Is it rude to burp loudly in public? YES it is. Especially when your in a restaurant too. Making other people lose their appetite is certainly rude.
Burping is seen (and heard) as rude and crude. But burping (or belching) serves an essential purpose and shouldn't be silenced. Belching is a protective mechanism that prevents the stomach from overinflating.
Trapped behind that sphincter muscle, the gas builds up a lot of pressure. It's really hard to hold back a burp. When it finally forces its way through, the high-pressure air makes the structures in the upper esophagus and back of the throat vibrate – and that's what causes the sound.
Burping isn't considered rude at all. If you burp after a meal, it signifies your enjoyment of the food, and is a compliment to the chef.
It is OK to burp in public, but please pardon yourself:
"Australians often say, 'excuse me' to get a person's attention and 'sorry' if they bump into them. They also say, 'pardon me' or 'excuse me' if they burp or belch in public or in a person's home." This is slightly confusing.
When eating from shared dishes (as it is commonly done at some restaurants such as izakaya), it is polite to use the opposite end of your chopsticks or dedicated serving chopsticks for moving food to your own dish. Blowing your nose at the table, burping and audible munching are considered bad manners in Japan.
Society and culture
Burping during a meal is also considered unacceptable in Western cultures, such as North America and Europe. In Middle Eastern countries, it is not acceptable to burp out loud in public, and one should silence one's burp, or at least attempt to do so.
In China, burping isn't considered rude. In fact, it's actually a sign of gratitude to the cook and satisfaction with the meal. It's a great compliment, so don't be surprised when you hear a burp or two at the dining table.
There's nothing improper about burping itself, whether you say “excuse me” or not. That said, if you were mid-sentence when the burp came out or if your burp disrupted whatever else was happening, then it's appropriate to say “excuse me” for the interruption or for causing a disturbance.
Misophonia is characterized by intense emotion like rage or fear in response to highly specific sounds, particularly ordinary sounds that other people make. The cause is unknown.
Neville Sharp (Australia) has achieved the loudest burp (male), breaking a record which has stood for over a decade. Neville's mighty burp was registered at 112.4 decibels (db) in Darwin, Northern Territory, Australia, on 29 July 2021.
Burping and slurping at the dinner table. In China and Taiwan, burping is the highest form of flattery—it means you like the food! “The host considers the noise a compliment,” says Patricia Napier-Fitzpatrick, founder and president of the Etiquette School of New York.
However, it is not polite in Japan to burp, nor is it polite in China to slurp. It's probably for the best that you keep these two rules straight in your head.
Egypt. Contrary to the West, where burping after a meal is considered rude, in Egypt burping loudly after a meal is considered good dining etiquette and signifies your appreciation of the food you've just eaten.
Do not spit. Spitting in the street is considered to be very bad mannered. You may feel better by burping loudly after eating or drinking, but other people will not! If you can not stop a burp from bursting out, then cover your mouth with your hand and say 'excuse me' afterwards.
Whitson defines rude as, “inadvertently saying or doing something that hurts someone else". These may be seen as social errors such as, burping in someone's face, cutting in line, or kicking a ball at someone. The problem with this is that rude situations are often spontaneous.
Eating Culture and Etiquette. In general, Americans eat quietly with their mouths closed. Burping is seen as rude, not as a compliment to the cook.
It can announce its presence with an unapologetic, thunderous sound or a lingering, comedic melody. Sometimes, much to the relief of the perpetrator, it can stealthily go unnoticed. It's considered both rude and crude — something you simply shouldn't do around other people.
When eating soup or other food served with bowl and spoons, the spoon is always pushed away from oneself, rather than being drawn toward oneself. Food is never slurped. This stems from aristocratic views that drawing the spoon toward oneself portrayed negative images of either hunger or gluttony.
The rotten egg smell associated with sulfur burps comes from hydrogen sulfide gas. When bacteria in the mouth and digestive system break down food, new compounds form. Hydrogen sulfide is one of the byproducts of digestion.
Don't burp: In some countries, for example in India, burping is a sign of satisfaction and satiety. But in Italy, it's unacceptable. Basically, you should avoid every loud sound—slurping is another good example.
Fortunately, your smile is unlikely to be considered rude or offensive, but it might cause misunderstanding since it is not a part of Japanese culture.
Always finish your meal!
The Japanese consider it rude to leave food on your plate, and even more so to order more food when you haven't finished everything you've already got. This is related to one of the fundamental concepts in Japanese culture, mottainai, which is a feeling of regret at having wasted something.