Improvements to speech quality from a diving helmet
Abstract
The normal quality of speech received from a microphone in a diving helmet is far from acceptable for broadcasting. It is both severely distorted in terms of spectral content and, where air is supplied to the diver via a 'demand valve', the noise level from the demand valve is extremely high. These problems are examined and ways in which they can be overcome without losing the verisimilitude of the event are suggested.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1981
- Bibcode:
- 1981STIN...8219399M
- Keywords:
-
- Diving (Underwater);
- Helmets;
- Noise Reduction;
- Talking;
- Broadcasting;
- Distortion;
- Microphones;
- Noise Spectra;
- Signal To Noise Ratios;
- Communications and Radar