Place the rubber mallet and tuning fork on the lectern with the open end of the resonance box facing the audience. Details of the tuning fork can't be seen in a large lecture hall, but the sound can ...
Fig. 1 The simulation of stress distribution in QEPAS: (a) standard QTF, (b) four-prong QTF. In 2002, Tittel et al. proposed a gas sensing technology named quartz-enhanced photoacoustic spectroscopy ...
THE tuning-fork when its number of double vibrations, to and from in a second, or briefly its frequency, has been ascertained, is a most convenient instrument for measuring minute divisions of time.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results