Meanings

ultrasonic microscope

phonetic symbol

ringtone

ultrasonic generator

sound shift (esp. in historical kana)

heart murmur

to speak one's mind

sound leaking (out of headphones, etc.)

audio lag

recording audio at home (as opposed to in a studio)

thermal noise

daily life noise

low noise (of a machine, appliance, etc.)

very loud volume

daily life noise

recording room

fortis

lenis

audio dropout (incl. stutter, clicks, pops etc.)

loud sound