INTRODUCTION Tympanometry is currently the most frequently used tool for assessing the status of the middle ear, commonly assessed using a single 226Hz tone. However, the use of the Acoustic Immittance Measures with a wideband stimulus is a promising high-resolution evaluation, especially in individuals known to have middle ear alterations, such as Down syndrome patients. OBJECTIVE The aim of...

Newborns of a gestational age of 24-32 weeks are commonly very weak and have health problems. The facilities of a Neonatal Intensive Care Unit (NICU) provide the medical equipment needed for their care and in some cases, for their survival. The acoustic environment of a typical NICU is very rich and may contain a large number of different sounds, which come either from the equipment or from the...

background: the primary goal of antenatal testing is to identify fetuses at risk of intrauterine neurologic injury or death so that these adverse outcomes can be prevented. we want to assess nonstress test (nst) results and some parameters before and after vibro-acoustic stimulation and acupressure. we did a randomized controlled clinical trial in shahid-beheshti hospital in isfahan in 2011. ma...

in this study, the disadvantages of wood, which is widely employed in producing music instruments, are discussed. for example, high moisture sensitivity, low impact resistance, and time-consuming procedure as well as various properties of different species or in several parts of one specimen which are the main problems of wooden music instruments are extensively discussed in this paper. many ma...

Over the past few decades, the propagation of acoustic signals through the human body has found application in medical imaging as well as the treatment of various ailments. Also, many new applications are being continually developed. As the demand for medical ultrasonic devices increases, so does the demand for reliable methods of characterizing the pressure output of the ultrasound transducers...

Technological advances can greatly benefit the scientific community by making new areas of research accessible. The study of animal vocal communication, in particular, can gain new insights and knowledge from technological improvements in recording equipment. Our comprehension of the acoustic signals emitted by animals would be greatly improved if we could continuously track the daily natural e...

INTRODUCTION When there is a change in the physiological pattern of nasal breathing, mouth breathing may already be present. The diagnosis of mouth breathing is related to nasal patency. One way to access nasal patency is by acoustic rhinometry. OBJECTIVE To systematically review the effectiveness of acoustic rhinometry for the diagnosis of patients with mouth breathing. METHODS Electronic ...

In this paper, a random access preamble (RAP) design technique for underwater acoustic cellular systems is proposed. After showing that the conventional RAP used in long term evolution (LTE) systems is not appropriate for underwater acoustic cellular systems, two different types of RAPs (RAP 1 and RAP 2) are proposed to detect the identity of underwater equipment/nodes (UEs) and estimate the ti...