In October 2012, the National Synchronized Swimming Championships was held at the Swimming Pool of Shenyang Olympic Sports Center. A high-definition OB van was used to broadcast a live broadcast of the collective free-choice competition on October 18. This broadcast is a serious challenge for the recording car technicians who have never conducted a water project retransmission work. It is also an accumulation process of experience. Our broadcast department attached great importance to this broadcast work. From the collection of broadcast materials, the on-site survey, the preparation of the broadcast program, the preparation of the broadcast equipment to the practice of the live broadcast program, all of them were carefully and meticulously completed, and the relay task was successfully completed.
When receiving the broadcast task, the first thing to do is to have a certain understanding of the game project and the broadcast mode. This requires finding relevant information. Two days of online search, although we have a simple understanding of the synchronized swimming competition project, but did not find any reference materials related to the audio of the synchronized swimming competition, which determines that we must "touch" Stone crossing the river, according to their own broadcast experience, develop a broadcast program.
Synchronized swimming is a women's sports project. Flower athletes and music show a variety of beautiful movements and shapes in the water, which brings a wonderful enjoyment to the audience, so it has the reputation of “water balletâ€. It also requires strength and skill, and it takes many years of continuous training to master. Athletes must make many sets of pushes, spins, and bends, all of which cannot be done with the help of the bottom of the pool (Figure 1). In the Olympic Games, the synchronized swimming competition pool is at least 20 meters wide and 30 meters long. In the 12 meters wide and 12 meters long area, the water depth must reach 3 meters. The temperature of the water should be 26 ° C with an error of ± 1 degree. The water must be very clean and crystal clear.
Synchronized swimming competition venue
One week in advance, we went to the broadcast site to conduct a site survey, listened to the introduction of the venue and the organizers of the competition, and learned that the competition venue is an international standard swimming pool, 50 meters long and 25 meters wide. During the competition, the 30*25m section of the pool is used, and a starting block is set up in the center of the pool. The athletes need to go through the starting platform for the upper and lower courts, and listen to the results and awards on this starting platform.
The management of the game site is relatively strict. The erection of the live microphones and the laying of cables are strict. It must not affect the work of the athletes and the staff. At the same time, the TV screens are also required to be as clean and tidy as possible. Therefore, it is decided to simplify the erection effect microphone, scientifically and reasonably arranged, and try to transmit audio signals wirelessly to minimize the laying of field cables.
Super-pointing microphone for the foot of the field
It mainly uses 4 super-directional microphones, which are arranged on the 4 corners of the competition venue, pointing to the water surface of the players in the competition performance. The main picking players jump into the water, tapping the water surface when doing the action, and the players issuing the action instructions and other sounds. I hope that I can pick up the gasping of the players and so on. Since two of the microphones are located on both sides of the performance stage, it is also desirable to be able to pick up the reaction sounds of the athletes when they go to the field.
Synchronized swimming requires athletes to express their understanding of the meaning of the soundtrack through the expression of body language. In the whole set of movements, the strength and speed of the movements are echoed with the soundtrack. Therefore, the athletes are very important in grasping the music on the spot. .
Connect live sound mixing console
In order to highlight the important role of live music in the competition, TV viewers can enjoy beautiful games while listening to clear music, and in order to adjust the ratio of live music to live environment sounds in time to make them visible to TV viewers. The video images are coordinated and coordinated with the live sound reinforcement staff to determine the connection signal of the live sound reinforcement system and connect the signal to the OB car system via the audio cable.
In the optional action game, the average volume should not exceed 90 decibels, and the instantaneous bursting sound should not exceed 100 decibels. During the actual broadcast, it was found that the live music sounded so loud during the game that the live game sounds picked up from the live effect microphones were very small, and only a clear game scene sound could be sent out during the music gap. Therefore, what the tuner has to do is to send a clear music signal from the field sound reinforcement system while the game is being played, and to send the live sound received by the field microphone at the right time when the music stops and weakens, to render the TV effect. This type of tuning is just right for the adjuster to adjust the timing, size, and proportion of the signal, which requires multiple training and experience accumulation.
Many of the athlete's movements in the game need to be done underwater with the music, so it is necessary to ensure that the athlete can clearly hear the music under water. The use of underwater speakers allows the athlete to clearly hear the music under the water, and to keep up with the music rhythm and keep pace with the partner.
