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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Journal of the Acoustical Society of Korea
Journal Basic Information
Journal DOI :
The Acoustical Society of Korea
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Volume & Issues
Volume 26, Issue 8 - Nov 2007
Volume 26, Issue 7 - Oct 2007
Volume 26, Issue 6 - Aug 2007
Volume 26, Issue 5 - Jul 2007
Volume 26, Issue 4 - May 2007
Volume 26, Issue 3 - Apr 2007
Volume 26, Issue 2 - Feb 2007
Volume 26, Issue 1 - Jan 2007
Selecting the target year
A Study on the Intelligibility of Esophageal Speech
Pyo, Hwa-Young ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 182~187
The present study was to investigate the speech intelligibility of esophageal speech, which is the way that the laryngectomized people who lost their voices by total laryngectomy can phonate by using the airstream driven into esophagus, not trachea. Three normal listeners transcribed the CVVand VCV syllables produced by 10 esophageal speakers. As a result, overall intelligibility of esophageal speech was 27%. Affricates showed the highest intelligibility, and fricatives, the lowest. In the aspect of the place of articulation, palatals were the most intelligble, and alveolars, the least. Most of the aspirated consonants showed a low intelligibility. The consonants in VCV syllables were more intelligible than the ones in CVV syllables. The low intelligibility of esophageal speakers is due to insufficient airflow intake into esophagus. Therefore, training to increase airflow intake, as well as correct articulation training, will improve their low intelligibility.
Design of an S/PDIF 7.1-Channel Digital Amplifier for Home Theater Speakers
Kwon, Oh-Kyun ; Song, Moon-Vin ; Jun, Kye-Suk ; Chung, Yun-Mo ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 188~193
In general, analog amplifiers for 5.1 or more channels have been used to configure home theater systems. In order to make high-performance systems, it is desirable to process audio signals in digital techniques in consideration of output and efficiency of speakers. Especially we need 7.1-channel system to separate audio signals efficiently. In this paper we implemented the architecture of S/PDIF 7.1-channel digital amplifier for home theater systems. The amplifier shows good performance with less loss of original sounds because of both strong characteristics against noises and direct processing of input data.
Discriminative Weight Training for a Statistical Model-Based Voice Activity Detection
Kang, Sang-Ick ; Jo, Q-Haing ; Park, Seung-Seop ; Chang, Joon-Hyuk ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 194~198
In this paper, we apply a discriminative weight training to a statistical model-based voice activity detection(VAD). In our approach, the VAD decision rule is expressed as the geometric mean of optimally weighted likelihood ratios(LRs) based on a minimum classification error(MCE) method which is different from the previous works in that different weights are assigned to each frequency bin which is considered more realistic. According to the experimental results, the proposed approach is found to be effective for the statistical model-based VAD using the LR test.
Speaker Identification with Estimating the Number of Cluster Based on Boundary Subtractive Clustering
Lee, Youn-Jeong ; Choi, Min-Jung ; Seo, Chang-Woo ; Hahn, Hern-Soo ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 199~206
In this paper we propose a new clustering algorithm that performs clustering the feature vectors for the speaker identification. Unlike typical clustering approaches, the proposed method performs the clustering without the initial guesses of locations of the cluster centers and a priori information about the number of clusters. Cluster centers are obtained incrementally by adding one cluster center at a time through the boundary subtractive clustering algorithm. The number of clusters is obtained from investigating the mutual relationship between clusters. The experimental results for artificial datum and TIMIT DB show the effectiveness of the proposed algorithm as compared with the conventional methods.
Speech/Music Discrimination Using Spectrum Analysis and Neural Network
Keum, Ji-Soo ; Lim, Sung-Kil ; Lee, Hyon-Soo ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 207~213
In this research, we propose an efficient Speech/Music discrimination method that uses spectrum analysis and neural network. The proposed method extracts the duration feature parameter(MSDF) from a spectral peak track by analyzing the spectrum, and it was used as a feature for Speech/Music discriminator combined with the MFSC. The neural network was used as a Speech/Music discriminator, and we have reformed various experiments to evaluate the proposed method according to the training pattern selection, size and neural network architecture. From the results of Speech/Music discrimination, we found performance improvement and stability according to the training pattern selection and model composition in comparison to previous method. The MSDF and MFSC are used as a feature parameter which is over 50 seconds of training pattern, a discrimination rate of 94.97% for speech and 92.38% for music. Finally, we have achieved performance improvement 1.25% for speech and 1.69% for music compares to the use of MFSC.
A Fast IFFT Algorithm for IMDCT of AAC Decoder
Chi, Hua-Jun ; Kim, Tae-Hoon ; Park, Ju-Sung ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 214~219
This paper proposes a new IFFT(Inverse Fast Fourier Transform) algorithm, which is proper for IMDCT(Inverse Modified Discrete Cosine Transform) of MPEG-2 AAC(Advanced Audio Coding) decoder. The
(N-point) type IMDCT is the most powerful among many IMDCT algorithms, however it includes IFFT that requires many calculation cycles. The IFFT used in
(N-point) type IMDCT employ the bit-reverse data arrangement of inputs and N/4-point complex IFFT to reduce the calculation cycles. We devised a new data arrangement method of IFFT input and
-type IFFT and thus we can reduce multiplication cycles, addition cycles, and ROM size.
A Study on Propeller Noise Localizations in a Cavitation Tunnel Using MFP
Park, Cheol-Soo ; Cho, Yong-Jin ; Seol, Han-Shin ;
The Journal of the Acoustical Society of Korea, volume 26, issue 5, 2007, Pages 220~226
The two major objectives of acoustical measurements in a cavitation tunnel are measuring the noise levels generated by rotating propellers behind a hull and localizing possible noise sources in order to reduce noise levels. Propeller noise measurement experiments were performed in MOERI cavitation tunnel at December, 2006. In order to put the propeller into cavitating conditions, a wake-generating dummy body was devised. In addition, ten hydrophones are put inside a wing-shaped casing in order to minimize the unexpected flow induced self noise around hydrophone itself. After measuring both of the noises of the rotating propeller behind the dummy body and signals generated by a virtual source, respectively the data were matched field processed using the frequency incoherent Bartlett processor to localize noises on the propeller plane. In this paper, we presented the measured noise analysis and the localization results.