This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 聤 is uncertain. It visually combines 耳 (ear) with 亭, but the original semantic and phonetic roles are unclear.
With 耳 (ear) on the left and 亭 (pavilion) on the right, imagine an ear-shaped pavilion where sounds gather, but the meaning remains obscure.
For テイ, picture a tea (ティー) cup placed on the ear of the pavilion: tea -> テイ, though the kanji's meaning is uncertain.