A scream (/skriΛm/ ) is a loud/hard vocalization in which air is passed through the vocal cords with greater force than is used in regular or close-distance vocalisation. This can be performed by any creature possessing lungs, including humans.
A scream is often an instinctive or reflex action, with a strong emotional aspect, like fear, pain, annoyance, surprise, joy, excitement, anger, etc.
The Scream is an art composition created by Norwegian artist Edvard Munch in 1893. The Norwegian name of the piece is Skrik ('Scream'), and the German title under which it was first exhibited is Der Schrei der Natur ('The Scream of Nature'). The agonized face in the painting has become one of the most iconic images in art, seen as representing a profound experience of existential dread related to the human condition. Munch's work, including The Scream, had a formative influence on the Expressionist movement.
Munch recalled that he had been out for a walk at sunset when suddenly the setting sun's light turned the clouds "a blood red". He sensed an "infinite scream passing through nature". Scholars have located the spot along a fjord path overlooking Oslo and have suggested various explanations for the unnaturally orange sky, ranging from the effects of a volcanic eruption to a psychological reaction by Munch to his sister's commitment at a nearby lunatic asylum.
The human voice consists of sound made by a human being using the vocal tract, including talking, singing, laughing, crying, screaming, shouting, humming or yelling. The human voice is specifically a part of human sound production in which the vocal folds (vocal cords) are the primary sound source. (Other sound production mechanisms produced from the same general area of the body involve the production of unvoiced consonants, clicks, whistling and whispering.)
Generally speaking, the mechanism for generating the human voice can be subdivided into three parts; the lungs, the vocal folds within the larynx (voice box), and the articulators. The lungs, the "pump" must produce adequate airflow and air pressure to vibrate vocal folds. The vocal folds (vocal cords) then vibrate to use airflow from the lungs to create audible pulses that form the laryngeal sound source. The muscles of the larynx adjust the length and tension of the vocal folds to 'fine-tune' pitch and tone. The articulators (the parts of the vocal tract above the larynx consisting of tongue, palate, cheek, lips, etc.) articulate and filter the sound emanating from the larynx and to some degree can interact with the laryngeal airflow to strengthen or weaken it as a sound source.