| PAPERS | |
| Frequency-Zooming ARMA Modeling of Resonant and Reverberant Systems (PDF-549K) | |
| Matti Karjalainen, Paulo A. A. Esquef, Poju Antsalo, Aki Mäkivirta, and Vesa Välimäki | 1012 |
| Complex linear, time-invariant modeling of a system with high modal density is extremely difficult, for example, room reverberation. A frequency-zooming method based on an extension of previous techniques is explored for high-resolution modeling of systems with many poles and zeros. Such models can be used not only to generate accurate time responses, but also to serve as the basis for inverse filtering and equalization. | |
| Passive All-Pass Crossover System of Order 3 (Low Pass) + 5 (High Pass), Incorporating Driver Parameters (PDF-202K) | |
| Neville Thiele | 1030 |
| A third-order low-pass channel combined with a fifth-order high-pass channel can be designed to produce an overall all-pass crossover between the two channels. Because the two channels are approximately in phase over the crossover region, the approach is more tolerant to variations in driver parameters and physical offsets in the cabinet. Although the approach adds a modest cost, the benefits appear to justify the incremental complexity. | |
| Experimental Evidence of Cooperation Phenomena Application to a Loudspeaker with Rub (PDF-159K) | |
| Fernando Bolaños | 1039 |
| Unlike a linear system, which preserves the frequency integrity of each signal component, a nonlinear system can shift energy from one spectral component to another. Although the theoretical basis of energy cooperation is well known, the author empirically demonstrates the phenomena in an electroacoustic experiment involving a voice coil with friction. When random noise is added to a sine wave, the nonlinear process moves energy from the noise to the sine frequency. This is analogous to the way that a limit-cycle oscillator converts the dc of the power supply into a spectral component. | |
| ENGINEERING REPORTS | |
| Iterative Combinatorial Basis Spectra in Wavetable Matching (PDF-327K) | |
| Alan Ng and Andrew Horner | 1054 |
| As an alternative to the combinatorial approach to wavetable synthesis, an iterative method is proposed to increase the computational efficiency while achieving a comparable effectiveness. The algorithm was evaluated using tones from the trumpet, tenor voice, and Chinese pipa (a plucked stringed instrument). The number of wavetables dramatically influenced the rms error. In addition, subjective listening tests determined the degree to which the synthesized signal was equivalent to the original. | |
| STANDARDS AND INFORMATION DOCUMENTS | |
| AES Standards Committee News (PDF-1.5M) | 1064 |
| Calls for Comment: MADI revision, life expectancy of CD-ROM; Internet audio; audio metadata | |
| FEATURES | |
| Moving Digital Audio, Part 1 (PDF-239K) | 1068 |
| 2002/2003 AES International Sections Directory (PDF-254K) | 1076 |
| Education News (PDF-97K) | 1106 |
| Call for Nominations for Board of Governors (PDF-11K) | 1113 |
| Call for Awards Nominations (PDF-11K) | 1114 |
| 11th Tokyo Regional Convention, Call for Papers (PDF-24K) | 1124 |
| 115th Convention, New York, Call for Papers (PDF-11K) | 1125 |
| 114th Convention, Amsterdam, Call for Workshops Participants (PDF-31K) | 1126 |
| Bylaws: Audio Engineering Society, Inc. (PDF-19K) | 1127 |
| Index to Volume 50 (PDF-41K) | 1132 |
| DEPARTMENTS | |
| News of the Sections (PDF-135K) | 1101 |
| Sound Track (PDF-35K) | 1108 |
| New Products and Developments (PDF-48K) | 1109 |
| Upcoming Meetings (PDF-24K) | 1110 |
| Available Literature (PDF-14K) | 1111 |
| AES Annual Report (PDF-12K) | 1115 |
| Membership Information (PDF-149K) | 1116 |
| Advertiser Internet Directory (PDF-39K) | 1119 |
| In Memoriam (PDF-92K) | 1120 |
| AES Conventions and Conferences (PDF-35K) | 1144 |
| EXTRAS | |
| Cover & Sustaining Members List (PDF-26K) | |
| VIP List & Editorial Staff (PDF-26K) | |
| Ads In This Issue (HTML) | |
| Download Entire Journal As One PDF (PDF-4.6MB) | |
