Lecture Auditorium System Solution
I. Industry Background
• With the continuous improvement of China’s comprehensive national strength and the rapid development of modern information technology, enterprises and public institutions have put forward higher requirements for intelligent and modern office construction. Traditional meeting rooms, which merely support basic audio receiving and simple communication, have gradually evolved into multi-functional comprehensive platforms for information interaction and resource sharing. A full range of electronic devices, including projectors, video display equipment, video recording and playback systems, and professional sound reinforcement systems, have been widely applied in modern meeting scenarios. This trend has driven meeting room systems to achieve professional configuration, diversified functions and powerful operational performance. Modern meeting systems have thus developed into standardized multimedia conference systems, with their overall design concepts undergoing comprehensive upgrading and innovation.
II. Demand Analysis
• The construction of the conference room project adheres to the core principles of “demand orientation, forward-looking planning, reliable feasibility and sustainable operation”. The project aims to build an all-in-one conference space compatible with daily meetings, video conferences and multi-functional events, featuring advanced design concepts, stable system performance, comprehensive functions and efficient command and control capabilities.
1. The system supports convenient and efficient unified management of all audio and video subsystems, simplifying daily operation and maintenance workflows.
2. The system supports convenient and efficient unified management of all audio and video subsystems, simplifying daily operation and maintenance workflows.
3. The audio reinforcement system features simple operation and flexible functional expansion to meet the diversified application demands of various conference scenarios.
4. A centralized intelligent control system is deployed to realize one-key and simplified operation of the entire integrated system, improving conference efficiency.
5. The venue comprehensively supports remote video conferences, daily routine meetings and various large-scale multi-functional activities.
6. The system meets high-standard requirements for high-definition signal transmission, multi-terminal video signal access and stable high-quality signal display.
7. Fully satisfy the on-site discussion and microphone speaking demands for indoor conference activities.
III. Design Standards
IV. System Topology Diagram
V. Actual Performance
1. Sufficient Sound Pressure Level On Site
With the development of modern recording technology and the improvement of people’s auditory appreciation, the system is required to have adequate dynamic headroom to reproduce high-dynamic audio signals without distortion. The loudspeakers selected for this design feature high power and high sensitivity, matched with power amplifiers with sufficient power reserve. Calculations verify that the sound pressure level in the finished meeting room will fully meet the index requirements for Class I auditoriums specified by national standards.
2. Excellent Sound Field Uniformity
Loudspeakers are arranged into point-source arrays according to the layout and area of the audience area, which effectively reduces the comb filtering effect of the array. All selected loudspeakers are constant-directivity types to enhance speech intelligibility. The entire audience zone falls within the coverage of the loudspeakers, promising uniform sound distribution, which is also validated by computer simulation calculations.
3. Smooth Transmission Frequency Response
Parametric equalization tuning is applied to each loudspeaker channel, minimizing variations in sound beam width across all frequencies within the directivity control range, free of prominent peaks and notches. In addition, each loudspeaker channel is connected to a room equalizer integrated in the digital AV processing system. It provides sufficient tuning tools to compensate for the impact of the coupled acoustic space between the audience hall and screen area on frequency response, ensuring smooth overall transmission frequency characteristics of the sound reinforcement system.
4. High Speech Gain
The loudspeaker layout is rationally planned with the entire audience area covered by the main sound reinforcement speakers. The constant-directivity horns equipped on the selected loudspeakers enable rapid attenuation of sound energy beyond the -6dB coverage angle. Therefore, the system can reliably achieve the targeted speech gain.
5. Strong System Compatibility and Easy Expandability
Based on equipment architecture analysis, the design prioritizes the above measurable acoustic indicators while taking practical usage into consideration to maximize system adaptability. Apart from conference sound reinforcement, the system also supports multimedia music playback with an effective reproduction frequency range of 35Hz to 18kHz. All equipment in the system reserves ample interfaces and space for future function expansion.
