Previous ed: 1954.
|Statement||British Standard Institution.|
|The Physical Object|
bs specification for a reference zero for the calibration of pure-tone audiometers. data for certain earphones used in commercial practice. acoustics - reference zero for the calibration of audiometric equipment - reference equivalent threshold sound pressure levels for pure tones and insert earphones BS (): SPECIFICATION FOR NORMAL EQUAL-LOUDNESS LEVEL CONTOURS FOR PURE TONES UNDER FREE-FIELD LISTENING CONDITIONS. ISO Acoustics — Standard reference zero for the calibration of pure tone air conduction audiometersCategory: w. IEC (Novem ) "Audiometers. Pure-tone audiometers". BS EN ISO () "Acoustics. Standard reference zero for the calibration of pure tone air conduction audiometers" BS EN () "Electroacoustics. Simulators of human head and ear. Mechanical coupler for the measurement of bone vibrators"Purpose: evaluate hearing acuity.
(a) Audiometric tests shall be pure tone, air conduction, hearing threshold examinations, with test frequencies including , , , , , , and Hz. Tests at each frequency shall be taken separately for each ear. (b) Audiometric tests shall be conducted with audiometers (including microprocessor audiometers) that meet the specifications of and are maintained and used in. ISO Acoustics—Reference Zero for the Calibration of Audiometric Equipment— Part 8: Reference Equivalent Threshold Sound Pressure Levels for Pure Tones and Circumaural Earphones. Acoustics - Standard reference zero for the calibration of pure-tone air conduction audiometers (ISO ) Subscribe on standards with our subscription service. When you use our service you can be assured the latest editions and easy access. reference zero for the calibration of pure tone air conduction audiometers and Addendums 1, 2, and 3 IEC Part 1 () Pure Tone Audiometers: Part 2 (x) Equipment for speech audiometry, Part 3 (x) Specifications of reference audiometric test signals of short duration, Part 4 (x) Equipment for extended high frequency audiometryFile Size: KB.
acoustics - reference zero for the calibration of audiometric equipment - part 4: reference levels for narrow-band masking noise: iso acoustics - standard reference zero for the calibration of pure tone air conduction audiometers: iec iec The specification were developed in , revised in & again revised in There were further revisions in The ANSI S Specification for Audiometers represents our most current and best resource for information regarding audiometers. It also contains reference threshold levels for all commonly used transducers in one standard. Narrow Band Noise Calibration: ___ level (measured using an SLM with octave band filter) calibrated in dB EML -___ ___ ___: SPL of a masking signal that masks a pure tone at 0 dB HL 50% of the time when the masking signal and pure tone are presented to the same ear. Minimum requirements for pure tone and speech audiometers (ANSI S) Transducers, Hearing Levels (Test Frequencies), Test Signal Switching, Reference Tone, Speech Input, Masking, Routing of Masking, Subject Response System, Signal Indicator, Audible Monitoring, Talk Back System.