I Am Loud For My Envelope Sizes (The Litany)

I am blaring

I am booming

Like an explosion

To call out C3

342mm * 458mm

I am deafening

I am shrieking

Like an eruption

To call out C4

229mm * 324mm

I am resounding

I am thundering

Like thunder

To call out C5

162mm * 229mm

I am echoing

I am ear-splitting

Like echoes

To call out C6

114mm * 162mm

I am noisy

I am rowdy

Like a mosquito

To call out C5/6

110mm * 220mm

I am thunderous

I am uproarious

Like a lion

To call out C7/6

81mm * 162mm

I am raucous

I am clamorous

I am vociferous

Like musical instruments

81mm * 114mm

I am reverberating

I am penetrating

Like the sound of music

To call out DL

110mm * 220mm

Much shrill I represent

Audible and strident