Frequency range Amplitude sensitivity Audiometric testing objectives: integrity, structure, function, freedom from infirmity. Normative standards ISO 7029:2000 and BS 6951 Types of audiometry Subjective audiometry Subjective audiometry requires the cooperation of the subject, and relies upon subjective responses which may both qualitative and quantitative, and involve attention (focus), reaction time, etc. Differential testing is conducted with a low frequency (usually 512 Hz) tuning fork. They are used to assess asymmetrical hearing and air/bone conduction differences. They are simple manual physical tests and do not result in an audiogram. Weber test Bing test Rinne test Schwabach test, a variant of the Rinne test Pure tone audiometry is a standardized hearing test in which air conduction hearing thresholds in decibels (db) for a set of fixed frequencies between 250 Hz and 8,000 Hz are plotted on an audiogram for each ear independently. A separate set of measurements is made for bone conduction. There is also high frequency Pure Tone Audiometry covering the frequency range above 8000 Hz to 16,000 Hz. Threshold equalizing noise (TEN) test Masking level difference (MLD) test Psychoacoustic (or psychophysical) tuning curve test Speech audiometry is a diagnostic hearing test designed to test word or speech recognition. It has become a fundamental tool in hearing-loss assessment. In conjunction with pure-tone audiometry, it can aid in determining the degree and type of hearing loss. Speech audiometry also provides information regarding discomfort or tolerance to speech stimuli and information on word recognition abilities. In addition, information gained by speech audiometry can help determine proper gain and maximum output of hearing aids and other amplifying devices for patients with significant hearing losses and help assess how well they hear in noise. Speech audiometry also facilitates audiological rehabilitation management. Speech audiometry may include: Speech awareness threshold Speech recognition threshold Suprathreshold word-recognition Sentence testing Dichotic listening test Loudness levels determination Békésy audiometry, also called decay audiometry - audiometry in which the subject controls increases and decreases in intensity as the frequency of the stimulus is gradually changed so that the subject traces back and forth across the threshold of hearing over the frequency range of the test. The test is quick and reliable, so was frequently used in military and industrial contexts. Audiometry of children Conditioned play audiometry Behavioral observation audiometry Visual reinforcement audiometry Objective audiometry Objective audiometry is based on physical, acoustic or electrophysiologic measurements and does not depend on the cooperation or