Audio Precision Introduces APx 1701 Transducer Test Interface

Audio Precision announced its new APx1701 Transducer Test Interface. The system integrates instrument-grade amplifiers and microphone power supplies for designers and production test engineers seeking clear insight into the behavior of their electro-acoustic devices. The new APx1701 raises the performance bar for electro-acoustic tests, introduces low-noise, low-distortion and flat-response accessory for loudspeaker, headphone and microphone measurements.

Recently, there has been increased demand for loudspeaker 3-D directivity measurements both in the near- and far-fields for different applications. New holographic near-field scanning techniques provide new ways to determine the sound pressure at any point in the 3-D sound field. This article was originally published in Voice Coil, May 2015.

In this article, the author addresses possible scenarios when measuring loudspeaker input impedance at drive levels closer to those used in actual operation, including problematic examples with vented loudspeaker enclosures and constant voltage distributed system transformers. This article was originally published in Voice Coil, February 2011.

Listen, Inc., has released SoundCheck 14. This new version of the company’s audio measurement software includes many features to simplify user setup, such as a redesigned setup wizard that guides you through the process of copying your settings and sequences to the new version. SoundCheck 14 is also the first software version available as a native 64-bit application for use on Mac OS X.

The question of phase response often arises when measuring loudspeaker systems. In this article, the author reviews setting the receive delay within a measurement system so that the displayed phase response is the “correct” one. This article was originally published in Voice Coil July 2011.

The specification of a loudspeaker’s sensitivity is probably one of the most common, yet perhaps one of the most misunderstood. In the past, and still today, it is common to see the magnitude response of a loudspeaker system reduced to a single number as a sensitivity rating. Article originally published by Voice Coil, April 2010.