201: number of dialects (from 288 cities) reported to be supported by the voice recognition technology of the company iFlytek
4,000: distance, in kilometers, that the sound of airguns, used in oil and gas exploration underwater, can travel
147,000,000,000: estimate annual cost, in euros, of noise pollution, per France’s Environmental Transition Agency (aka ADEME)
Sources: dialects (techinasia.com), airguns (phys.org), noise (lemonde.fr)