'Here... the cicadas sound different from in Tokyo.' 'Oh my, how observant. You have a good ear, dear.'
Literal
''Here [quotative-って]... cicada [possessive-の] voice [subject-が] Tokyo [with-と] different'' ''Oh-my, well noticed [feminine-こと]. You, good ear-sense doing-[state-ている] [feminine-わよ]''
A nature-sensitive observation. 蝉 (せみ) is 'cicada' — a symbol of Japanese summer soundscape. Japan has distinct cicada species audible by sound, so regional cicada soundscapes genuinely do differ. 音感 ('sense of pitch, ear for sound') typically refers to musical pitch sense. あらまっ is a feminine expression of mild surprise, with the っ adding emphasis. 貴女 (あなた written with the 'honored woman' kanji) is a refined feminine form of address.