Well if I'm not crazy I have a slight feeling it Shelden make that sound (That would be sarcasm) It should not make that sound because your not supposed to know it is there. I would Suddgest it is a anlog clock.
Video surveillance is basically the monitoring of an area with some form of video recording device. This would be primarily in locations where security is very important or heavily trafficked public locations.
If it's inside your apartment and not out side (which laws would vary in that case) then yes. You can record sound and have video. Hidden or proclaimed.
covert is in secret, so overt would be out in the open... For example in Surveillance: Covert surveillance is any hidden equipment or personnel used to watch, observe, or otherwise record people, objects, data, events, or facts. This is in an effort to compile the raw material used to produce intelligence. Overt surveillance is when the subject has been informed of the nature and scope of the surveillance being conducted and/or the surveillance devices are clearly labeled and displayed. Obvious
That really depends on what one would want or would need in a surveillance DVR system. Surveillance DVR's can be as cheap as $99 or as expensive as $1299.
No, you would not hear the clock ticking because sound requires a medium, such as air, to travel through. Without air in the box, there would be no medium for the sound waves generated by the clock's ticking to travel through, so the sound would not reach your ears.
The phrase "a ticking clock in the puppy's bed" is a modified subject, a sentence fragment. The phrase "Is a ticking clock in the puppy's bed?" would be an interrogative sentence.
well it sounds like your lifters are ticking The connecting rods screaming LET ME OUT!!!
This would mostly be used for surveillance of an individual. Civilians sometimes use these to keep track of family members. The government may use these to track a suspicious individual.
The natural camouflage of the Cuttlefish regularly foils surveillance by its would-be predators. The Watergate plumbers pretended to be telephone repairmen so that they could install surveillance equipment. My cloak of invisibility prevents surveillance.
Queen Elizabeth would have consulted widely to deal with the common day surveillance issues.
The ticking noise is the metal cooling.
A ticking or clicking sound is probably lifter noise, the valves need adjusting