Final answer:
Led Zeppelin signifies 'loudness' through their high-decibel concerts and their profound cultural impact on the music industry. Their energetic performances contribute as much to their legacy as their role as a cultural phenomenon, making their presence loud in both a literal and metaphorical sense.
Step-by-step explanation:
Led Zeppelin, known for its powerful sound, exemplifies loudness both in terms of sheer volume and as a metaphor for their vast cultural impact. When discussing loudness in a musical context, it is usually measured by sound intensity levels and expressed in decibels (dB). A Led Zeppelin concert, categorized at the upper levels of the decibel scale, could easily reach the height of sonic experience, often associated with 120 dB or more, just shy of the threshold of pain. This high volume was part of the band's identity, showcasing their energetic performance and command over their instruments.
Metaphorically, 'loudness' signifies the weight Led Zeppelin carries in the musical world. Their influential power in shaping rock music and transcending the traditional bounds of the genre renders them a 'loud' presence in global culture. The way they harnessed guitar riffs, robust drumming, and vocal prowess translates into an auditory force that shook the music industry. This metaphorical loudness is as significant as the decibel level at their live performances, embedding them in history as a cultural phenomenon.