In physics-based sound synthesis, it is generally possible to incorporate a mechanical or acoustical immittance (admittance or impedance) in the form of a digital filter. Examples include modeling of the termination of a string or a tube. However, when digital filters are fitted to measured immittance data, care has to be taken that the resulting filter corresponds to a passive mechanical or ac...

Progeria is a rare syndrome, with an estimated incidence of 1 per 250,000 births. Although children with progeria have the appearance of premature aging or senility, the term is misleading because reported cases of progeria have not manifested most physical or biochemical aspects of old age. Many children with progeria appear normal at birth and then progressively, and rather rapidly, develop t...

In an experimental study, we evaluated acoustic immittance in rabbits in order to use these data as normative values for further experimental investigations. This study is the first experimental evaluation of both conventional 226 Hz and multifrequency tympanometry (MFT) in rabbits. For the investigation, we used 33 female New Zealand rabbits weighing 3.2-4.4 kg and aged six months. Bilateral m...

Historically, the ipsilateral acoustic reflex (IAR) has played a prominent role in middle ear screening protocols. However, in 1990, the American Speech-Language-Hearing Association's revised guidelines, "Screening for Hearing Impairment and Middle Ear Disorders," deleted the IAR as a screening parameter. This decision was based on studies that demonstrated that the inclusion of the IAR resulte...

OBJECTIVE To investigate whether there is any relationship between otological as well as vestibular symptoms, audiological findings and type of temporomandibular disorder (articular, muscular and mixed); and to check the distribution of the temporomandibular disorders (TMD) dysfunction degree in the research population. METHODS A retrospective study involving 30 patients of both sexes, aged b...

OBJECTIVE To compare the efficacy and feasibility of teleaudiometry with that of sweep audiometry in elementary school children, using pure-tone audiometry as the gold standard. METHODS A total of 243 students with a mean age of 8.3 years participated in the study. Of these, 118 were boys, and 125 were girls. The following procedures were performed: teleaudiometry screening with software that...

Purpose: To evaluate the hearing capacity of children with HIV/AIDS and its association to patient age and time of diagnosis. Methods: This descriptive cross-sectional study included 23 children with HIV/AIDS monitored in two specialized medical centers in Joao Pessoa, Brazil. The children underwent basic audiometric evaluation (audiometry and immittance measurements), and the findings were ana...