IEC-60268-7 Headphone Sequences

IEC-60268-7: Sound System Equipment – Part 7: Headphones and Earphones is an international standard intended to characterize the performance of headphones and earphones. The standard itself is a lengthy document, 9 Sections and 3 Annexes covering 46 printed pages. These SoundCheck sequences focus on the electro-acoustic tests which are detailed in Section 8 “Characteristics to be specified and their method of measurement”.

Five separate sequences are provided, each designed to measure specific characteristics. This approach provides the user with the flexibility to measure all or some of the characteristics of their headphone.


Headphone Testing – a comprehensive overview

Author: Steve Temme and Brian Fallon

With the headphone market growing towards $10 billion worldwide, and products across the price spectrum from under a dollar up to thousands, there are many and diverse quality expectations and test requirements. Many audio engineers have moved across from the shrinking loudspeaker industry to the burgeoning headphone marketplace. Although many of the characteristics that make for a good in-room listening experience with a loudspeaker – good frequency response, low distortion, no Rub & Buzz or loose particles, etc. – also apply to headphones, and many of the same test principles apply, there are some significant differences and additional issues associated with headphone measurement that need to be taken into account. These include couplers and associated correction curves, acoustic seal, fixturing and additional tests such as L/R tracking. In this paper we outline the issues that are common to testing all types of headphones as well as those specific to particular types of headphones such as Bluetooth and USB headphone testing, noise-cancelling headphones, and Max SPL measurements to prevent hearing loss.

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Automated Perceptual Rub & Buzz Distortion Measurement

Author: Steve Temme.  Reprinted from the September 2011 issue of Voice Coil.

In this article, Steve Temme discusses Listen’s latest work on perceptual Rub & Buzz measurement.
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