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Flask with smelling salts, used for reviving dental patients after a procedure. French, 18th century. Smelling salts have been used since Roman times and are mentioned in the writings of Pliny as Hammoniacus sal. [1]
In phonetics, ingressive sounds are sounds by which the airstream flows inward through the mouth or nose. The three types of ingressive sounds are lingual ingressive or velaric ingressive (from the tongue and the velum), glottalic ingressive (from the glottis), and pulmonic ingressive (from the lungs).
Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung sounds. [2]
The normal relaxed state of the lung and chest is partially empty. Further exhalation requires muscular work. Inhalation is an active process requiring work. [4] Some of this work is to overcome frictional resistance to flow, and part is used to deform elastic tissues, and is stored as potential energy, which is recovered during the passive process of exhalation, Tidal breathing is breathing ...
Inhalation of air, as part of the cycle of breathing, is a vital process for all human life.The process is autonomic (though there are exceptions in some disease states) and does not need conscious control or effort.
When inhaled, helium changes the resonant properties of the human vocal track resulting in a very high squeaky voice. In Salvatore Martirano's composition L’s GA the singer is required to inhale from a helium mask. Conversely, an unnaturally low voice may be achieved by asking the singer to inhale sulfur hexafluoride. This technique is less ...
Inhalant users inhale vapors or aerosol propellant gases using plastic bags held over the mouth or by breathing from an open container of solvents, such as gasoline or paint thinner. Nitrous oxide gases from whipped cream aerosol cans, aerosol hairspray or non-stick frying spray are sprayed into plastic bags.
To inhale from a charger, users either fill a balloon using a cracker, fill an empty whipped cream dispenser and inhale from it, or likewise use a dispenser to fill a balloon as the potentially rapid rush of gas from the spout of the dispenser may be too harsh.