Kilohertz (kHz), a unit of frequency equal to 1,000 hertz, is a central part of our digital world. It’s prominently used to measure frequencies of audio signals, radio transmissions, and clock speeds in computers. The human ear can typically hear sounds ranging from 20 Hz to 20 kHz. Interestingly, ultrasonic devices like bat echolocation operate at frequencies well beyond this range, often between 20 kHz and 200 kHz, allowing them sophistication in navigation and hunting that humans cannot directly experience.
In radio broadcasting, AM radio stations operate at kilohertz frequencies, generally between 530 kHz to 1700 kHz, catering to long-distance communication. This contrasts with FM radio, which uses the higher megahertz range. Understanding kilohertz can give insight into how different signals traverse space, influencing everything from global communications to wildlife studies.
Terahertz, symbolized as THz, is a unit of frequency equivalent to one trillion cycles per second, or 1,000,000,000,000 Hz. In the electromagnetic spectrum, terahertz waves occupy the fascinating territory between microwaves and infrared light. This region, often referred to as the “terahertz gap,” has long captivated scientists because of its potential in numerous applications, including advanced imaging techniques, security screening, and even the detection of defects in materials.
Remarkably, terahertz radiation is non-ionizing, meaning it is much safer for biological tissues compared to X-rays. This capability opens doors to potentially revolutionary medical imaging and diagnostics opportunities without the risk of harmful radiation exposure. As researchers continue to explore this “hidden power,” the future holds exciting prospects for terahertz technology across a multitude of fields.
| Kilohertz | Terahertz |
|---|---|
0
kHz
|
0
THz
|
1
kHz
|
1e-9
THz
|
2
kHz
|
2e-9
THz
|
3
kHz
|
3e-9
THz
|
4
kHz
|
4e-9
THz
|
5
kHz
|
5e-9
THz
|
6
kHz
|
6e-9
THz
|
7
kHz
|
7e-9
THz
|
8
kHz
|
8e-9
THz
|
9
kHz
|
9e-9
THz
|
10
kHz
|
1e-8
THz
|
11
kHz
|
1.1e-8
THz
|
12
kHz
|
1.2e-8
THz
|
13
kHz
|
1.3e-8
THz
|
14
kHz
|
1.4e-8
THz
|
15
kHz
|
1.5e-8
THz
|
16
kHz
|
1.6e-8
THz
|
17
kHz
|
1.7e-8
THz
|
18
kHz
|
1.8e-8
THz
|
19
kHz
|
1.9e-8
THz
|
20
kHz
|
2e-8
THz
|
21
kHz
|
2.1e-8
THz
|
22
kHz
|
2.2e-8
THz
|
23
kHz
|
2.3e-8
THz
|
24
kHz
|
2.4e-8
THz
|
25
kHz
|
2.5e-8
THz
|
26
kHz
|
2.6e-8
THz
|
27
kHz
|
2.7e-8
THz
|
28
kHz
|
2.8e-8
THz
|
29
kHz
|
2.9e-8
THz
|
30
kHz
|
3e-8
THz
|
31
kHz
|
3.1e-8
THz
|
32
kHz
|
3.2e-8
THz
|
33
kHz
|
3.3e-8
THz
|
34
kHz
|
3.4e-8
THz
|
35
kHz
|
3.5e-8
THz
|
36
kHz
|
3.6e-8
THz
|
37
kHz
|
3.7e-8
THz
|
38
kHz
|
3.8e-8
THz
|
39
kHz
|
3.9e-8
THz
|
40
kHz
|
4e-8
THz
|
41
kHz
|
4.1e-8
THz
|
42
kHz
|
4.2e-8
THz
|
43
kHz
|
4.3e-8
THz
|
44
kHz
|
4.4e-8
THz
|
45
kHz
|
4.5e-8
THz
|
46
kHz
|
4.6e-8
THz
|
47
kHz
|
4.7e-8
THz
|
48
kHz
|
4.8e-8
THz
|
49
kHz
|
4.9e-8
THz
|
50
kHz
|
5e-8
THz
|
51
kHz
|
5.1e-8
THz
|
52
kHz
|
5.2e-8
THz
|
53
kHz
|
5.3e-8
THz
|
54
kHz
|
5.4e-8
THz
|
55
kHz
|
5.5e-8
THz
|
56
kHz
|
5.6e-8
THz
|
57
kHz
|
5.7e-8
THz
|
58
kHz
|
5.8e-8
THz
|
59
kHz
|
5.9e-8
THz
|
60
kHz
|
6e-8
THz
|
61
kHz
|
6.1e-8
THz
|
62
kHz
|
6.2e-8
THz
|
63
kHz
|
6.3e-8
THz
|
64
kHz
|
6.4e-8
THz
|
65
kHz
|
6.5e-8
THz
|
66
kHz
|
6.6e-8
THz
|
67
kHz
|
6.7e-8
THz
|
68
kHz
|
6.8e-8
THz
|
69
kHz
|
6.9e-8
THz
|
70
kHz
|
7e-8
THz
|
71
kHz
|
7.1e-8
THz
|
72
kHz
|
7.2e-8
THz
|
73
kHz
|
7.3e-8
THz
|
74
kHz
|
7.4e-8
THz
|
75
kHz
|
7.5e-8
THz
|
76
kHz
|
7.6e-8
THz
|
77
kHz
|
7.7e-8
THz
|
78
kHz
|
7.8e-8
THz
|
79
kHz
|
7.9e-8
THz
|
80
kHz
|
8e-8
THz
|
81
kHz
|
8.1e-8
THz
|
82
kHz
|
8.2e-8
THz
|
83
kHz
|
8.3e-8
THz
|
84
kHz
|
8.4e-8
THz
|
85
kHz
|
8.5e-8
THz
|
86
kHz
|
8.6e-8
THz
|
87
kHz
|
8.7e-8
THz
|
88
kHz
|
8.8e-8
THz
|
89
kHz
|
8.9e-8
THz
|
90
kHz
|
9e-8
THz
|
91
kHz
|
9.1e-8
THz
|
92
kHz
|
9.2e-8
THz
|
93
kHz
|
9.3e-8
THz
|
94
kHz
|
9.4e-8
THz
|
95
kHz
|
9.5e-8
THz
|
96
kHz
|
9.6e-8
THz
|
97
kHz
|
9.7e-8
THz
|
98
kHz
|
9.8e-8
THz
|
99
kHz
|
9.9e-8
THz
|
100
kHz
|
1e-7
THz
|
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