pneumotachograph การใช้

The plethysmograph has two chambers, each fitted with a pneumotachograph.
A pneumotachograph having these properties was first described by Rothenberg and termed by him a circumferentially vented mask or CV mask.
The measurements taken by the spirometry device are used to generate a pneumotachograph that can help to assess lung conditions such as : asthma, pulmonary fibrosis, cystic fibrosis, and chronic obstructive pulmonary disease.
There are small differences in the manner in which nasalance is computed in various devices, and differences in the manner in which the oral and nasal acoustic energies are separated physically, as by a hard separator plate held against the upper lip vs . a two-chamber pneumotachograph mask.
A technique for obtaining an estimate of the glottal volume velocity waveform during voiced speech is the "' inverse-filtering "'of either the radiated acoustic waveform, as measured by a microphone having a good low frequency response, or the volume velocity at the mouth, as measured by a pneumotachograph at the mouth having a linear response, little speech distortion, and a response time of under approximately 1 / 2 ms.