Not a continuous source of sound. A vehicle alarm siren is usually is intermittent
typically defined as an uninterrupted sound such as low constant humming sound of the air conditioner or refrigerator
cacophony
104dB
The lines in a spectroscope tell what element(s) are being observed. The continuous color are background noise or put there for a reference.
is making - present continuous verb phrase
is making - present continuous verb phrase
have you checked your car for aliens?
A key on the key board is stuck in the down position
It is warning you that your seat belt isn't fastened.
top 6: engine, muffler, horn, exhaust, flat tire, and springs Continuous mechanical noise sources: Engine and rotating parts, drive belts, transmission, wheel and axle bearings, tires, exhaust systems. Continuous external noise sources: road surfaces, wind noise. Sporadic noise sources: Engine misfire or pre-ignition, power steering rack and other steering parts, drive belt noise, brakes, exhaust system, shock absorbers, suspension, loose interior parts (dash board, window regulators), heater/AC fan, wheel bearings (sometimes noticeable only when turning).
idle air control valve
To rebuke; to reprove; to scold; to find fault with., Fig.: To be noisy about; to chafe against., To utter words of disapprobation and displeasure; to find fault; to contend angrily., To make a clamorous noise; to chafe., A continuous noise or murmur.
Sound of any kind., Especially, loud, confused, or senseless sound; clamor; din., Loud or continuous talk; general talk or discussion; rumor; report., Music, in general; a concert; also, a company of musicians; a band., To sound; to make a noise., To spread by rumor or report., To disturb with noise.