resonancethe reinforcement of vibrations when their frequency matches a system's natural frequencyAcoustic resonance in the concert hall was optimised to enhance the quality of the sound.NoteAcoustic resonance in the concert hall was optimised to enhance the quality of the sound.Elon.io is an online learning platformWe have an entire course teaching IELTS Vocabulary — Band 7+ grammar and vocabulary.Start learning IELTS Vocabulary — Band 7+ now