Instrumentation issues in collecting ear‐canal acoustic distortion products.

Instrumentation issues in implementation science

BACKGROUND Like many new fields, implementation science has become vulnerable to instrumentation issues that potentially threaten the strength of the developing knowledge base. For instance, many implementation studies report findings based on instruments that do not have established psychometric properties. This article aims to review six pressing instrumentation issues, discuss the impact of ...

Frequency dependence of acoustic distortion products in a locally active model of the cochlea.

In two-tone experiments it has been shown that acoustic distortion products are "tuned" as a function of primary frequency ratio, that is, at a certain frequency ratio a maximum in emission occurs. Several authors maintain that this "tuning" is caused by band-pass filtering of the distortion products as they are coupled back to the basilar membrane. In this paper one possible other cause for th...

The active earcanal.

In the past, the human earcanal has primarily been thought of as a passive conduit for sound. Several studies, reported here, explored evidence of how active the earcanal is. The "active earcanal" is conceptualized and aspects of it are viewed through three timeframes: jaw-induced canal change in seconds/minutes, cerumen production in weeks/months, and aging in years. The influence of each of t...

Using acoustic distortion products to measure the cochlear amplifier gain on the basilar membrane.

Most models of the cochlea developed during the last decade have explained frequency selectivity and sensitivity of the cochlea at threshold by the use of power amplification of the acoustic wave on the basilar membrane. This power amplification has been referred to as the cochlear amplifier (CA). In this paper, a method to measure the cochlear amplifier gain as a function of position along the...

Collecting and representing parallel programs with high performance instrumentation