Hearing device and method for choosing a program in a multi program hearing device
The invention concerns a hearing device having an input transducer and an output transducer with a signal path therebetween, signal processing means connected in said signal path for influencing a signal in the signal path dependent on a PPS (processing parameter set), and a PPS memory accessible by the signal processor means for storing a number of different PPS's for use by the signal processing means. The system has means for monitoring the acoustic environment in a learning mode, where the user chooses the PPS to be used in the signal processing. Later in an automatic mode the hearing aid system chooses the PPS based on a comparison of the current acoustic environment with the monitored environment in the learning phase.
1. A hearing device comprising:
a programmable hearing aid having an input transducer and an output transducer with a signal path therebetween, signal processing means connected in said signal path for influencing a signal in the signal path dependent on a PPS or processing parameter set, and a PPS memory accessible by the signal processor means for storing a number of different PPS's for use by the signal processing means,
user input means for the user to choose a specific PPS to be used by the signal processing means in manual mode whenever the user experiences a specific acoustic environment,
means for capturing and storing in a second memory of CAV's or characterizing acoustic values derived from the signal during use of each of the user chosen PPS during a learning period in the manual mode whereby the means comprises a number of storing places arranged as a second cyclic buffer in the second memory for each of the CAV's for storing consecutively derived values, and storing places in the second memory for storing the most frequently occurring value of each CAV in the cyclic buffer,
means for capturing and temporarily storing in a first memory of current CAV in an automatic mode,
means for automatic selection of a PPS in an automatic mode, whereby the automatic selection is based on the comparison between current CAV's stored in the first memory and CAV's stored in the second memory.
2. Hearing aid system as claimed in claim 1 , whereby the acoustic values used to derive the CAV's comprises one or more of the following:
signal level in 3 or more bands,
modulation index in 3 or more bands,
speech presence flag,
wind noise flag,
directional flag.
3. Hearing device as claimed in claim 2 , whereby the hearing aid comprises a first cyclic buffer for storing consecutive acoustic values calculated directly from the input signal, and means for selecting and storing the most frequently occurring values in the cyclic buffer as the CAV values.
4. Hearing device as claimed in claim 3 , whereby the first cyclic buffer has a first length and update frequency in the manual mode and a second length and update frequency in the automatic mode.
5. Hearing device as claimed in claim 4 , whereby a comparison and a grading means is provided for comparing the current CAV's stored in the first memory in the automatic mode with the CAV's belonging to each PPS and stored in the second memory in the manual mode and whereby a grade is assigned to each PPS for the correspondence between the current CAV and the CAV belonging to the respective PPS whereby a further cyclic buffer is provided with places for each PPS and arranged to receive consecutive grades and where the PPS having the highest average grading over the cyclic buffer is used in the signal processing means.
6. Hearing device as claimed in claim 1 having second user input means for user determined selection of at least one parameter value belonging to a PPS during use by the signal processing means in the manual or the automatic mode.
7. Hearing device as claimed in claim 6 where means are provided for comparing the user determined parameter value with the value of the corresponding parameter belonging to the stored PPS and where means are provided for changing the value of the parameter belonging to the stored PPS in order to minimize the difference between the value of the stored parameter and the value of the user determined parameter.
8. Hearing device as claimed in claim 7 , wherein the user determined parameter value comprises the gain setting.
9. Method for choosing program in a multi program hearing device, whereby the hearing device has an input transducer and an output transducer with a signal path there between, providing signal processing means connected in said signal path for influencing a signal in the signal path dependent on a PPS or processing parameter set, and providing a PPS memory accessible by the signal processor means and storing a number of different PPS's for use by the signal processing means,
providing user input means for the user to choose a specific PPS to be used by the signal processing means whenever the user experiences an acoustic environment,
capturing and storing in a second memory of CAV's or characterizing acoustic values derived from the signal during use of each of the user chosen PPS during the learning period in the manual mode are stored in second cyclic buffer in the second memory and where the most frequently occurring value for each of the CAV's is stored in the second memory,
capturing and temporarily storing in a first memory of current, CAV's-automatic selection of a PPS, whereby the automatic selection is based on the comparison between current CAV stored in the first memory and CAV's stored in the second memory.
10. Method for choosing a program as claimed in claim 9 , whereby the CAVS comprises one or more of the following:
signal level in 3 or more bands,
modulation index in 3 or more hands,
speech presence flag,
wind noise flag,
directional flag.
11. Method for choosing a program as claimed in claim 9 , whereby the CAV values to be stored in the second cyclic buffer are derived by first storing consecutive acoustic values calculated directly from the input signal of the hearing aid in a first cyclic buffer and storing the most frequently occurring value, such that the most frequently occurring values are used in the CAV values.
12. Method as claimed in claim 11 , whereby the first cyclic buffer has a first length and update frequency in manual mode and a second length and update frequency in the automatic mode.
13. Method as claimed in claim 9 , whereby the current CAV values which are stored in the first memory in the automatic mode are compared with the CAV values belonging to each PPS and stored in the second memory in the manual mode, and whereby a grade is assigned to each PPS for the correspondence between the current CAV and the CAV belonging to the respective PPS, whereby a further cyclic buffer is provided with places for each PPS and arranged to receive consecutive grades, and where the PPS having the highest average grading over the cyclic buffer is used in the signal processing means.
14. Method as claimed in claim 9 , and whereby second user input means are provided for user-determined selection of at least one parameter value belonging to a PPS during use by the signal processing means in the manual or the automatic mode.
15. Method as claimed in claim 14 , where the user-determined parameter value is compared with the value of the corresponding parameter belonging to the stored PPS and where the value of the parameter belonging to the stored PPS is changed in order to minimize the difference between the value of the stored parameter and the value of the user-determined parameter.
16. Method as claimed in claim 14 , wherein the at least one user-determined parameter value comprises gain setting.