 say and here also is another reason which is that the perception of sound is only accomplished by the nerves reaction to the undulation of the stagnant air in the ear in accordance with the undulation of the air carrying the sound and this undulation is not without percussion. if his nerve were very soft it would be harmed by that and by the nature of that air in its heat and cold and likewise the perception of taste is not possible.
أقول وها هنا أيضا سبب آخر وهو أن إدراك الصوت إنما يتم بانفعال العصب عن تموج الهواء الراكد في الأذن تبعا لتموج الهواء الحامل للصوت، وهذا التموج لا يخلو من قرع فلو كان عصبه لينا جدا لتضرر بذلك وبكيفية ذلك الهواء في حره وبرده ولا كذلك إدراك لطعم.