Hearing aids: an overview of the state-of-the-art, challenges, and future trends of an interesting audio signal processing application

2009 ◽  
Author(s):  
H. Puder
Keyword(s):  
Signal Processing ◽  
Hearing Aids ◽  
State Of The Art ◽  
Audio Signal ◽  
The State ◽  
Future Trends ◽  
Audio Signal Processing ◽  
Processing Application ◽  
Signal Processing Application

scholarly journals Signal Processing in High-End Hearing Aids: State of the Art, Challenges, and Future Trends

2005 ◽  
Vol 2005 (18) ◽  
Author(s):  
V. Hamacher ◽  
J. Chalupper ◽  
J. Eggers ◽  
E. Fischer ◽  
U. Kornagel ◽  
...  
Keyword(s):  
Signal Processing ◽  
Hearing Aids ◽  
State Of The Art ◽  
Future Trends

ANALYZING THE REAL-TIME PROPERTIES OF A U.S. NAVY SIGNAL PROCESSING SYSTEM

2001 ◽  
Vol 08 (04) ◽  
pp. 301-322 ◽  
Author(s):  
STEVE GODDARD ◽  
KEVIN JEFFAY
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
State Of The Art ◽  
Low Frequency ◽  
Processing System ◽  
The State ◽  
Signal Processing System ◽  
Processing Application ◽  
The Real ◽  
On Line

The state of the art in verifying the real-time requirements of applications developed using general processing graph models relies on simulation or off-line scheduling. We extend the state of the art by presenting analytical methods that support the analysis of cyclic processing graphs executed with on-line schedulers. We show that it is possible to compute the latency inherent in a processing graph independent of the hardware hosting the application. We also show how to compute the real-time execution rate of each node in the graph. Using the execution rate of each node and the time it takes per execution on a given processor, the resulting CPU utilization can be computed, as shown here for the Directed Low Frequency Analysis and Recording (DIFAR) acoustic signal processing application from the Airborne Low Frequency Sonar (ALFS) system of the SH-60B LAMPS MK III anti-submarine helicopter.

scholarly journals Detection and Correction of Under-/Overexposed Optical Soundtracks by Coupling Image and Audio Signal Processing

2008 ◽  
Vol 2008 (1) ◽  
Author(s):  
Jonathan Taquet ◽  
Bernard Besserer ◽  
Abdelali Hassaine ◽  
Etienne Decenciere
Keyword(s):  
Signal Processing ◽  
Audio Signal ◽  
Audio Signal Processing

scholarly journals Integrating Audio Signal Processing and Deep Learning Algorithms for Gait Pattern Classification in Brazilian Gaited Horses

2021 ◽  
Vol 2 ◽  
Author(s):  
Anderson Antonio Carvalho Alves ◽  
Lucas Tassoni Andrietta ◽  
Rafael Zinni Lopes ◽  
Fernando Oliveira Bussiman ◽  
Fabyano Fonseca e Silva ◽  
...  
Keyword(s):  
Neural Networks ◽  
Signal Processing ◽  
Deep Learning ◽  
Audio Signal ◽  
Gait Pattern ◽  
Classification Performance ◽  
Audio Signal Processing ◽  
Gait Patterns ◽  
Audio Features ◽  
Gaited Horses

This study focused on assessing the usefulness of using audio signal processing in the gaited horse industry. A total of 196 short-time audio files (4 s) were collected from video recordings of Brazilian gaited horses. These files were converted into waveform signals (196 samples by 80,000 columns) and divided into training (N = 164) and validation (N = 32) datasets. Twelve single-valued audio features were initially extracted to summarize the training data according to the gait patterns (Marcha Batida—MB and Marcha Picada—MP). After preliminary analyses, high-dimensional arrays of the Mel Frequency Cepstral Coefficients (MFCC), Onset Strength (OS), and Tempogram (TEMP) were extracted and used as input information in the classification algorithms. A principal component analysis (PCA) was performed using the 12 single-valued features set and each audio-feature dataset—AFD (MFCC, OS, and TEMP) for prior data visualization. Machine learning (random forest, RF; support vector machine, SVM) and deep learning (multilayer perceptron neural networks, MLP; convolution neural networks, CNN) algorithms were used to classify the gait types. A five-fold cross-validation scheme with 10 repetitions was employed for assessing the models' predictive performance. The classification performance across models and AFD was also validated with independent observations. The models and AFD were compared based on the classification accuracy (ACC), specificity (SPEC), sensitivity (SEN), and area under the curve (AUC). In the logistic regression analysis, five out of the 12 audio features extracted were significant (p < 0.05) between the gait types. ACC averages ranged from 0.806 to 0.932 for MFCC, from 0.758 to 0.948 for OS and, from 0.936 to 0.968 for TEMP. Overall, the TEMP dataset provided the best classification accuracies for all models. The most suitable method for audio-based horse gait pattern classification was CNN. Both cross and independent validation schemes confirmed that high values of ACC, SPEC, SEN, and AUC are expected for yet-to-be-observed labels, except for MFCC-based models, in which clear overfitting was observed. Using audio-generated data for describing gait phenotypes in Brazilian horses is a promising approach, as the two gait patterns were correctly distinguished. The highest classification performance was achieved by combining CNN and the rhythmic-descriptive AFD.

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