ACTIVE HEADSET FOR ENHANCED SPEECH INTELLIGIBILITY IN INTERCOM SYSTEMS

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Sven Johansson, Mathias Winberg, Per Sjösten, Ingvar Claesson
Title: ACTIVE HEADSET FOR ENHANCED SPEECH INTELLIGIBILITY IN INTERCOM SYSTEMS
Conference name: 3rd International Conference on Information, Communications, and Signal Processing (ICICS)
Year: 2001
Pagination: Paper No 0589
City: Singapore
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: sven.johansson@bth.se
Language: English
Abstract: Low frequency noise has a masking effect on speech, which significantly reduces the speech intelligibility. Usually, in order to
overcome the masking effect the sound level of the communication signal is increased. Exposure to the communication system then
causes hearing damage. A feasible approach is to reduce the low frequency noise by using active techniques combined with a method for reducing the noise in the intercom microphone signal. In order to achieve an efficient low frequency noise attenuation inside the headset an active hybrid headset is proposed, and in order to suppress the background noise in speech signals spectral subtraction is used.
Improved low frequency noise attenuation enables lower communication levels and reduces the risk for hearing damage.
Subject: Signal Processing\Active Noise and Vibration Control
Keywords: headset, active noise control, speech enhancement, spektral subtraction, intercom systems
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