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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It then calculates the voltage required to produce 1 mW into the rated impedance.

This approach provides the user with the flexibility to measure all or some of the characteristics of their headphone. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. This sequence uses a pink noise stimulus to characterize the passive, active and total attenuation of noise iex headphones. You may find similar items irc these categories by selecting from the choices below:.

A series of post processing steps calculates the attenuation curves, their average values and shows them on the final display. It then enters a loop which will run 5 times. Take the smart route to manage medical device compliance.

The sequence then goes through a series of acquisition steps to generate four iwc curves which are then post-processed to calculate crosstalk.

Calibrate the microphones per the instructions in the SoundCheck manual. It is recommended that the sequences be run directly from the IEC folder. Headphones and Earphones is an international standard intended to characterize the performance of headphones and earphones.

If the answer is No, the sequence jumps to post-processing steps which calculate passive attenuation and the final display step. Relink dialog Here is a list of sequences and their default signal paths unique paths are in bold: If passive, connect to the headphone amp or separate audio power amplifier You are ready to start the sequence.

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A statistics step calculates the mean of the 3 unoccluded measurements.

If more than 4 input channels are available, all input signal paths may be assigned to separate hardware channels. The data from each loop iteration is displayed as it is acquired. Once calibrated, position the microphones 0.

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Crosstalk and radiation curves are then shown on the final display. The sequence prompts the operator to enter the rated voltage and rated impedance of the DUT. Headphone Voltage Sensitivity Final Display. FebDecember 17, – 3: We use cookies to make our website easier to use and to better understand your needs. Software Requirements SoundCheck Five separate sequences are provided, each designed to measure specific characteristics.

Connect the impedance boxes between the headphone amp out and headphone input. A pink noise stimulus is played from the noise speakers and recorded by the occluded ears. Please complete the short form below all fields are required. The sequence first plays a stepped sine through both channels of the DUT and captures the sound radiation from the DUT using 2 reference mics.

It can also be used to characterize the passive attenuation only of a standard non-ANC headphone.

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Test Setup for measuring headphone voltage sensitivity. Your basket is empty.

Headphones and earphones Status: This sequence satisfies the requirements of Section 8. Find Similar Items This product falls into the following categories. Hardware Requirements In order to run the sequences, the following hardware is required: You may experience issues viewing this site in Internet Explorer 9, 10 or Please download Chrome or Firefox or view our browser tips.

You are ready to start the sequence. There are several unique Signal Paths used in the sequences which are not a part of the default SoundCheck installation. The Hz recorded time waveforms are processed using heterodyne analysis to derive their fundamental values.

Setup System, Hardware and Calibration Before attempting to run any of the sequences, read the following setup instructions.

BS EN 60268-7:2011

This value is converted to dBV and used to calculate the IM and difference frequency stimulus levels. If the answer is Yes, the user is prompted to turn the ANC on and the sequence repeats the passive measurements. Worldwide Standards We can source any standard from anywhere in the world. 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.

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