IEC 60268 7 PDF

IEC SOUND SYSTEM EQUIPMENT –- PART 7: HEADPHONES AND EARPHONES. Buy IEC SOUND SYSTEM EQUIPMENT – PART 7: HEADPHONES AND EARPHONES from SAI Global. IEC Ed. Sound system equipment – Part 7: Headphones and earphones IEC (E), is applicable to headphones, headsets, earphones.

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Once calibrated, position the microphones 0. This approach provides the user with the flexibility to measure all or some of the characteristics of their headphone. Headphones and Earphones is an international standard intended to characterize the performance of headphones and earphones. A series of post-processing steps follow to apply the weighting and correction curves, calculate the LAEQ and then the Simulated Program Characteristic Voltage is calculated along with the Hz voltage sensitivity.

It is recommended that the sequences be run directly from the IEC folder. Calibrate the microphones per the instructions in the SoundCheck manual.

Search all products by. First, a pink noise stimulus is played from the noise speakers and recorded by the unoccluded ears. Worldwide Standards We can source any standard from anywhere in the world. You may experience issues viewing this site in Internet Explorer 9, 10 or The sequence then goes through a series of acquisition steps to generate four fundamental curves which are then post-processed to calculate crosstalk.

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The spectra are then power summed to derive a single SPL value and the Hz fundamentals are post processed to derive their SPL values.

Noise speakers are set up adjacent to the HATS left and right ears. The sequence 602688 plays a stepped sine through both channels of the DUT and captures the sound radiation from the DUT using 2 reference mics. Find Similar Items This product falls into the following categories.

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It can also be used to characterize the passive attenuation only of a standard non-ANC headphone. This sequence uses a pink noise stimulus to characterize the passive, active and total attenuation of noise cancelling headphones. If more than 4 input channels are available, all input signal paths may be assigned to separate hardware channels.

IEC Headphone Sequences – Listen, Inc.

Matthew Miller November 15, – 6: Learn more about the cookies we use and how to change your settings. Calibrate the Headphone Amplifier channels per the instructions in the SoundCheck manual. Software Requirements SoundCheck Please complete the short form below all fields are required.

A series of post processing steps calculates the attenuation curves, their average values and shows them on the final display. This sequence satisfies the requirements of Section 8.

Take the smart route to manage medical device compliance. The play and record acquisition takes place 3 times and the user is prompted to reposition the DUT on the HATS in between acquisitions. We use cookies to make our website easier to use and to better understand your needs. It then enters a loop which will run 5 times. The sequence uses a stepped sine stimulus to measure frequency response, THD and impedance, a composite signal of 70 Hz and Hz with an amplitude ratio of 4: Setup System, Hardware and Calibration Before attempting to run any of the sequences, read the following setup instructions.

Relink dialog Here is a list of sequences and their default signal paths unique paths are in bold: Headphones and earphones Status: Marking, Microphones, Audio systems, Ratings, Designations, Instructions for use, Headphones, Classification systems, Frequency response, Earphones, Audio equipment, Voltage measurement, Impedance measurement, Testing conditions, Preamplifiers, Comparative tests, Acoustic measurement, Electrical wave measurement, Electrical properties and phenomena, Acoustic testing.

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This value is converted to dBV and used to calculate the IM and difference frequency stimulus levels. Click to learn more. A pink noise stimulus is played from the noise speakers and recorded by the occluded ears. There are several unique Signal Paths used in the sequences which are not a part of the default SoundCheck installation.

IEC-60268-7 Headphone Test Sequences

Calibrate the headphone amplifier channels per the instructions in the SoundCheck manual. Headphone Voltage Sensitivity Final Display. The sequence prompts the operator to enter the rated voltage and rated impedance of the DUT. No – I don’t want to receive the latest audio test information by email. If passive, connect to the headphone amp or separate audio power amplifier You are ready to start the sequence.

BS EN – Sound system equipment. Headphones and earphones

Five separate sequences are provided, each designed to measure specific characteristics. The Hz recorded time waveforms are processed using heterodyne analysis to derive their fundamental values. The content you have requested is available only to oec visitors.

Please download Chrome or Firefox or view our browser tips. FebDecember 17, – 3: You are ready to start the sequence.

If the answer is Yes, the user is prompted to turn the ANC on and the sequence repeats the passive measurements. Crosstalk and radiation curves are uec shown on the final display.