| PAPERS | |
| A Robust and Computationally Efficient Speech/Music Discriminator (PDF-594KB) (HI-RES PDF-10.4MB) | |
| Jayme Garcia Arnal Barbedo and Amauri Lopes | 571 |
| Discriminating between speech and music is critical in such applications as speech recognition and automatic music transcription. A new method for achieving discrimination, which is computationally simple, attains almost perfect performance on a wide range of samples. The strategy uses four features extracted from frame histograms: zero-crossing rate, spectral rolloff, perceived loudness, and fundamental frequencies. Modest latency allows the strategy to be used in real-time applications. | |
| Vibrations of Loudspeaker Cones in the Transitional Range (PDF-473KB) (HI-RES PDF-6.4MB) | |
| Zhi-Liang Zhang and Chang-Jun Cheng | 589 |
| Loudspeaker diaphragm vibrations are analyzed in the transitional frequency region where bending waves are beginning to play a significant role in relation to the longitudinal motion. An analytic and numeric analysis shows that the two types of motion are highly coupled. The first nonbending frequency can be considered to be the upper limit of the loudspeaker's frequency response. | |
| Real-Time Processing of Image Sources Using Binary Space Partitioning (PDF-453KB) (HI-RES PDF-3.8MB) | |
| Dirk Schr��der and Tobias Lentz | 604 |
| Unlike the acoustic simulation of virtual spaces for static environments, with fixed source and listener locations, interactive virtual reality requires the aural experience to match a dynamically changing visual scene. Rapid computations are therefore more important than detailed acoustic modeling of a space. In the approach the geometry of a scene is subdivided into small subdivisions and pre-encoded in optimized data structures, BSP trees, with image source data. | |
| ENGINEERING REPORTS | |
| Cumulative Spectral Analysis for Transient Decaying Signals in a Transmission System Including a Feedback Loop (PDF-652KB) (HI-RES PDF-19.0MB) | |
| Yoshinori Takahashi, Mikio Tohyama, and Yoshio Yamasaki | 620 |
| Determining the principle resonant frequency of a public address system before the beginning of howling is a valuable tool. By introducing a spectral accumulation function into the previously known technique of cumulative spectral analysis (used with loudspeakers), potential resonant frequencies are more clearly revealed even when they are only barely audible. When applied to the decaying portion of a speech signal, the display clearly predicts the principle resonance. Effectively, the technique increases the order of resonant poles. | |
| STANDARDS AND INFORMATION DOCUMENTS | |
| AES Standards Committee News (PDF-167KB) | 630 |
| True peak metering; digital interface for microphones; ATM network over Ethernet; IEEE 1394 use cases; digital audio measurements; digital audio input-output interfaces; audio-file transfer and exchange; transfer technologies | |
| FEATURES | |
| 120th Convention Report, Paris (PDF-6.1MB) | 642 |
| Exhibitors (PDF-309KB) | 660 |
| Program (PDF-1.0MB) | 663 |
| 121st Convention Preview, San Francisco (PDF-286KB) | 742 |
| Exhibit Previews (PDF-965KB) | 744 |
| Digital Radio Broadcasting (PDF-196KB) (HI-RES PDF-361KB) | 771 |
| DEPARTMENTS | |
| Reviews of Acoustical Patents (PDF-1003KB) | 636 |
| News of the Sections (PDF-226KB) | 775 |
| Sound Track (PDF-130KB) | 781 |
| Available Literature (PDF-130KB) | 782 |
| Upcoming Meetings (PDF-117KB) | 784 |
| Membership Information (PDF-158KB) | 785 |
| Advertiser Internet Directory (PDF-161KB) | 787 |
| Sections Contacts Directory (PDF-193KB) | 792 |
| AES Conventions and Conferences (PDF-228KB) | 800 |
| EXTRAS | |
| Cover & Sustaining Members List (PDF-85KB) | |
| AES Officers, Committees, Offices & Journal Staff (PDF-152KB) | |
| Insert: 120th Convention Papers Order Form (PDF-119KB) | |
