subsonic

"The old fisherman told stories of a leviathan lurking in the deep, a creature so immense and powerful that it could swallow a boat whole. "

"The maximum number of students allowed in the class is twenty-five. "

"...approximately 60 beats per minute."

"Dogs can hear this whistle, but for people it is inaudible."

"My grandmother bought a new comfortable for her bed. "

"The frequency of bus service has been improved from one every 15 to one every 12 minutes."

"The scientific method is important in my school science class. "

"My dad took the airplane to visit his sister in another city. "

"The temperature in the room dropped nearly 20 degrees; it went from hot to cold."

"Apply pressure to the wound to stop the bleeding."

"The aircraft flew over the school playground during the morning assembly. "

"a literary history"