【實用音樂app】Laugh Sounds|最夯免費app-綠色工廠好玩App

The Best App in the Android market. Loud Sounds Free on an funny app.

Press and hold on icon for features!

Laugh Sounds Free is the best app sounds.

- Surprise people, friends and others with funny loud sounds.

- Save sounds how ringtones or notifications.

- One Click to play sound;

- Diferents sound playing at same time.

- Many different sounds FX:

-) Kids Laughing, Comic, Scooby, Ben 10, Elmer laugh, Hysterical, Drumroll and many excelents sounds.

These sounds are useful and friendly with all age group of people.

Make everyone around you laugh with these funny sounds anytime of the day.

- Excellent App for Kids, Kids love this App like a Game.

Laughing is a physical reaction in humans, consisting typically of rhythmical, often audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can arise from such activities as being tickled,[1] or from humorous stories or thoughts.[2] Most commonly, it is considered a visual expression of a number of positive emotional states, such as joy, mirth, happiness, relief, etc. On some occasions, however, it may be caused by contrary emotional states such as embarrassment, apology, or confusion "nervous laughter" or courtesy laugh. Factors such as age, gender, education, language, and culture are factors[3] as to whether a person will experience laughter in a given situation.

Laughter is a part of human behavior regulated by the brain, helping humans clarify their intentions in social interaction and providing an emotional context to conversations. Laughter is used as a signal for being part of a group — it signals acceptance and positive interactions with others. Laughter is sometimes seen as contagious, and the laughter of one person can itself provoke laughter from others as a positive feedback.[4] This may account in part for the popularity of laugh tracks in situation comedy television shows.

The study of humor and laughter, and its psychological and physiological effects on the human body, is called gelotology.

A link between laughter and healthy function of blood vessels was first reported in 2005 by researchers at the University of Maryland Medical Center with the fact that laughter causes the dilatation of the inner lining of blood vessels, the endothelium, and increases blood flow.[16] Drs. Michael Miller (University of Maryland) and William Fry (Stanford), theorize that beta-endorphin like compounds released by the hypothalamus activate receptors on the endothelial surface to release nitric oxide, thereby resulting in dilation of vessels. Other cardioprotective properties of nitric oxide include reduction of inflammation and decreased platelet aggregation.[17][18]

Laughter has also been shown to have beneficial effects on various other aspects of biochemistry. For example, laughter has been shown to lead to reductions in stress hormones such as cortisol and epinephrine. When laughing the brain also releases endorphins that can relieve some physical pain.[19] Laughter also boosts the number of antibody-producing cells and enhances the effectiveness of T-cells, leading to a stronger immune system.[20]