静穏: tranquility / 清音: an unvoiced sound / 声音: tone of voice

音節: syllable

喉内音: dorsal consonant in Sanskrit phonology

容認発音: (linguistics) Received Pronunciation

雷音: the sound of thunder, a thunderclap

音素: phoneme

音調: intonation; accent; a tune; a tone; rhythm / 恩寵: grace; favour/favor

diaeresis

(phonology, orthography, grammar) all Japanese morae that can be spelled with 45 single modern kana and 2 historical kana (ゐ/ヰ and ゑ/ヱ) customarily without diacritical marks (゛ and ゜), excluding っ and ん, arranged in a 5x10 table (五十音図 (gojūonzu, literally “table of the fifty sounds”)), used for phonological and grammatical analysis

(orthography) the sort order for kana (historically, mainly for katakana) as arranged in the 五十音図 (literally “table of the fifty sounds”)