In this study, different objective quality measures for the performance prediction of noise reduction schemes are compared to subjective data from psychoacoustic listening tests. It is shown that the considered perceptual measures are appropriate to define a quality test-bench which can be used for the development and optimization of noise reduction schemes.

This paper describes the operation of the AC-3 multichannel adaptive transform coder. Coding a multiplicity of channels as a single entity is more efficient that coding individual channels, permitting a lower net data rate. The major processing blocks of the AC-3 coder are presented and discussed, along with the underlying psychoacoustic principles. Strengths and limitations of the coding techn...

the review presents a digital audio watermarking technique operating in the frequency domain with two variants. This technique uses the Modified Discrete Cosine Transform (MDCT) to move to the frequency domain. To ensure more inaudibility, we exploited the proprieties of the psychoacoustic model 1 (PMH1) of MPEG1 encoder layer I in the first variant and those of psychoacoustic model 2 (PMH2) of...

The characteristics of moving sound sources have strong implications on the listener’s distance perception and the estimation of velocity. Modifications of the typical sound emissions as they are currently occurring due to the tendency towards electromobility have an impact on the pedestrian’s safety in road traffic. Thus, investigations of the relevant cues for velocity and distance perception...

Objective consonant evaluation using palatograph tracing and digital acoustic assessment methods are valuable tools for speech that can be used to track improvement in patients wearing a removable prosthesis. In this case report, we employed the psychoacoustic parameter – sharpness - compare quality of consonants cleft palate patient while old prosthesis, new prosthesis following palatogram gui...

Cook & Fujisawa (2006) point out that, contrary to the predictions of psychoacoustic models, the diminished triad is more consonant and prevalent in western tonal music than the augmented. A possible simple explanation is that the diminished triad often functions as an incomplete dominant (major-minor) seventh chord, the most prevalent tetrad in mainstream tonal music. Submitted 2006 July 12; a...

The most dominant source in audio is usually perceived as melody. The estimation of it’s fundamental frequency can be treated as melody estimation. The task become difficult when the polyphony of the audio is high. To determine the most dominant source in human perception, perceptual properties have to be accounted. In this algorithm, we applied psychoacoustic property to the data to estimate t...

This letter proposes a novel nonlinear distortion for the unique identification of receiving room impulses in stereo acoustic echo cancellation when applying the frequency-domain adaptive filtering technique. This nonlinear distortion is effective in reducing the coherence between the two incoming audio channels and its influence on audio quality is inaudible. key words: acoustic echo cancellat...

In order to improve audio coding performance, excess masking has been employed for the compression of complex audio signals. A new algorithm is developed to classify and pre-process maskers. A psychoacoustic model is used to estimate simultaneous masking threshold. This masking threshold is used for quantizing audio signal coefficients in the frequency domain. Preliminary test results show impr...

Unmanned aerial vehicle (UAV) technologies are rapidly advancing due to the unlimited number of applications from parcel delivery people transportation. As UAV market expands, community noise impact will become a significant problem for public acceptance. Compact drone architectures based on contra-rotating propellers bring benefits in terms aerodynamic performance and redundancy ensure control...