HD meaning in Military and Defence ?

Answer:

What is Harmonic Distortion mean?

Distortion is the alteration of the original shape (or other characteristic) of something. In communications and electronics it means the alteration of the waveform of an information-bearing signal, such as an audio signal representing sound or a video signal representing images, in an electronic device or communication channel.

Distortion is usually unwanted, and so engineers strive to eliminate or minimize it. In some situations, however, distortion may be desirable. For example, in noise reduction systems like the Dolby system, an audio signal is deliberately distorted in ways that emphasize aspects of the signal that are subject to electrical noise, then it is symmetrically "undistorted" after passing through a noisy communication channel, reducing the noise in the received signal. Distortion is also used as a musical effect, particularly with electric guitars.

The addition of noise or other outside signals (hum, interference) is not considered distortion, though the effects of quantization distortion are sometimes included in noise. Quality measures that reflect both noise and distortion include the signal-to-noise and distortion (SINAD) ratio and total harmonic distortion plus noise (THD+N).

reference

Full Form	Category
Hypersexual Disorder	Academic & Science
Higher Dominion	Academic & Science
High Dollar	Accounts and Finance
Haagen Dazs	Business
Highly Desired	Business
Harley Davidson	Business
Home Depot, Inc.	Business
Home Depot	Business
High Durability	Business
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High Demand	Business
Henry Duncan	Community
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Hammered Dulcimer	Community
High Definition	Computer Hardware
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Heidelberg, Germany	Governmental
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Health Department	Governmental
Head, Headland	Governmental
House District	Governmental
Hardly Dangerous	Governmental
Harmonized Document	Governmental
Hammer Down	Governmental
Hewlett Packard	Governmental
Hull Defilade	Governmental
HARDA	Indian Railway Station
High Density	Information Technology
Halte Durch	International
Head of Department	Jobs
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Hall Director	Jobs
Hurter Driffield	Maths
Hausdorff Dimension	Maths
Highest Divisor	Maths
Hahnemannian Decimal	Maths
Hexagonal Diamond	Maths
Hundreds of Dollars	Measurement Unit
Hundred Dollars	Measurement Unit
Huntington's Disease	Medical
Healthy Diet	Medical
human a-defensin	Medical
distilled mustard	Medical
Horse Dander	Medical
human α-defensin	Medical
Hip Disarticulation	Medical
Hirschsprung disease	Medical
Hip Dysplasia	Medical
High Dose	Medical
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Heart disease	Medical
Hemodialysis	Medical
Hyperactive Disorder	Medical
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Hodgkin's Disease (lymphoma)	Medical
Horse Dung	Messaging
Hopelessly Deaf	Messaging
Heavyduty	Messaging
Horrible and Detrimental	Messaging
A Mustard Agent	Military and Defence
Harmonic Distortion	Military and Defence
Homeland Defense	Military and Defence
Home Defense	Military and Defence
Mustard Gas, Distilled (military Designation)	Military and Defence
Half Duplex	Networking
Heavy Density	Physics Related
Harmonised Document	Softwares
High Drag	Space Science
Highly Desirable	Space Science
Holddown	Space Science
Horizontal Drain	Space Science
Hydrogen Drain	Space Science