If You're a Freshman: You've most likely only completed one semester of high school so far, so there's plenty of time (five semesters!) left for you to raise your GPA. The majority of your classes are still ahead of you. If you make wise changes to your study habits now, you shouldn't have a problem improving them.
Air horn. An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, and the horn amplifies the sound so it is louder. Air horns are widely employed as vehicle horns, installed on large semi-trailer trucks, fire trucks, trains, and some ambulances as a warning device, a
1. a sudden and violent gust of wind. 2. the blowing of a trumpet, whistle, etc. 3. a loud, sudden sound or noise: a harsh blast from the radio. 4. a forcible stream of air from the mouth, bellows, or the like. 5. a. air forced into a furnace by a blower to increase the rate of combustion. b. a jet of steam directed up a smokestack, as of a steam locomotive, to increase draft. 6. a forceful throw, hit, etc.: a blast down to third base.