He recommends staying well hydrated , not screaming or yelling , using microphones and other amplification when speaking or performing in front of a crowd , not smoking , using good breath support when you speak by filling your lungs with air regularly , and warming up the voice before using it with exercises such as tongue trills and humming 他建议平时应多喝水；不要尖声或大声叫喊；进行演讲或演出时应使用话筒或其他扩音设备；不要吸烟；讲话时注意调匀呼吸,这样嗓子就会比较省力；用嗓前作些卷舌发音或是小声哼唱之类的“热嗓”运动。
The current studies on query by humming focus on humming in special way and approximate string matching . little attentions are put on humming in continuous way , and even using the continuous input method , the matching is still based on the sequence of pitches which has not been processed first 目前对哼唱音乐检索的研究大多把重点放在特定哼唱输入方式和字符串之间的模糊匹配上,对于连续哼唱输入方式的研究较少,即使采用了连续哼唱输入方式,也是直接提取哼唱输入的基频轨迹进行匹配,缺少对基频轨迹预处理的研究。
