To the extent that a lease has a "quiet enjoyment" clause, it is highly unlikely that the clause would increase the landlord's duties above and beyond the common law level -- and at common law, the issue is not about noise, but is about title. Consistent with that, even when present, a typical quiet enjoyment clause within a lease has nothing to do with the noise level or activity level of other tenants, and is instead a guarantee that if the tenant complies with the lease neither the landlord nor anybody else with a title-based claim to the property will unreasonably interfere with the tenancy.