GL Conveys its Evaluation and Testing Services of Public Address (PA) Systems

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GL Communications Inc., conveyed today its Evaluation and Testing Services of Public Address (PA) Systems at a public transit center.

Evaluation of Public Address System

Evaluating an audio system and coming up with a design to improve its intelligibility are specialties that are best handled by acoustic experts. GL conducts a comprehensive study to assess the Public Address (PA) system and recommends steps to improve.

GL Communications Inc. a leader in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, conveyed today its Evaluation and Testing Services of Public Address (PA) Systems at a public transit center.

Speaking to the press, Mr. Vijay Kulkarni, CEO of the company said, “Speech intelligibility is an important characteristic to be considered in the design of Public Address (PA) system. A PA system in a metro station or a public transit center is used to announce train or bus arrival/ departure, general information, and emergency information and instructions to passengers. Poor speaker characteristics, inadequate sound levels, reverberations, and delays can degrade sound quality and make even an expensive sound system perform at a sub-par level. Addressing these issues at the design stage through proper planning and acoustic simulation studies would improve a PA system's overall performance and customer satisfaction, and minimize the need for expensive post-installation modifications.”

He added, “Evaluating an audio system and coming up with a design to improve its intelligibility are specialties that are best handled by acoustic experts. GL conducts a comprehensive study to assess the Public Address (PA) system and recommends steps to improve speech intelligibility and coverage. We make our recommendations based on the need to meet or exceed NFPA72/2006 requirements for an industry standard Common Intelligibility Score of 0.7.”

Mr. Kulkarni further added, “Our engineers use Speech Transmission Index for Public Address (STI-PA) standard to assess speech intelligibility objectively. Enhance Acoustic Simulator for Engineers (EASE) software is used to conduct simulation studies and recommend steps to improve intelligibility and increase coverage area. Our engineers also create 3-D computer models using as-built drawings and detailed site measurements. With the use of 3-D models and ambient noise measurements, acoustic environment of the areas requiring PA coverage was simulated and our engineers also analyze the results of simulations studies and recommend optimal speaker type, locations, and power levels.”

About GL Communications Inc.,

Founded in 1986, GL Communications Inc. Provides technical consulting, engineering and testing services in wireless, telecom, and IT disciplines. Our customers include telecom wireless and landline carriers, mass transit and public safety systems nationwide. We have designed hundreds of wired and wireless telecom network systems over the past 23 years.

GL is a DBE/MBE firm certified by Maryland's Department of Transportation (MDOT), Washington Metropolitan Area Transit Authority (WMATA), Virginia Department of Transportation (VDOT), and South Eastern Pennsylvania Transportation Authority (SEPTA).

GL’s TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, OC-12, STM-1, STM-4, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.

GL’s VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A, B, C, GSM, iSAC, and many more. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.

GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) is available.

GL’s Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.

GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GL’s compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.

GL’s wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.

GL’s Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.

GL’s Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.

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Gururaj S D