It is now known that the sound is produced by expelling air from the oesophagus with the aid of powerful muscles surrounding it.
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When irritated they growled fiercely. When on the prowl they periodically uttered a series of low grunts or a hissing sound made by expelling air through partially opened lips. The binturong uses the tail to communicate. It moves about gently, often coming to a stop, and often using the tail to keep balance, clinging to a branch.
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The pups learn how to swim in the surf and eventually swim farther to forage. Thus, their first long journey at sea begins. Elephant seals communicate though various means. Males will threaten each other with the snort, a sound caused by expelling air though their probosces, and the clap- trap, a loud, clapping sound comparable to the sound of a diesel engine.
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These moths have several unusual features. All three species have the ability to emit a loud chirp if irritated. The sound is produced by inhaling and expelling air, which vibrates the epipharynx like an accordion, often accompanied by flashing of the brightly colored abdomen in a further attempt to deter predators. The chirp of the death's head hawkmoth takes approximately one-fifth of a second.
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The adult moth is nocturnal, active mainly during the early hours of the night. The caterpillar feeds on alder (Alnus), hickory (Carya), hazelnut (Corylus), beech (Fagus), walnut (Juglans), and hop-hornbeam (Ostrya) species. When attacked by a bird, the caterpillar produces a high-pitched whistle by expelling air from pair of spiracles in its abdomen. This antipredator adaptation may startle the bird, which may then reject the caterpillar.
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North American river otters can produce a snarling growl or hissing bark when bothered, and a shrill whistle when in pain. When at play or traveling, they sometimes give off low, purring grunts. The alarm call, given when shocked or distressed by potential danger, is an explosive snort, made by expelling air through the nostrils. North American river otters also may use a birdlike chirp for communication over longer distances, but the most common sound heard among a group of otters is low-frequency chuckling.
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Sound is produced simply by expelling air from the lungs. However, to vary the sound quality in a way useful for speaking, two speech organs normally move towards each other to contact each other to create an obstruction that shapes the air in a particular fashion. The point of maximum obstruction is called the place of articulation, and the way the obstruction forms and releases is the manner of articulation. For example, when making a p sound, the lips come together tightly, blocking the air momentarily and causing a buildup of air pressure.
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Parrots do not have vocal cords, so sound is accomplished by expelling air across the mouth of the trachea in the organ called the syrinx. Different sounds are produced by changing the depth and shape of the trachea. Grey parrots are known for their superior ability to imitate sounds and human speech, which has made them popular pets since ancient times. Although most parrot species are able to imitate, some of the amazon parrots are generally regarded as the next-best imitators and speakers of the parrot world.
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Dizi are often played using various "advanced" techniques, such as circular breathing, slides, popped notes, harmonics, "flying finger" trills, multiphonics, fluttertonguing, and double-tonguing. Most professional players have a set of seven dizi, each in a different key (and size). Additionally, master players and those seeking distinctive sounds such as birdsong may use extremely small or very large dizi. Circle Breathing is a technique characteristic of wind instruments such as the Dizi, in which the performer breathes through the nose while expelling air through the mouth at the same time to create a continuous sound.
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A stovetop pressure cooker Pressure cooking is the process of cooking food under high pressure steam, employing water or a water-based cooking liquid, in a sealed vessel known as a pressure cooker. High pressure limits boiling, and permits cooking temperatures well above to be reached. The pressure cooker was invented in the seventeenth century by the physicist Denis Papin, and works by expelling air from the vessel, and trapping the steam produced from the boiling liquid inside. This raises the internal pressures and permits high cooking temperatures.
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With their immobile rib-cage, Testudines have had to evolve special adaptations for respiration. Turtle pulmonary ventilation occurs by using specific groups of abdominal muscles attached to their viscera and shell that pull the lungs ventrally during inspiration, where air is drawn in via a negative pressure gradient (Boyle's Law). In expiration, the contraction of the transversus abdominis is the driving force by propelling the viscera into the lungs and expelling air under positive pressure. Conversely, the relaxing and flattening of the oblique abdominis muscle pulls the transversus back down which, once again, draws air back into the lungs.
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American toad, (Anaxyrus americanus) singing Frogs are much more vocal, especially during the breeding season when they use their voices to attract mates. The presence of a particular species in an area may be more easily discerned by its characteristic call than by a fleeting glimpse of the animal itself. In most species, the sound is produced by expelling air from the lungs over the vocal cords into an air sac or sacs in the throat or at the corner of the mouth. This may distend like a balloon and acts as a resonator, helping to transfer the sound to the atmosphere, or the water at times when the animal is submerged.
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