Results 91 to 100 of about 475,320 (249)

Laser spectroscopic studies of the pure rotational U_0(0) and W_0(0) transitions of solid parahydrogen [PDF]

open access: yes, 1991
High resolution spectrum of multipole-induced transitions of solid parahydrogen was recorded using diode and difference frequency laser spectroscopy.
Chan, Man-Chor   +3 more
core  

Acoustic and aerodynamic performance of a 1.83-meter (6-ft) diameter 1.25-pressure-ratio fan (QF-8) [PDF]

open access: yes
A 1.25-pressure-ratio 1.83-meter (6-ft) tip diameter experimental fan stage with characteristics suitable for engine application on STOL aircraft was tested for acoustic and aerodynamic performance.
Lucas, J. G., Woodward, R. P.
core   +1 more source

Pure-tone audiogram: measuring auditory sensitivity over the age [PDF]

open access: yes, 2013
In this study a pure tone audiogram was developed under the Matlab® mathematical software. Audiogram measurements were performed to 35 subjects belonging to the female and male and aged between 10 and 88 years old.
Fernandes, Paula O.   +1 more
core  

Multiple pure tone noise generated by fans at supersonic tip speeds [PDF]

open access: yes
The existence of clusters of pure tones at integral multiples of shaft speed has been noted for supersonic-tip-speed operation of fans and compressors.
Pickett, G. F., Sofrin, T. G.
core   +1 more source

Influence of headphone position in pure-tone audiometry

open access: yes, 2012
International audiencePure-tone audiometry (measurement of absolute thresholds using pure tones) is the main test for the diagnosis of hearing loss. It can be achieved by using either air conduction (with headphones or loudspeakers) or bone conduction ...
Jantzem, Brice   +2 more
core   +1 more source

Recent advances concerning an understanding of sound transmission through engine nozzles and jets [PDF]

open access: yes
Experiments on the interaction between a turbulent jet and pure tone sound coming from inside the jet nozzle are reported. This is a model representing the sound transmission from sound sources in jet engines through the nozzle and the jet flow into the ...
Bechert, D., Dfizenmaier, E., Michel, U.
core   +1 more source

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