By Pat Brown

The Vrms_max loudspeaker power test requires real-time measurement of the Root-Mean-Square voltage of the noise stimulus. RMS measurements have been the subject of controversy since some variables regarding meter integration time, bandwidth, etc. exist. I have see excellent correlation between true RMS meters for noise signals. All meters shown here were used to measure 8Vrms of IEC noise during a recent power test on a line array HF element. The differential in measured RMS level between all of the meters is less than 0.5dB – adequate accuracy for loudspeaker power testing. Read more »

Some of the sections of the site are reserved for SynAudCon Members only. If you want to read more, consider joining the SynAudCon Community for an annual fee of $55. Read more about the benefits of membership.

Some of the sections of the site are reserved for SynAudCon Members only. If you want to read more, consider joining the SynAudCon Community for an annual fee of $55. Read more about the benefits of membership.

Some of the sections of the site are reserved for SynAudCon Members only. If you want to read more, consider joining the SynAudCon Community for an annual fee of $55. Read more about the benefits of membership.

Brenda,

The training was extremely valuable. It was by far one of the best training courses I have taken in a long while.
I have never been a fan of web training, but this course has changed my feelings on that for the following reasons.

1. Having the ability to go back and review all the course material.
2. Being able to rewind and watch something 3 or 4 times until I fully understood the explanation.
3. Doing the chapters at my own speed, so I was not overloaded with all the information at once.

I’m so glad we were able to have access to this training, I look forward to taking additional training from SynAudCon over the next few years.

Avery Prindall, CVE, CTS, DMC-D
VICOM (Virginia Integrated Communication)

Sennheiser “Audio for Video” Sound Academy

August 15, 2011

Orlando, FL

When a microphone or listener is positioned above the floor plane, the reflection produced by the floor modifies what is heard by the listener. This “floor- bounce effect” (FBE) is a normal part of the way that we listen to loudspeakers when an audience is not present to absorb this first-order reflection. This effect must be considered during the equalization process, as it dramatically affects the response observed on high resolution analyzers.

The FBE produces ripples (a comb filter) in the frequency response measured as at a discrete listener position. At one position, the effect could be minimum-phase and “correctable” with equalization. The problem is that the time offset between the direct arrival and the floor reflection is not a global parameter of the space. Each listener position has a unique time-distance relationship to the loudspeaker and its first-order floor reflection.

This means that any electronic compensation used at one seat will be incorrect for most of the others. Read more »

Sennheiser “Recording” Sound Academy

August 17, 2011

Boston, MA

Some of the sections of the site are reserved for SynAudCon Members only. If you want to read more, consider joining the SynAudCon Community for an annual fee of $55. Read more about the benefits of membership.

Sennheiser “ISA” Sound Academy

August 24, 2011

St Louis, MO