Mycelium is a biological material that consists of filamentous fungi, forming intricate networks of hyphal micro-filaments that naturally bind organic matter. This unique way of growing offers promising potential for developing innovative materials, including acoustic absorbers. A lot of variety is possible, since mycomaterial properties are highly dependent on the substrate used. The presented research reports on the development and acoustic characterization of mycelium composites derived from diverse substrates. These include the fungal strain Pleurotus Pulmonarius, combined with leaves and grass clippings with textile waste. 3 distinct material combinations were made. For each material combination, the density and porosity were obtained by the gas pycnometer method. The sound absorption of the samples was determined using an impedance tube, in compliance with the ISO-10534-2 standard, spanning frequencies from 200 Hz to 5000 Hz. The microstructure of the samples was characterized by Scanning electron microscopy (SEM). The mycomaterials exhibited sound absorption values exceeding 50% across frequencies ranging from 1500 Hz to 4000 Hz.