Rotor noise is a significant noise source in many applications like aircraft propellers, wind turbines, and everyday household applications like fans and compressors used in refrigerators. Furthermore, with the growing usage of drones and mini aircraft for multiple applications, the noise levels are also coming under scrutiny and are subject to tighter rules and regulations. In this work, we tried to address the problem by studying the effects of serrations on rotor blades. A detailed experimental study is conducted to observe the effect of various parameters like wavelength, depth of serrations, and pitch angle on serrated blades' acoustic emissions at low speeds from 500 to 2000 rpm. Experiments are conducted on flat blade rotors with sinusoidal serrations on the trailing and leading edges with different amplitudes and wavelengths. A total of 7 blades with different serration configurations, including a base configuration, are studied. Five of them have serrations throughout the span of the blade. Effect of serrations on tonal noise and high frequencies is studied, it is observed that trailing edge serrations result in tonal noise reduction up to 3.5 dB and overall SPL reduction of 2.8 dB. Some of the serration configurations reduce very little noise to none. Leading-edge serrations are more effective in reducing noise levels of rotor compared to trailing edge serrations. Overall noise level reductions up to 5dB and broadband noise reduction up to 6dB are observed. One novel serration configuration with serrations of varying amplitude is designed and tested. It is found to be effective in both trailing edge and leading edge serration configurations.