Audio Measurement for Broadcast Studios

TL;DR

Broadcast environments demand precision: flat monitoring response within ±2 dB, RT60 below 0.3s, background noise below NC-20, and consistent signal chain performance. SonaVyx provides transfer function analysis and SPL measurement for broadcast quality control.

Acoustic Measurement for Broadcast Studios

Broadcast studios demand some of the most precise acoustic environments in the audio industry. Whether you are building a radio broadcast booth, television studio, podcast room, or voiceover suite, accurate measurement ensures your space meets the exacting standards required for professional content production.

Monitoring Accuracy

Broadcast monitoring requires a frequency response flat within plus or minus 2 dB from 80 Hz to 16 kHz at the listening position. Use SonaVyx's Transfer Function mode with pink noise to verify monitor calibration. The RTA mode provides a quick visual check, while the transfer function gives you the coherence data needed to confirm measurement validity. Any deviation greater than 3 dB should be addressed with room treatment or monitor EQ adjustment.

Reverberation Control

Broadcast studios typically target RT60 values below 0.3 seconds across all octave bands. This dry acoustic environment ensures that the recorded voice sounds clean and intimate, without room coloration. Use SonaVyx's RT60 measurement tool with a log sweep to verify decay times in each octave band from 125 Hz to 8 kHz. Pay special attention to low-frequency decay, which is often longer due to insufficient bass trapping.

Background Noise

The NC (Noise Criteria) rating for broadcast studios should be NC-20 or lower, which corresponds to approximately 25-30 dBA. SonaVyx's SPL meter measures the background noise floor with A-weighting and displays the NC rating automatically. Common noise sources include HVAC systems, computer fans, lighting ballasts, and external traffic. The noise dose monitor can log background levels over time to identify intermittent noise events that may not be apparent during a spot check.

Speech Intelligibility

While broadcast studios are primarily about recording rather than reinforcement, STI measurement is valuable for evaluating talkback systems, studio monitoring paths, and IFB circuits. Target STI values above 0.75 (Excellent) for any speech communication path within the broadcast chain.

Recommended SonaVyx Workflow

Start with the System Check workflow to assess noise floor and basic frequency response. Follow with dedicated RT60 measurement at multiple positions. Use the AI Diagnostic for an overall assessment and specific treatment recommendations. Generate a Technical Commissioning report for facility documentation.