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They vibrate irregularly at 20 – 50 pulses per second, about two octaves below the frequency of normal voicing, and the airflow through the glottis is very slow.
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They and vibrate
They vibrate, modulating the flow of air being expelled from the lungs during phonation.
They have no outer edge as they blend into the side of the breathing tube ( the illustration is out of date and does not show this well ) while their inner edges or " margins " are free to vibrate ( the hole ).
They are usually categorized by the technique used to make the strings vibrate ( or by the primary technique, in the case of instruments where more than one may apply.
They are typically not used in conjunction with a mouthpiece ; rather the two reeds vibrate against each other.
They include all idiophones which are made to vibrate by being hit, either directly with a stick or hand ( like the wood block, singing bowl, triangle or marimba ), or indirectly, by way of a scraping or shaking motion ( like maracas or flexatone ).
They also design structures to be stiff enough to not deflect or vibrate beyond acceptable limits.
They come in a variety of sizes ; some can vibrate.
They vibrate in such an orderly pattern because this is water frozen into the solid state of matter.
They also observed to vibrate their tails as if in a rattlesnake fashion when they feel threatened.
They and irregularly
They will kneel and plead for Boris' leadership in a strangely intense song, its phrases irregularly broken as if gasping for breath, but when the police with their cudgels move away, they mock and grumble and fight among themselves.
They moult their tail feathers irregularly and the flight feathers of their wings in stages, so that starting at the first moult, they always have some old feathers, some new ones, and some partly grown ones.
They have toured irregularly since.
They can also be used to implement triangular arrays, or other kinds of irregularly shaped arrays.
They may be ball-shaped, curly (" cheese curls "), straight, or irregularly shaped.
They can stain either gram positive or gram negative and may be spherical, rod-shaped, spiral, lobed, plate-shaped, irregularly shaped, or pleomorphic.
They grow in very arid areas which are subjected to deep cold in spots where water flows irregularly or depressions where water can accumulate for short period of time.
They practice, write, and perform very irregularly due to the members now being split between Chicago and Louisville.
They and at
They mounted up and rode slowly behind the others at a safe distance.
They poured through the opening in the valley, then spread out in a long line to come at us, brandishing their lances and filling the morning with their spine-chilling scalp cry.
They, and the two large fans which I could dimly see as daylight filtered through their vents, down at the far end of the hall, could be turned on by a master switch situated inside the office.
They stared at him.
`` They were supposed to meet Thor at nine PM for a conference concerning the ad campaign for their soap, a new angle based on this SX-21 stuff ''.
They came upon cheetal deer at woodland pools.
They include the Navy's Atlantic Command at Norfolk, Virginia, which is in contact with the Polaris subs ; ;
They are supplied, a batch at a time, by a secret source and are continually changed by Wisman or his staff, at random intervals.
They all swung at the same instant in the same direction.
They lay, with the birds hopping from branch to branch above them and the bright sky peeping down at them.
They had located the runway of a colony of ants and as the ants came out of the ground, the boys picked them up, one at a time, and pinched them dead.
They roll at night in ashes to keep warm and their second skin has a light dusty cast to it.
They have an ancestry extending back, however, at least to 1728, when William Byrd described the Lubberlanders he encountered in the back country of Virginia and North Carolina.
They were in fact quietly laughing at him, for their King wished to have nothing to do with the Western world.
They seemed to be at the White House half the time.
They had watered their stock at immense profit, then had raised the price of coal fifty cents a ton, netting themselves another $20,000,000 in annual profit.
`` They straggle at such a rate '', he told the commander-in-chief, `` that if the enemy were enterprising, they might get two from us, when we would take one of them, which makes me wish General Howe would go on, lest any incident happen to us ''.
They are enacted at the heart of the body politic.
They laughed and, true to national form and manners, never talked long or solemnly on any subject at all, but some of them worried out loud about short memories and ghosts.
They start on the East side of the Schuylkill, have to cross over to the West to use the expressway and cross over again to the East at their destination.
They ate the cafeteria food with its orange sauces and Scotty gazed without interest at his food, the teachers, the heroic baronial windows, and the bright ranks of college banners.
They lay on his lap, palms up, stiffly motionless, the tapered fingers a little thick at the joints.
They turned at the bottom of Kate's steps and moved off in the direction of the park.
They set bouncing betties to jump and explode at testicle level while we more mercifully had them go off at the head.
0.957 seconds.