PATENT CLAIM ANALYSIS

Application Number: 16035903
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["381", "318000"]

Abstract:
Provided is a hearing aid including a receiver, a microphone, an adaptive filter estimating a feedback transfer function from the receiver to the microphone, a subtractor, a hearing aid processor, a first whitening filter, a second whitening filter having a whitening filter coefficient identical to that of the first whitening filter, a coefficient updater, and a controller controlling the adaptive filter and the first and second whitening filters. The controller updates and saves, as a stabilization coefficient, the coefficient of the adaptive filter in a condition in which the autocorrelation of the first signal is low, determines the presence or absence of a change in the feedback transfer function based on the coefficient of the adaptive filter and the stabilization coefficient, and performs, when it is determined that the feedback transfer function has changed, the control in order that effectiveness of whitening by the first and second whitening filters is reduced as compared to that when it is determined that the feedback transfer function does not change.

Claim (Index 1):
A hearing aid comprising:\n a receiver configured to convert an electric signal into sound; a microphone configured to convert sound into an electric signal; an adaptive filter configured to adaptively estimate a feedback transfer function from the receiver to the microphone; a subtractor configured to subtract an output signal of the adaptive filter from an output signal of the microphone, thereby generating a first signal; a hearing aid processor configured to perform predetermined hearing aid processing for the first signal, thereby generating a second signal to be input to the receiver; a first whitening filter configured to whiten the first signal; a second whitening filter having a whitening filter coefficient identical to that of the first whitening filter and configured to whiten the second signal; a coefficient updater configured to update a coefficient of the adaptive filter based on each of output signals of the first and second whitening filters; and a controller configured to perform control of operation of the adaptive filter and the first and second whitening filters, wherein the controller\n updates and saves, as a stabilization coefficient, the coefficient of the adaptive filter in a condition in which an autocorrelation of the first signal is low, \n determines a presence or absence of a change in the feedback transfer function based on the coefficient of the adaptive filter and the stabilization coefficient, and \n performs, when it is determined that the feedback transfer function has changed, the control in order that effectiveness of whitening by the first and second whitening filters is reduced as compared to that when it is determined that the feedback transfer function does not change.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 95.0
- Lexical Diversity: 2.73134
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14791959', '14477126', '14315115', '13872590', '09409163']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7063458074609253
- 35 USC 102 Novelty (BERT): 0.4836054127742586
- Combined Prediction Score: 0.6840717679922587
- Mean Citation Score: 239.426784
- Max Citation Score: 248.49367
- Similarity Product: 216.2749557297921

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test