Recently, broadband analog network coding (ANC) has intensively been studied due to its potential to increase the network capacity by exploiting the broadcasting nature of the wireless channel. However, channel state information (CSI) knowledge is required for self-information removal and signal detection. A low-complexity pilot-assisted channel estimation (PACE) scheme has been presented for b...

In real active noise control (ANC) applications, the following situations frequently occur, one is that disturbances only present at the error sensor and have low correlation with reference signal, the other is that there is no enough space or ideal position for locating the reference sensor to satisfy causality condition. Thus the residual noise after feedforward control can be seen as uncorre...

In active noise control (ANC) systems, there exists an inherent feedback from the loudspeaker to the primary microphone. Adjoint least mean square (ALMS) algorithm is known to be an alternative to the widely used filtered x LMS (FxLMS) for reducing the computational complexity and memory requirements, especially in the case of multi-channel systems. Further FxLMS algorithm is based on the assum...

Broadband analog network coding (ANC) has been recently introduced to further increase the network capacity by exploiting the broadcasting nature of the wireless channel. However, channel state information (CSI) knowledge is required for self-information removal and signal detection. Recently, a pilot-assisted channel estimation (PACE) scheme has been presented for broadband ANC; however, feedb...

Existing noise reduction techniques for open-fitting hearing aids typically disregard the occurrence of signal leakage through the openfitting, leading to a degraded noise reduction performance. Recent miniaturization advances enable to incorporate an internal microphone in the ear mould, which is able to record this signal leakage. Recently, feedforward and combined feedforward-feedback active...

Headphones with feedback Active Noise Control (ANC) have some advantages over feedforward applications [1], but suffer from the risk of instabilities. A block diagram of a typical digital feedback ANC headphone (compare [1], [2]) is shown in Fig. 1. The performance and stability of this system depends on the modelling accuracy of the secondary path (i.e. the transfer function from the loudspeak...

In this paper, an adaptive feedback control algorithm for ANC (Active Noise Control) with leaky FeLMS (Filtered-error Least Mean Square) algorithm is proposed. A shaping function is used in the updating equation, which selects the frequency band of the noise attenuation for the ANC system. Compared with the adaptive feedback ANC structure based on traditional FxLMS (Filtered-x Least Mean Square...

objective: to find out the quality of anc in the upazila health complexes (phc centres) of bangladesh. materials and methods: this cross sectional study was done in purposively selected three upazilas among the clients receiving antenatal care (anc). data were collected with questionnaire cum checklist in the context of two aspects of quality issues, namely assessment of physical arrangements f...

We propose an active noise control (ANC) system for reducing periodic noise generated in a high field area such as noise generated from magnetic resonance imaging (MRI) devices (MR noise). The proposed ANC system utilizes optical microphones and piezoelectric loudspeakers, because specific acoustic equipment is required to overcome the high-field problem, and consists of a head-mounted structur...