cacophony
/kəˈkɒfəni कˈकॉफ़नि/ noun [sing.] ( formal ) a mixture of loud, unpleasant sounds; noise ऊँचे अप्रिय स्वर; बेसुरापन; कर्णकटु ध्वनि; कोलाहल
I could not think in the cacophony of rush-hour traffic.