|
|
|||||||||
| Software: RF Cascade Workbook | RF Symbols for Office | RF Symbols & Stencils for Visio | Espresso Workbook | ||||||||||
|
|||||||||||||||||||||||||||||||
   |
   |
||||||||||||||||||||||||||||||
|
Please Support RF Cafe by purchasing my ridiculously low-priced products, all of which I created. RF & Electronics Symbols for Visio RF & Electronics Symbols for Office RF & Electronics Stencils for Visio T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads These Are Available for Free |
|||||||||||||||||||||||||||||||
Sound Power Levels
Sound powers for the
following equation in dBA units are referenced to a picowatt (10-12 W).
Where: W1, W2 = sound power in similar units of watts
The threshold of pain for the human ear is usually taken to be around 120 dBA.
The following table presents examples of some common noise sources.
| Situation and sound source |
sound power Pac watts |
sound power level Lw dB re 10-12 W |
| Rocket engine | 1,000,000 W | 180 dB |
| Turbojet engine | 10,000 W | 160 dB |
| Siren | 1,000 W | 150 dB |
| Heavy truck engine or loudspeaker rock concert |
100 W | 140 dB |
| Machine gun | 10 W | 130 dB |
| Jackhammer | 1 W | 120 dB |
| Excavator, trumpet | 0.3 W | 115 dB |
| Chain saw | 0.1 W | 110 dB |
| Helicopter | 0.01 W | 100 dB |
| Loud speech, vivid children | 0.001 W | 90 dB |
| Usual talking, Typewriter | 10-5 W | 70 dB |
| Refrigerator | 10-7 W | 50 dB |
| (Auditory threshold at 2.8 m) | 10-10 W | 20 dB |
| (Auditory threshold at 28 cm) | 10-12 W | 0 dB |
Copyright: 1996 - 2026 |
About RF Cafe RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived... |
Copyright 1996 - 2026 All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledge My Hobby Website: My Daughter's Website: |