Layout underwater microphone
The OB video system is connected to the underwater camera, so when switching to the underwater performance lens, if you send out the underwater sound, you will have a feeling. Therefore, the AT880 omnidirectional dual-powered piezoelectric microphone of two underwater pickup microphones audio-technica is placed underwater, and the wall of the swimming pool is placed 1.5 meters below the surface of the swimming pool to pick up the sound of the players during underwater performance. And can feel the sound of underwater music.
Due to lack of experience, the microphone is not fixed to the wall of the pool, and the depth of falling into the water is not enough. As a result, sometimes the splash of the athlete's action causes the microphone to hit the wall of the pool, causing a "squeaky" sound, which affects the sound when sending underwater sound. Listening effect. Need to pay attention to the future broadcast.
Strictly speaking, the audience watching the synchronized swimming competition, from the athletes preparing for the action by the pool, to the athletes to complete the competition, and finally to the referee and the audience in the pool, during which the audience should not make a sound. Because there is music in between, applause and applause will make the athletes have an influence on the judgment of the rhythm. If the audience wants to applaud, it should be after the athlete completes the full set of actions, after the end of the live music.
Because the live camera is equipped with a directional head microphone, it can be used to pick up the reaction sound of the audience and the reaction sound of the players approaching the camera when they are on the field. At the same time, in order to keep the scene safe and tidy, there is no special spectator area pickup microphone. This requires the tuner to position the camera on the scene. When switching to the viewer's screen, the camera microphone sound that is close to or pointing to the corresponding audience area can be sent out in time to achieve the purpose of unified sound and picture, and the TV viewer is present. The feeling of its situation.
Live commentary
For the synchronized swimming sports, the popularity is not too high, so watching the flower tour competition, especially watching the flower tour competition through TV, the audience has a relatively large dependence on the live commentary. The audience needs to know about the competition items, the rules of the game, the status of the competition and the judgment of the results of the competition. Therefore, we focused on the design of this part of the system, using Beyerdynamic's DT190 live comment headset 2 sets, respectively connected to the audio cable interface box through Sound Devices' MM-1 DC microphone amplifier, and sent the commentator's voice to the OB car system. The return signal sent from the OB van is sent from the interface box to the headphone amplifier and connected to the headphone input of the commenter's headset. The voices of the two commentators were sent to the OB van via the audio cable in two ways. This is to make the voices of the two commentators different according to the different voice characteristics of different commentators in different scene environments. Corresponding adjustments and modifications. Similarly, the return signal sent to the commentator's earphone is also sent through different lines, so that different sound signals sent to the earphone can be adjusted accordingly. For example, the guide can give an instruction to a commenter through the earphone without affecting the other. a commentator. (Figure 5)
In order to reduce the amount of on-site cable laying, the sound signals collected by the erection microphones on the site are all transmitted by wireless transmission. This time, LECTRO's HM grenade transmitter and SRa5p grenade receiver are used for a total of 6 sets. audio signal. At this point, the 6-channel live microphone signal, the 2-way commentary sound signal, the 2-way live sound reinforcement system signal, plus the 2-way monitor signal sent back to the commentator, a total of 12 audio signals are all connected to the OB van via an audio cable. The system realizes the design principle of the audio system which is not only focused, but also simple, safe and beautiful.
Timely broadcast summary can enable us to accumulate experience even if we accumulate experience and improve it in future work. At the same time, I hope to be able to listen to the guidance of the predecessors, and have the opportunity to communicate with their peers and gain experience in the future to broadcast high quality similar projects.
Signal equipment brand model connection cable
Competition sound gun type super pointing microphone SCHOEPS CMIT 5U grenade launching receiver 1
Competition sound gun type super pointing microphone SCHOEPS CMIT 5U grenade launching receiver 2
Competition sound gun type super pointing microphone SCHOEPS CMIT 5U grenades launching receiver 3
Competition sound gun type super pointing microphone SCHOEPS CMIT 5U grenade launching receiver 4
Underwater sound piezoelectric microphone audio-technica AT880 grenade launcher 5
Underwater sound piezoelectric microphone audio-technica AT880 grenade launch receiver 6
Comment Sound Live Comments Headset Beyerdynamic DT190 Microphone Amplifier 7
Comment Sound Live Comments Headset Beyerdynamic DT190 Microphone Amplifier 8
Listen to the sound live comment headset Beyerdynamic DT190 headphone amplifier 9
Listen to the sound live comment headset Beyerdynamic DT190 headphone amplifier 10
Sound reinforcement system audio isolation transformer NEUTRIK audio line 11
Sound reinforcement system audio isolation transformer NEUTRIK audio line 12
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