Sound is produced.
Vocal cords vibrate and produce sound.
some people seem to think that it is you lose your voice but it actually only a ripping to the vocal cords when you stretch them out that will heal over time
Work is something that is done when a force moves an object over a distance.
Dynamics
the warm air rises up and moves over the cold air that is already there.
Work is said to be done by the force.
The vocal cords vibrate when air passes over them. This produces the sound of your voice.
Speech therapists will tell you that the vocal cords are not affected by whistling. The whistle, itself being made by the way you vary the air through your lips , may not affect your vocal cords, but you can't whistle without passing air over your vocal cords.
some people seem to think that it is you lose your voice but it actually only a ripping to the vocal cords when you stretch them out that will heal over time
Your vocal cords - are two strips of skin located at the top of the larynx. When air passes over them, they vibrate - combined with the shape of your mouth, and breathing method - they produce sound.
Chronic: recurring over and overLaryngitis: inflammation of the larynx, where your vocal cords are
Speech is created by forcing air over the vocal cords. The vibrations of the vocal cords causes sound waves that are modulated by the position of the lips and tongue to produce audible sound that issues from the mouth. Over time, these sounds have been formed into the many languages we hear round the world today.
The respiratory structure that allows speech is the vocal cord which is located in the throat. Exhaled air that runs over the vocal cords is what will result into speech.
Larynx & Vocal Cords, The Larynx is more commonly called the VOICE BOX. It sits superior to and is continuous with the TRACHEA or WIND PIPE. It's functions to move air in and out of the trachea and to produce the sounds of a person's voice The lower vocal cords are called TRUE vocal cords because muscles stretch and relax them to produce DIFFERENT types of sounds.
Being overtired itself doesnt stress the vocal folds (cords). However, general stress (which being over tired can relate to) can effect use of the vocal folds and how stressed they are. Every day usage damages the vocal folds and this daily damage from vibration is repaired primarily while sleeping. So, lack of sleep will reduce the repair time as well as reduce the body's efficiency in repairing damage. see www.ncvs.org for more info like this.
The Lungs pass air over the Larynx, (Vocal Chords) in the throat, which vibrates. This vibration of the air is detected as sound waves in the ear of the recipient.
When air from the lungs is passed over the vocal cords inside the larynx, they vibrate. This makes a sound. The vocal cords are tightened or relaxed to change their length. This changes the speed of vibration which alters the pitch. If only the larynx is involved, the sound comes out as a dull 'aaah' in varying pitch. No recognisable words can be formed without the use of the lips, teeth, tongue and palate. This is why people with serious facial injuries or with many teeth missing often have trouble speaking or being understood.
vocal chords are not elements Inhaling helium (because of its lightness and density compared to air) does just that. Because helium, being lighter and less dense than (mostly nitrogen) air which is normally exhaled over the vocal cords, offers less resistance to the movement of the vocal cords, the cords are then able (with the same degree of tension as is imparted by ordinary conscious effort) to vibrate more rapidly, this creating higher sound frequencies than intended.