Low-frequency noise control is always a challenging issue for an NVH (Noise, Vibration and Harshness) engineer. Acoustic metamaterials are a newly invented class of materials that exploit interesting wave phenomena to control and manipulate sound waves beyond the capability of naturally occurring materials. They are finding increasing use in the field of low-frequency noise control, acoustic super lensing, wave guiding, frequency filtering, and acoustic subwavelength imaging. Space coiling metamaterials and sonic crystals are among the most widely used metamaterials for noise control. They display interesting wave manipulations that lead to extraordinary phenomena such as extreme positive, negative, or zero values of refractive index, wave speed and bulk elastic properties, Fabry-Perot type resonances, spectral band gap formation, local resonances, and Bragg’s scattering. Advancements are ongoing to improve their performance and reduce their limitations. This chapter describes these acoustic metamaterials, particularly, in the context of noise control.