Minimum audibility curve is a standardised graph of the threshold of hearing versus frequency for an average human, and is used as the reference level when measuring hearing loss with an audiometer as shown on an audiogram.
Audiograms are produced using a piece of test equipment called an audiometer, and this allows different frequencies to be presented to the subject, usually over calibrated headphones, at any specified level. The levels are, however, not absolute, but weighted with frequency relative to a standard graph known as the minimum audibility curve which is intended to represent 'normal' hearing. This is not the best threshold found for all subjects, under ideal test conditions, which is represented by around 0 Phon or the threshold of hearing on the equal-loudness contours, but is standardised in an ANSI standard to a level somewhat higher at 1kHz There are several definitions of the minimal audibility curve, defined in different international standards, and they differ significantly, giving rise to differences in audiograms according to the audiometer used. The ASA-1951 standard for example used a level of 16.5dB SPL at 1kHz whereas the later ANSI-1969/ISO-1963 standard uses 6.5dB SPL, and it is common to allow a 10dB correction for the older standard.
How to facilitate successful use of the Widex Audibility Extender (AE) in children.(how-to and case studies: PEDIATRICS)
Jul 01, 2008; The AE utilizes Linear Frequency Transposition for children and adults who are unable to achieve audibility of soft,...
US Patent Issued to Dolby Laboratories Licensing on Nov. 5 for "Method and Apparatus for Maintaining Speech Audibility in Multi-Channel Audio with Minimal Impact on Surround Experience" (California Inventor)
Nov 05, 2013; ALEXANDRIA, Va., Nov. 5 -- United States Patent no. 8,577,676, issued on Nov. 5, was assigned to Dolby Laboratories Licensing...