31. To reduce the noise risks NASA engineers are building hardware with inbuilt noise reduction . 32. Playback without noise reduction produces a noticeably brighter sound, however. 33. Electronic stethoscopes can be recording devices, and can provide noise reduction and signal enhancement. 34. Dolby proposed replacing the Academy curve with Dolby A type noise reduction on the track. 35. However, with advances in noise reduction technologies the airframe is typically more noisy during landing. 36. Although noise is discarded this has nothing to do with ( visible ) noise reduction . 37. Similar techniques are used in audio noise reduction circuits such as those developed for Dolby. 38. The technology can also be applied in other areas such as noise reduction and security. 39. Ironically, not all verifier operators appreciated the noise reduction . 40. BVU 800 series also added Dolby audio noise reduction .
