, vibration from vocalization can also affect thearachnoid granulations and speed up the cerebrospinal fluid flow from thesubarachnoid space to the superior sagittal sinus and the lateral lacunae, andthen back to the blood. In this way, the refreshment of cerebrospinal fluid andthe cleaning of the brain can be both promoted. After Doc. Jindrak published histhesis, he did not neither trying to measure the vibration from vocalization, noranalyzing the effect of it more deeply. This thesis will continue the research ofvibration from vocalization on the base the JindrakTheoty in the view ofacoustics. The first step is to find out the measurement method of vibration fromvocalization. The difficulty is the arrangement and installation of the vibrationsensor. Step tow is to establish an evaluation methodology of the vibration fromvocalization by using the acoustic test equipments and means, and the key pointis to pick up an appropriate quantity to evaluate the vibration of each tone.Finally, step three is going back to the medical field, and verifying or overturning the JindrakThoery that vibroacoustic stimulation can speed up thecirculation of cerebrospinal fluid. To achieve that, we need volunteers toparticipate the vibroacoustic spell research for half a year. The volunteers havethe MRI test twice over6months and have the CSF flow rate test before andafter having the viboacoustic stimulation.Since this part of the thesis sets footinto the medical field, the study is not very thorough, but it can be reference forthe future research in some way.Vibration is a quite commonphenomenon in daily life. In a broad sence, thesound, the light and the electromagnetic wave are all some kind of vibration.Our life will not function well without vibration. In the meantime, theearthquake, the sea wave, the vibration of bigmachine can bring usinconvenience and even dangerous. In terms of acoustics, vibration needs to becontrolled or eliminated in most of time. The measurement of vibration isnecessary whether making use of the vibration or controlling it. In this thesis,the measurement of vibration will be specified including the choosing,calibrating, installing of the vibration senser.This thesis has6chapters. Chapter1is Introduction, Chapter2isMechanism of vibrations from vocalization, Chapter3is Vibration andmeasurement, Chapter4is Acoustic experiment research on the skull vibrationfrom vocalization, Chapter5is Medicalexperiment research on the skullvibration from vocalization–research of the speeding up of CSF byvibroacoustic stimulation, Chapter6is Conclusion.