A continuous low drone is vocalized which simultaneously emits an extremely high-pitched tone over the top of the drone.
A hand-tapping method is generally less painful than machine-dependent ones, and it also emits a less distracting noise.
A low humming or whirring noise typically emits from the machine as the mechanisms rotate.
A motion detector sweeps the area for up to 300 yards and emits a burst of sound undetectable to human ears.
A unique feature of this purifier is that it is a plug-in and has a built in nightlight that emits a blue glow.
A warm mist humidifier boils the water and emits a stream of steam into the air.
All brakes have a built-in warning indicator in the form of a "noise-maker" that emits this metal-on-metal scraping sound whenever the brakes are wearing down too far.
Among the long list of pollutants that the burning of fossil fuels emits into the air are sulfur oxides, nitrogen oxides, carbon monoxide, and carbon dioxide.
An underground stream emits waves of energy vertically to the surface and two ' sidebands ' at 45 degrees inclination.
At low speed, the fan emits a barely audible hum.
At the summit are two deep craters, the southern of which emits steam.
By sublimation in a current of hydrogen it can be crystallized in the form of regular octahedra; it is slightly harder than tin, but is softer than zinc, and like tin, emits a crackling sound when bent.
Candida also emits harmful byproducts, some of which are neurotoxins.
During the echo, an ultrasound transducer (hand-held wand placed on the skin of the chest) emits high-frequency sound waves to produce pictures of the heart's valves and chambers.
Essentially, when sugar--which is an asymmetrical crystal-is crushed, it emits sparks.
Excessively corroded metal, or metal treated with filler, emits a duller sound than does unaffected metal.
External monitoring of the fetus is accomplished by means of a transducer that emits continuous sound waves (ultrasound).
He was distinguished as the discoverer of radioactivity, having found in 1896 that uranium at ordinary temperatures emits an invisible radiation which in many respects resembles Röntgen rays, and can affect a photographic plate after passing through thin plates of metal.
He was distinguished as the discoverer of radioactivity, having found in 1896 that uranium at ordinary temperatures emits an invisible radiation which in many respects resembles Rntgen rays, and can affect a photographic plate after passing through thin plates of metal.
Here, the doctor inserts a probe into the ear which emits a tone with a certain amount of sound energy.
I admit something truly strange is happening and it appears to result from a combination of Howie's... uniqueness and the power source my equipment emits.
If a luminous body is surrounded by empty space, the light which it emits suffers no loss of energy as it travels outwards.
If the day and the night are such that you greet them with joy, and life emits a fragrance like flowers and sweet-scented herbs, is more elastic, more starry, more immortal--that is your success.
In Baluchistan these volcanoes appear to be extinct; though the Koh-i-Tafdan, beyond the Persian frontier, still emits vapours at frequent intervals.
In fact, the average home emits more harmful carbon dioxide gas than the average car every year.
In feng shui, crystals are said to be one of those rare objects that emits positive energy, while at the same time, deflecting negative energy.
In his optical researches, Optiska Undersiikningar, presented to the Stockholm Academy in 1853, he not only pointed out that the electric spark yields two superposed spectra, one from the metal of the electrode and the other from the gas in which it passes, but deduced from Euler's theory of resonance that an incandescent gas emits luminous rays of the same refrangibility as those which it can absorb.
In its period of 406 days it fluctuates between the thirteenth and the fourth magnitudes; thus at maximum it emits 4000 times as much light as at minimum.
In the wild state it does great damage among poultry, and frequently makes off with the young of swine and sheep. When hunted it makes a determined resistance, and emits a scent so strong as even to sicken the dogs, who nevertheless are exceedingly fond of the sport, and cannot be got to pursue any other game while the stench of the zibeth is in their nostrils.
In this case the companion, being about half the mass of Sirius itself, has probably cooled more rapidly, and on that account emits much less light.
Instead she emits a bloodcurdling squeal, accompanied by a torrent of tears.
It also shows that the black body emits at a peak wavelength, at which most of the radiant energy is emits at a peak wavelength, at which most of the radiant energy is emitted.
It comes complete with a fun key charm and emits a rustic air with the addition of an encompassing stud detail.
It emits bleeps at half-second intervals and has a range of between 20 and 30 meters.
It is divided into three parts, separated by walls, and each containing a lake, of which the middle one emits steam and the two others are cold.
No conclusion can therefore be drawn, as Stark' has more recently pointed out, respecting the charge of the molecule which emits the observed spectrum.
Please note that Vitagnost Highlight emits cold laser light emits cold laser light that does not heat the treated tissues.
Potassium nitrate is chiefly used to make nitre paper, which on burning emits fumes useful in the treatment of the asthmatic paroxysm.
Precise conclusions are possible only when a gaseous body is transparent through and through, so that the gas emits its characteristic rays - or when the rays from an incandescent body of any kind pass through a gaseous envelope at a temperature lower than that of the body itself.
Ruapehu (9100 ft.) is intermittently active, and Ngauruhoe (75 1 5 ft.) emits vapour and steam incessantly.
She uses a sonar system that emits sound waves.
Standard paint frequently emits Volatile Organic Compounds (VOCs).
That substitution creates a vacancy similar to a hole in a p-type semiconductor, which emits single photons when excited by a laser.
The 'carbon footprint ' is a calculation of how much carbon the pub emits during day to day operations.
The "singing beach" is a stretch of white sand, which, when trodden upon, emits a curious musical sound.
The first group, named the " luminophore," is such that when excited by suitable aetherial vibrations emits radiant energy; the other, named the " fluorogen," acts with the luminophore in some way or other to cause the fluorescence.
The great plain in Sheng-king is in many parts swampy, and in the neighbourhood of the sea, where the soil emits a saline exudation such as is also common in the north of China, it is perfectly sterile.
The indentation effect might even be at work in the way porous silicon (with a myriad of nanoscopic filaments) emits light.
The male organ (antheridium) consists of a few cells, the terminal one of which either abstricts from its end, or emits from its interior the non-motile spermatia, reminding us of those of the Florideae.
The name skunk itself points to a USA connection (being so-called because of the pungent odor it emits while growing ).
The name Skunk itself points to a USA connection (being so-called because of the pungent odor it emits while growing).
The oil when brought to the surface has the appearance of a whitish-blue water, which gives out brilliant straw-coloured rays, and emits a strong pungent odour.
The plant emits a stench to attract decaying flesh-eating beetles, flies and sweat bees for pollination.
The whole plant emits a disagreeable odour.
They consist of a so-called "frond" - a flattened green more or less oval structure which emits branches similar to itself from lateral pockets at or near the base.
This can be bothersome to some, particularly if the noise emits from an electronic machine.
This results in a rock-like crystal that, when heated, emits vapors that are smoked.
This small device (shown on the right) emits bursts of ultrasound when the integral movement sensor detects something moving.
We know from classical electrodynamics that an accelerated charge emits radiation.
When a gas is heated or a large electric current is passed through it, the gas emits a characteristic line spectrum.
When heated or rubbed it emits a peculiar disagreeable odour.
When injected as synthetic mRNA, its protein emits intense fluorescence in living embryos.
When one of the UV air sanitizers on the market is installed in a home, office, or other type of commercial building, the device emits a light that cleans the air and reduces the number of microorganisms present.
You can find out whether your air purifier emits ozone by performing a home test.