Are distortion levels a problem with digital signal processing hearing aids and frequency modulation (FM) systems?

The purpose of this study was to examine objective and subjective distortion present when frequency modulation (FM) systems were coupled with four digital signal processing (DSP) hearing aids. Electroacoustic analysis and subjective listening tests by experienced audiologists revealed that distortion levels varied across hearing aids and channels.

Recommendations for a mathematical curriculum to be used in conjunction with an oral deaf education program

Students who are deaf or hard of hearing have typically had difficulty in mathematics; however, this problem often is overlooked because of difficulties in language and reading abilities. This study aims to identify the most appropriate mathematics curriculum for deaf or hard of hearing students in an oral deaf education program.

Między językiem a światem. O poezji Krystyny Miłobędzkiej

Wydział Filologii Polskiej i Klasycznej: Instytut Filologii Polskiej

Quince minutos de fama financiera: la historia de Marc A. Hélie el "hombre que le quebró al Ecuador" (Jurisprudencia)

La problemática de la deuda externa ecuatoriana puede mirarse a través de varias formas y puntos de vista, notablemente, en virtud de técnicas jurídicas, financieras, sociales, etc. El problema con estos puntos de vista es que al ser orientados a grupos específicos, terminan siendo de difícil digestión para el común de las personas. Este artículo pretende revisar un importante episodio financiero desde una perspectiva histórica, más cálida y alejada de tecnicismos, es una historia de ambición que narra un pequeño capítulo en la vida de un hombre: Marc Hélie quien, a nombre de la transparencia e integridad de los mercados internacionales, por poco destruye a un país solo para terminar relegado de los mercados a los que decía defender.

An integral equation method for a boundary value problem arising in unsteady water wave problems

In this paper we consider the 2D Dirichlet boundary value problem for Laplace’s equation in a non-locally perturbed half-plane, with data in the space of bounded and continuous functions. We show uniqueness of solution, using standard Phragmen-Lindelof arguments. The main result is to propose a boundary integral equation formulation, to prove equivalence with the boundary value problem, and to show that the integral equation is well posed by applying a recent partial generalisation of the Fredholm alternative in Arens et al [J. Int. Equ. Appl. 15 (2003) pp. 1-35]. This then leads to an existence proof for the boundary value problem. Keywords. Boundary integral equation method, Water waves, Laplace’s