and an anechoic room! However, decent results can be obtained using a simple trick. Specialized equipment would be needed at this stage, such as a calibrated microphone, a calibrated sound level meter. If headphones are now good enough to run a hearing test, yet it must be ensured that your computer and headphones are calibrated: they have to output just the right amount of 'loudness' required to run a standardized test. Today, most headphones have a pretty flat frequency curve within the frequency range used in a hearing test. Until recently, it was assumed that such calibrated hearing tests were impossible to conduct online. Results of such a hearing test are often summarized in an audiogram, a graph showing your hearing thresholds across various frequencies such as the one depicted aside. This is what your ENT measures when you are placed in an isolated cabin and asked to listen to individual test tones. Calibrated tests offer you an indication of your absolute hearing thresholds. Possible maximum limits when reaching the output current limit are clearly indicated.First, let's introduce an important distinction between online hearing tests: they can be calibrated or not.

The output level corresponds over a wide range of loads to the set output voltage compensating the output impedance of the generator. The saved settings may also be transferred to other MR-PRO instruments. Up to 10 complete instrument configurations can be stored in the internal flash memory and reloaded for repetitive tasks. The following parameters of the connected load are shown: MR-PRO measures the impedance, phase and power rating of distributed speaker systems at selectable frequencies. Additionally an optional Cable Test Plug may be used for single ended installations. The MR-PRO verifies the correct XLR cable wiring, detecting all common XLR wiring faults with a precise description, such as вЂњ2-3 CrossedвЂќ or вЂњPin 2 openвЂќ. Providing a detailed view of the connected load for rapid fault finding Wav-file exchange is simplified via the USB port. You may store additional user test signals as uncompressed wav-files in the MR-PRO memory. The Minirator MR-PRO offers a range of additional factory test files, e.g. Testing is carried out in combination with the XL2 Audio and Acoustic Analyzer or Minilyzer ML1. The saw-tooth waveform is an ideal stimulus with only moderate stress to speakers. Test signal for measuring the polarity of speakers and audio signals. The Minirator also generates gated pink noise (on/off cycle 1 - 9 seconds) for convenient RT60 measurements with the XL2 Audio and Acoustic Analyzer. Pink or white noise is synthesized with high spectral density, normal amplitude distribution and with infinite cycle duration.

Testing is carried out in combination with the XL2 Audio and Acoustic Analyzer. It suits the accurate setup of delay line arrangements, thus the directionality of the signal source will be optimized. This is the designated reference signal to measure the acoustic propagation delay time from speaker to speaker in e.g. Typical applications are recording of frequency responses, impulse response measurements and acoustic assessment of rooms. The chirp signal is a logarithmic or linear gliding sine sweep signal with continuous frequency increase over time. Audio analyzers automatically trigger to this signal and record the frequency response of a device under test. The start/stop frequency, step time and a step resolution as fine as 1/12th octave can be adjusted.

Selectable frequencies from 10 Hz to 20 kHz.

The frequency steps interval can be set to as low as 0.1Hz. Minirator generates pure sine waveforms at user-selectable frequencies and amplitudes.

Xlr test tone generator