## The End of the Volume Wars in Spain: New Advertising Regulations
A common experience among millions of viewers is a sudden jolt of loudness when advertising blocks interrupt their favorite shows, often prompting a frantic search for the remote control. This jarring experience may soon become a thing of the past in Spain, thanks to new regulations establishing technical criteria to monitor the sound levels of advertisements.
### The Law: A Regulatory Breakthrough
The National Markets and Competition Commission (CNMC) has taken a significant step by introducing criteria to ensure that the sound level of advertisements does not surpass that of the programming. This is outlined in the agreement INF/DTSA/083/25, published on November 20, 2025. These regulations are pivotal as they extend the existing guidelines that will govern the entire audiovisual ecosystem from summer 2025. This includes video streaming platforms like YouTube, on-demand services, music applications like Spotify, pay television, and both conventional and digital radio stations. Non-compliance with these regulations may lead to serious penalties, including fines of up to €200,000.
### Understanding the Loudness Measurement: dB vs. LUFS
For decades, the advertising sector has exploited a loophole in traditional sound measurement. Conventional decibel (dB) metrics rely solely on the electrical amplitude of sound signals, overlooking how the human brain perceives loudness. Consequently, two audio tracks can register similar dB levels while sounding distinctly different in perceived volume.
The underlying issue lies in frequency composition. The human auditory system perceives sounds unevenly based on pitch, making mid frequencies, particularly between 1 and 4 kHz (where the human voice resides), much more audible than bass or high treble. Advertisers have exploited this phenomenon to create ads that seem louder without actually exceeding decibel limits.
### The Emergence of LUFS
The introduction of the Loudness Units relative to Full Scale (LUFS) measurement system addresses this issue. Adopted in August 2010 by the European Broadcasting Union, LUFS integrates a weighting filter that mirrors the human ear’s sensitivity. This means measurement reflects actual perception, not just electrical output.
### Spain Aligns with European Standards
In March 2025, Spain introduced Royal Decree 250/2025, setting an objective sound level for Spanish Digital Terrestrial Television (DTT) at -23.0 LUFS with a tolerance of ±1.0 LU. This figure aligns perfectly with the standard recommended by the European Broadcasting Union since 2010. The CNMC has since expanded these regulations beyond traditional television usage.
### Gradual Implementation and Challenges
The CNMC has chosen a gradual approach to implementation, allowing content platforms up to 2027 to adapt without needing to immediately reencode millions of hours of existing content. Operators can adopt alternative technical measures that maintain an equivalent level of sound protection.
While traditional broadcast networks can control every aspect of their programming from dedicated production rooms, the streaming landscape presents unique challenges. With ads dynamically inserted through programmatic systems on platforms like YouTube, which features content generated by millions of users with varying production quality, real-time sound monitoring becomes a logistical challenge.
### Conclusion: A New Era for TV Audiences
With these groundbreaking regulations, Spain is paving the way for a more enjoyable viewing experience. As issues of loudness in advertising are systematically addressed, audiences can look forward to a future with fewer interruptions and better sound quality while enjoying their favorite programs.