Due to the particularity of the dance performance form in the square, the performance site is surrounded by audiences on three or four sides, the performance stage is integrated with the audience, and the performance site is crowded and lively. This makes the performance content of most square dances must be enthusiastic and cheerful, which is "emotional dance" in dance terminology. This form of performance determines that it is impossible for square dance to express sad content or very artistic works because of the special performance environment of square dance. Square dance is a beautiful scenery active in various cities, and it is also a fitness and slimming dance that city people like very much, so there is another dance called slimming dance in square dance.
Dancing is actually a kind of exercise. Exercise to lose weight can not only achieve the goal of losing weight fastest, but also enhance physical fitness and improve body immunity. Many friends participate in exercise to lose weight through slimming dance, and achieve unexpected weight loss effect. Square dancing has become a headache. Finding a balance point of "you dance happily and I sleep well" seems to be the Goldbach conjecture of urban management, which leads to vicious "cracking" means such as high-pitched guns, Tibetan mastiffs and mice. In order to solve the problem that square dancing disturbs people, some local cultural management departments have signed conventions on square cultural activities with representatives of cultural teams and citizens, restricting square cultural activities from the aspects of venue, duration, time slot and volume, and educating and punishing illegal teams, with obvious results.
The problem of square dance should not be unsolvable. Why is there confusion? The law enforcement office "moves", changing from decentralized law enforcement to joint law enforcement, effectively combining national laws and regulations with local facts, cruising back and forth in noisy places and places reported by the masses, floating and sinking, and law enforcement officers walk out of the office and actually arrive at the scene, so that abstract legal provisions and public policies can open the horizon of law enforcement, supplemented by sincere advice and persuasion, and different effects will appear. Active directional loudspeaker
At the 2nd International Expo of 20 14, scientists from Fudan University said that they had successfully invented the "forced stop artifact" of square dance noise-active directional speakers.
The sound emitted by ordinary speakers spreads in all directions. In order to achieve orientation, the diameter of the speaker must be very large. Different from the principle of traditional speakers, active directional speakers first load low-frequency sound signals on high-frequency signals with strong directivity, and then amplify them and emit them into the air. Then, the air will quickly filter the high-frequency signals, and the audible sound signals above will naturally be filtered out, realizing directional propagation like laser.
Active directional speakers can control sound waves in a specific area, where the sound waves are strong, and outside this area, the sound waves will be weak or even absent. If the square dancers use this horn to play music, the' embarrassment' of disturbing the people will be solved. "Ma Jianmin said. In addition to being the "forced stop artifact" of square dance noise, active directional speakers can also be used in advertising exhibitions, waiting halls, bus stops and other scenes to realize directional sound playback for specific people.