X0407 4 2023-03-19 0 0001656536 Decibel Therapeutics, Inc. DBTX 0001536290 Kapusta Matthew C C/O DECIBEL THERAPEUTICS, INC. 1325 BOYLSTON STREET, SUITE 500 BOSTON MA 02215 1 0 0 0 0 Common Stock 2023-03-19 4 A 0 10000 0.00 A 10000 D Stock Options (right to buy) 3.34 2023-03-19 4 A 0 10000 0.00 A 2033-03-18 Common Stock 10000 10000 D Consists of shares of the Issuer's common stock issuable under 10,000 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of the Issuer's common stock upon vesting. The RSUs are scheduled to vest in equal annual installments until the third anniversary of the grant date, subject to the reporting person's continued service. Includes 10,000 unvested RSUs. Each unvested RSU represents the right to receive one share of the Issuer's common stock upon vesting. The option was granted on March 19, 2023. The shares underlying the option vest in equal monthly installments until the third anniversary of the grant date, subject to the reporting person's continued service. /s/ Jeffrey Schulz, Attorney-in-Fact 2023-03-21