Investigation of Sound Absorption Characteristics of Textile Materials Produced from Recycled Fibers

Abstract

Excessive sound causes growing public well-being problems and significant environmental contamination in our daily life. Generally, most of the noise problems are difficult to be treated at source, and the reduction of noise emission is usually achieved through the use of noise isolation processes. In recent times, nonwovens as one of the most common textile products have become valuable sound absorption materials. These materials are used as sound absorbers, sound diffusers, noise barriers, and sound reflectors. For sustainable development of the textile industry, solutions for both decreasing waste and reducing noise have been searched for years. Due to the good sound absorbing properties, recycled materials are becoming an attractive option to traditional materials for practical purposes. In this study, the measurement methods of acoustic characteristics of textile materials are explained, and the sound absorption features of nonwoven fabrics made from both pure and recycled polyester and polypropylene fibers are compared.

Foam processability of polypropylene/sisal fiber composites having near‐critical fiber length for acoustic absorption properties

“…Discs of 30 mm diameter and 4 mm thickness were used as test specimens. Analyzing the sound absorption coefficient value at different frequencies is complex, hence NRC was calculated and reported as a single value, in accordance with literature 27,28 …”

“…Subsequently, the pressure is measured at two places near the sample. The relative pressure of the incident and reflected wave is related to the value of reflection factor and the sound absorption coefficient ( α ) of the sample 27 …”

Investigation of sound transmission loss of natural fiber/rubber crumbs composite panels

“…The post-consumer textile waste is suitable to produce commercially feasible sustainable products for acoustic insulation by using nonwoven fabrication techniques in the form of loose fibers, nonwoven fabric, and compostable thermoplastic binder fibers as the insulation materials. 1,[13][14][15] The acoustic absorptivity of nonwoven samples at low, mid, and high frequencies is improved by increasing the thickness of the tested samples, which increases the friction losses. The energy losses elevate with the adding of the air spaces behind the sample at mid and high frequencies.…”

Improving the repetitive washing and abrasion resistance properties of fabrics produced with metallized yarns

“…The wear resistance of all fabrics produced within the scope of the study was measured according to the TS EN ISO 12947-2 standard using a Martindale abrasion tester [31]. The formation of the first yarn break or hole of the fabric sample was tested in the preliminary trials.…”