A single loudspeaker has weak sound absorption due to its excessive acoustic resistance
and abrupt acoustic reactance when used for large area noise control. In this paper, a SLPP …

With the effective couplings between the perforated plates and the shunt loudspeaker, a
hybrid absorber of shunt loudspeaker and perforated plates (HSLPP) with multiple …

Broadband adjustable sound absorbers are desired for controlling the acoustic conditions
within enclosed spaces. Existing studies on acoustic absorbers, either passive or active, aim …

Controlling low-frequency noise propagated by power transformers in urban and industrial
areas poses a technical challenge in the design of sound absorbers. Although existing …

To investigate the sound absorption of the absorber composed of a shunt loudspeaker (SL)
and porous materials (PM) in tandem, the normal absorption coefficients for six samples of …

This study investigates the sound insulation capabilities of two electromagnetic induction
membranes controlled by shunt circuits in the duct sound field. The real and imaginary parts …

The shunted loudspeaker with a negative impedance converter is a physical system with
multiple influencing parameters. In this paper, a fully exhaustive backtracking algorithm was …

Transformer noise is dominated by low frequency components, which are hard to be
controlled with traditional noise control approaches. The shunt loudspeaker consisting of a …

Low frequency noise is the primary frequency range that affects individuals' physical and
emotional well-being. The impact of conventional low-frequency sound absorption …

A compact multi-layered structure is proposed based on the coiled-up space concept for
power transformer noise absorption at 100 and 200 Hz. Current methods of constructing …