https://www.youtube.com/watch?v=p-OKm8ELGMg
Mixing closer to 81 dB may be 82..83
mixing 90 dB is hurt
monitoring 50 - 70 db
- make lower and higher frequencies quieter
when mixing use two level
- quiet (50-70) → long period mixing
- loud (80-90) → for checking
| Source | Sound Pressure Level (dBA) |
|---|---|
| Threshold of Hearing | 0 |
| Rustling leaves | 20 |
| Quiet whisper (1 m) | 30 |
| Quiet office | 40 |
| Normal conversation at 1 m | 60 |
| Inside a car | 65-80 |
| Loud singing | 70 |
| Vacuum cleaner (3 m) | 75 |
| Buses, diesel trucks, motorcycles (15 m) | 80 |
| Jackhammer (15 m) | 90 |
| Concert | 100 |
| Deafening, human pain limit | 120 |
| Jet plane (30 m) | 130 |
| Threshold of pain | 140 |
| Military Jet Take-off (30 m) | 150 |
| Large military weapons | 180 |
Music: how loud is loud? (youtube.com) dBA → dB A-weighted
THX Reference
SPL need to be more than 85 dB (+20 dB head room)
Speaker need to be able to produce 105 dB Subwoofer need to be able to play 115 dB