Talebob ("Speech Bob") is an interactive language learning tool for pupils (10+ years) helping them practice their pronunciation of simple, highly frequent phrases in Danish. Talebob's feedback is based on acoustic measurements (for pitch and intensity), presented to the user as helpful instructions for improvement. Talebob is currently being tested in schools in Nuuk, Hafnarfjörður and Tórshav...

The cost function of constant modulus algorithm (CMA) is simplified to meet second norm form, and the blind equalizer can use recurrent least squares (RLS) algorithm to update the weights. Considering the underwater acoustic channel is usually nonlinear, decision feedback equalizer is used as the blind equalizer. According to the simplified cost function of CMA, the weights of forward part and ...

Acoustic feedback controllers (AFCs) are typically applied to solve feedback problems evident in applications such as public address (PA) systems, hearing aids, and speech applications. Applying the techniques of AFCs to different contexts, such as musical performance, sound installations, and product design, presents a unique insight into the research of embodied sonic interfaces and environme...

Schaffert N, Mattes K, Effenberg AO. An investigation of online acoustic information for elite rowers in onwater training conditions. J. Hum. Sport Exerc. Vol. 6, No. 2, pp. 392-405, 2011. Presenting acoustic information has become increasingly interesting for technique training and control in various sports. In elite rowing, acoustic feedback is a new and promising application to optimize the ...

Traditionally, the average professional musician has owned numerous acoustic musical instruments, many of them having distinctive acoustic qualities. However, a modern musician could prefer to have a single musical instrument whose acoustics are programmable by feedback control, where acoustic variables are estimated from sensor measurements in real time and then fed back in order to influence ...

An evaluation was made of the efficacy of a digital feedback equalization algorithm employed by the Central Institute for the Deaf Wearable Adaptive Digital Hearing Aid. Three questions were addressed: 1) Does acoustic feedback limit gain adjustments made by hearing aid users? 2) Does feedback equalization permit users with hearing-impairment to select more gain without feedback? and, 3) If mor...

A generalized approach to decompose the compressible Navier-Stokes equations into an equivalent set of coupled for flow and acoustics is introduced. As a significant extension standard hydrodynamic/acoustic splitting methods, provides essential coupling terms, which account feedback from flow. unique simplified version split equation system with derived that conforms in subsonic regime, where r...

We present a novel control method achieving stable multiple-degrees-of-freedom electroacoustic resonators. Such broadband absorbers, composed of a feedback-controlled electrodynamic loudspeaker, have many practical applications to real-world acoustic engineering problems, such as low-frequency industrial noise reduction in the range of [20 200 Hz]. The proposed control architecture combines a c...

Sound can be described as the propagation of pressure variations in compressible media that involves compression and expansion and induces a change in the density of the medium. This change in acoustic pressure as it induces a change of the refractive index can be measured by optical methods, the most recent being the optical feedback interferometry. With this technique, a laser diode is beamin...