The purpose of this investigation was to evaluate the sensitivity and specificity of the following acoustic-immittance protocols and their constituent measures for detection of middle-ear effusion in children: (a) tympanometric width; (b) absent ipsilateral acoustic reflex; (c) ASHA guidelines; (d) tympanometric peak pressure; and (e) static-acoustic middle-ear admittance. The middle-ear sample...

CONCLUSION High frequency immittance measurements demonstrate promise in clarifying middle ear status for neonates but age- and gender-specific norms should be consulted. OBJECTIVE To describe high frequency immittance measurements using a 1000 Hz probe tone for a sample of 278 neonatal ears (0-4 weeks of age) in order to compile normative tympanometric and acoustic reflex criteria. SUBJECT...

The predicted real-ear-to-coupler difference (RECD) values currently used in pediatric hearing instrument prescription methods are based on 12-month age range categories and were derived from measures using standard acoustic immittance probe tips. Consequently, the purpose of this study was to develop normative RECD predicted values for foam/acoustic immittance tips and custom earmolds across t...

Immittance Spectral Pairs (ISP) form a new set of parameters proposed for presenting the LPC filter. ISP is close to LSP and owns similar ‘niceties’, yet it is different. For a filter of order n it consists of a ‘gain’ and n-1 ‘frequency’ parameters instead of n ‘frequency’ parameters for LSP. In regarding LPC as a pseudo model for the vocal tract ISP may represent the immittance at the glottis...

The purpose of the present investigation was to compare the performance of the acoustic otoscope/DPU-411 printer and acoustic immittance with otoscopic examinations by a physician for the detection of middle ear effusion (MEE). Three hundred and two patients (11 months to 69 years) were evaluated with the acoustic otoscope, acoustic immittance, and otoscopic examinations. The patients were divi...

43S Middle ear muscle reflex (MEMR) measurements have been a part of the standard clinical immittance test battery for decades as a cross-check with the behavioral audiogram and as a way to separate cochlear from retrocochlear pathologies. MEMR responses are measured in the ear canal by using a probe stimulus (e.g., single frequency or broadband noise) to monitor admittance changes elicited by ...