noisy

Making a noise, especially a loud unpleasant sound

the noisy crowd.

For obvious reasons the percussion is normally arranged along the back of the platform, whether centrally or to one side, and sometimes also in two tiers, the heavy, noisier instruments behind, and the pitched, agile instruments such as vibraphone, marimba, etc. in front. An outstanding exception, however, exists in Roberto Gerhard's Epithalamion where the composer expressly desired that the all-important kitchen department be spread out in front of the strings and hence nearest the audience.

Full of noise.

a noisy bar

This market is the noisiest and swarmiest centre of noisy and swarming Florence, and I always like to pass through it on that account.

Unpleasant-looking and causing unwanted attention

noisy clothes

Accompanied by or introducing random fluctuations that obscure the real signal or data

Looked at more carefully, and over a longer time period, the relationship between the economy and the incumbent’s performance is positive, but noisy. “The incumbent wins when the economy is good” is a useful, weak prior, but not an iron law, and one that historically has had many exceptions.