氧气声测管在检测时之所以会发热，是因为氧气声测管里有钛元素。当氧气分子与钛的颗粒接触吸附，在发作变色的同时，也会放出热量。
 
    声测管里面装填的检测试剂，比如，二氧化碳声测管里面的白色部分，氧气声测管里面的黑色部分。当被检测的气体与试剂接触。会发作化学反响，惹起颜色变化。也就是说，一旦被检测的气体经过声测管，颜色发作变化就说明气体的存在以及它的浓度。可以作更进一步的解释:
发作颜色变化的真正缘由是声测管里面的检测试剂与气体接触时，发作的化学反响，从而生成了另外一种不同的物质。
 
    例如，当二氧化碳声测管里面的白色试剂接触到二氧化碳气体时，发作变化生成了另外一种紫色的物质。当氧气声测管里面的黑色试剂与氧气接触时，发作变化生成了另外一种白色的物质。
 
    当然，会有一些气体声测管和以上不同，变化过程有一些差别。

Acoustic detection tube will be fever, because oxygen with titanium. When contact with titanium particles adsorbed oxygen molecules, and at the same time of attack change color, also gives off heat.
Acoustic detecting tube filling inside detection reagent, such as, acoustic detection tube inside the white part of carbon dioxide, oxygen tube inside the black part. When tested gas in contact with the reagent. Chemical reactions will attack, make up the color changes. That is to say, once detected acoustic detecting tube, gas after onset of color change is a sign of the existence of gas and its concentration. Can make a further explanation:
Acoustic detection tube color changes in the real reason is the detection reagent, when in contact with gas inside the onset of chemical reaction, resulting in a different matter.
As carbon dioxide, for example, the inside of the tube white reagents in contact with the carbon dioxide gas, attack change created another purple material. When oxygen tube inside black reagents, when in contact with oxygen attack change created another white material.
Of course, there will be some gas tube and more different, change process have some difference.