Audio signal generator
US4576178A · kind A · utility
Inventor
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0245
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system is disclosed that includes an audio signal generator to provide a distinguishable audible output that varies in accordance with a monitored input. The audio signal generator varies a parameter of the audible output, such as frequency or amplitude, in n discrete steps corresponding to a range of variation in value of the monitored input. A plurality of different inputs may be monitored, and an audio signal generated therefrom having a plurality of different parameters, each of which corresponds to an individual one of the monitored inputs. The monitored inputs may be heart rate, systolic blood pressure, diastolic blood pressure, and body temperature. The audio signal produced may be composed of a series of recurring pulses, the parameters of which corresponding to the different monitored inputs are amplitude of each pulse, time duration of each pulse, time duration between the onset of successive pulses, and the frequency of the signal that defines each pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.