一、在生源处减弱:禁止或者减弱声音的产生(影响声音的产生),如:市区禁止鸣笛,考场禁止喧哗,汽车安装消声器。例1(2013年威海中考)通常人们会从噪声的产生、传播及接收三个环节控制噪声。下列措施中,属于在产生环节控制噪声的是:()A.临街的房屋安装隔音玻璃;B.学校附近禁止汽车鸣笛;C.在高噪声环境下工作的人戴耳罩;D.在城市道路旁安装隔声板。分析:减弱噪声主要从三种途径入手,一是在声源处(即产生处) First, weakened at the source: prohibit or weaken the sound (affect the sound), such as: the urban area is prohibited whistle, the examination room is noisy, the installation of muffler car. Example 1 (2013 Weihai Senior High School Entrance Examination) Normally people control the noise from the three aspects of noise generation, transmission and reception. Among the following measures, which belong to the noise control during production: (A). Acoustic glass for houses in the street; B. Forbidden car whistles near the school; C. For people working in noisy environments, wearing ear muffs; Acoustical panels are installed next to city roads. Analysis: to reduce noise mainly from three ways to start, one at the sound source (that is generated)