Abu Yahya al-Saji (may Allah have mercy on him) narrated in his book, with a chain in which there is weakness, from Ubadah bin Nusayy, from Ibn Ghanm, from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him), from the Prophet (peace and blessings be upon him): "And for (destroying) the faculty of hearing there are one hundred camels (as blood money)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / Q16224
Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him): "For hearing, the blood money is 100 camels."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16224
Through this same chain it is narrated: "For (destroying) the intellect, the blood money is 100 camels." And it is reported from Sayyiduna Umar (may Allah be pleased with him) what indicates that he ruled the full blood money for hearing.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16225
Rabi'ah (may Allah have mercy on him) said that if the faculty of hearing is lost entirely, there is the full diyah for it; and he said that if the hearing of one ear is lost, there is half the diyah. And Makhul (may Allah have mercy on him) said that if the faculty of hearing is lost, there is the full diyah for it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16227