[计] anisotropic sound bearing medium
gè xiàng yì xìng chuán shēng jiè zhì ㄍㄜˋ ㄒㄧㄤˋ ㄧˋ ㄒㄧㄥˋ ㄔㄨㄢˊ ㄕㄥ ㄐㄧㄝˋ ㄓˋ