On Development of Starting with Electronic sound for Track and Field

目前田径运动会上使用的机械控制的手枪发令器在使用中似乎有许多缺点。问题之一是，例如当手枪发射时，秒表不是同时启动，而是有延迟（不同步）。我们希望把这个系统改为电子控制系统。我们的最终目标是同步，启动秒表并在结束时终止秒表。第一次尝试是解决起点和电子设备的问题。我们的设计能够克服机械系统的问题。这种新设计的系统曾在神户大学生运动会（田径）和第41届全国田径运动会（田径）上使用。除了一个问题外，几乎所有与机械系统的短路都得到了解决。在"第41届公众大会"上，地面亭不是抛物线形的，而是一个平面。那里的声音是不是一个有效的回声声音休息 ...更多信息 使声音非常低，不能被正确地听到。作为一种解决听众扬声器系统的使用和必要。声音是实现了，但系统，因为非常大。后来，一个扬声器是专门制作的，它可以传播声音的各个方向和分离器被用来偏离声音到不同的方向。分离器位于喇叭零声阻抗点的上方。该扬声器与电子声音陈述系统一起使用。其结果是，从来没有任何回声健全的说明系统。结果是，没有任何回音，扬声器的声音在各个方向都能听到。这个系统可以作为一个启动系统曾经在一个开放的体育场没有任何问题。研究人员之一Tadanobu N aki博士（日本Amteur田径联合会评判委员会成员）推荐这是一个完美的系统，可以取代机械系统。我们希望将此系统连接到视频集，停止手表等。.并且还检查在事件开始时的"犯规开始"。少

Presently used pistol fire starters at track and fild meets which are mechanically controlled seems to have many short commings in its operations. One of the problems for example in when the pistol is fired, the stop watch is started not at the same time but with a delay (not synchronized). We hope to change this system to an electronically controlled one. Our ultimate objective is to synchronize, to start the stop watch and to terminate the stop watch at finish. First attempt is to solve the problems at the starting point and the electronic equipment. We designed was able to overcome the problems with the mechanical system. This newly designed system was used at the "Universiade kobe (Track and Field)" and at the "41st National Geame (Track and Field)". Almost all the short commings with the mechanical system were solved except one. at the "41st Public Meet" the ground pavillion was not parabolically shaped but was a flat one. There for the sound was not an effective echoing sound res … More ulting the sound to be very low and was not properly heard. As a solvtion for the audience speakers system used and the necessary. Sound was achieved but the system because very large. Later one speaker was specially made which could spread sound in all direction and separater were used to deviate the sound to different direction. The separater were positioned above the zero suond impedance point of the horn. This speaker was used with the electronic sound stating system. The result was that ever without any echoing soune stating system. The result was that ever without any echoing sound the speaker sound was heard in all direction. This system could be used as a starting system ever in an Open Stadium without any probiems. One of the reseachers who worked on this equipment Dr Tadanobu N aki(Member of a Judgement Committee Japan Amteur Athletic Federation) recommended this as a perfect system to replace the mechanical system. We hope to connect this system to Video sets, stop watches ets... . and also to check "foul starts" at the start of an event. Less