Led by Ron Sauro, Owner and Chief Scientist of NWAA Labs, Technomad's range of IP56-rated weatherproof loudspeakers underwent GLL testing for the first time.
"GLL testing is a critical step forward in accurate data collection for loudspeaker design engineers, particularly those specifying a venue that will include clusters of multiple loudspeakers," said Sauro
"Engineers and consultants who download the GLL
files can more accurately predict what will happen in a room or facility when multiple cabinets are used, and also predict and better understand the interaction between all the cabinets and drivers in the loudspeakers.
format provides a very accurate resolution of phase that is superior to how we previously measured and presented data."
added that manufacturers like Technomad benefit from GLL
testing through physically assembling loudspeakers in a "virtual reality" or simulated environment, measuring the drivers without crossovers or digital signal processing, and making design changes that are instantly noticed.
Update: Interview with Ron Sauro
from Pro AV Magazine
5-Minute Interview: Ron Sauro
A former NASA engineer and scientist, Sauro now heads up NWAA Labs, a Santa Clarita, Calif.-based lab for testing loudspeakers and materials for the audio industry Among other things, the lab tests loudspeakers for conformance to the Generic Loudspeaker Library specification, which was introduced at the AES convention in New York in October 2006.
: Tell us a little about NWAA Labs
: NWAA Labs
was founded to fulfill a long-standing, but unrealized industry requirement for independent, standardized loudspeaker and acoustic materials testing.
I was able to adapt the array I designed at NASA
for magnetic data acquisition for use in gathering sound data at NWAA Labs
This design allows for an exponential increase in the rate of data acquisition, reducing the time involved from many hours, to often less than 40 minutes, thus minimizing the environmental variations that hamper accurate measurement, particularly phase measurements.
: What is the Generic Loudspeaker Library?
: The Generic Loudspeaker Library
is a method of inputting, calculating, and displaying complex speaker directivity data.
It's accomplished by measuring individual drivers, in place, and then mathematically integrating these balloons with crossover transfer functions.
: It is especially useful for the construction and simulation of line arrays and complex cluster arrangements in order to predict lobing and other acoustic results more accurately.
In other words, GLLs can be used by simulation programs to accurately predict real-world performance of complex and variable configurations of loudspeaker boxes and arrays.
: How can AV pros use GLL results and GLL files?
: Consultants can take advantage of independent testing to confirm equivalent performance between loudspeaker boxes created by different manufacturers.
: We are receiving more and more requests from consultants and contractors for GLL data and more than a dozen manufacturers have adopted the GLL format. (Technomad Associates of Boston most recently received GLL certification from NWAA Labs
for its IP56-rated weatherproof loudspeakers.)