144th AES CONVENTION Poster Session P17: Posters: Analysis/Synthesis

AES Milan 2018
Poster Session P17

P17 - Posters: Analysis/Synthesis

Friday, May 25, 09:30 — 11:00 (Arena 2)

P17-1 A Preliminary Study of Sounds Emitted by Honey Bees in a BeehiveStefania Cecchi, Universitá Politecnica della Marche - Ancona, Italy; Alessandro Terenzi, Universita Politecnica delle Marche - Ancona, Italy; Simone Orcioni, Universita Politecnica delle Marche - Ancona, Italy; Paola Riolo, Universita Politecnica delle Marche - Ancona, Italy; Sara Ruschioni, Universita Politecnica delle Marche - Ancona, Italy; Nunzio Isidoro, Universita Politecnica delle Marche - Ancona, Italy
Honey bees (Apis mellifera L.) are well known insects that have positive effects on a human being’s life. They are so important that the honey bee colonies decline of the last years has produced an increasing interest for their safeguard. In this context, the proposed work aims at studying and developing an innovative system capable of monitoring the beehive’s condition exploiting the sound emitted by the beehives in combination with measurable parameters such as temperature, humidity, CO2, hive weight, and weather conditions. In this paper preliminary results will be reported describing the developed platform and the first results obtained in a real scenario.
Convention Paper 9981 (Purchase now)

P17-2 Analysis of Reports and Crackling Sounds with Associated Magnetic Field Disturbances Recorded during a Geomagnetic Storm on March 7, 2012 in Southern FinlandUnto K. Laine, Aalto University - Aalto, Finland
Audio- and magnetic field signals were recorded during a geomagnetic storm on March 7, 2012, on open fields at Karkkila, approximately 70 km north of Helsinki by using a Zoom H4n recorder. Almost 90 distinct sound events like short claps, loud reports, or even a crackling sound were recorded. The paper describes the methods used and the results obtained in the audio- and magnetic field signal analysis. Relationship between the instances of the sound events and the geomagnetic activity is described. It is shown that the spectral properties of the crackling sound and the reports are similar. The challenges in finding connections between individual sounds and the corresponding magnetic field fluctuations are demonstrated and discussed.
Convention Paper 9982 (Purchase now)

P17-3 Harmonics and Intermodulation Distortion Analysis of the Even-Order Nonlinearity Controlled Effector PedalMasaki Inui, Hiroshima Institute of Technology - Hiroshima, Japan; Kanako Takemoto, Hiroshima Institute of Technology - Hiroshima, Japan; Toshihiko Hamasaki, Hiroshima Institute of Technology - Hiroshima, Japan
It is well known that components of an electric guitar system contain even-harmonics properties inherently, such as vacuum tubes or Fuzz pedal feedback circuits. Furthermore, there are several popular pedals in the "Overdrive" category and the difference in timbers attributes to even-harmonics. However, it is difficult to identify the correlation between transfer characteristics and auditory nuances, which seems to involve psychoacoustic factors such as masking effect. In this study we developed a novel pedal that can continuously control the strength of even-harmonics and odd-harmonics, and clarified the high-order distortion effects from spectrum analysis of intermodulation distortion taking Loudness K-weighted full scale (LKFS) correction. This effector pedal must be a powerful tool for perceptual distortion analysis by using real instrument signal where masking effect occurs.
Convention Paper 9983 (Purchase now)

P17-4 Bandwidth Extension with Auditory Filters and Block-Adaptive AnalysisSunil G. Bharitkar, HP Labs., Inc. - San Francisco, CA, USA; Timothy Mauer, HP, Inc. - Vancouver, WA, USA; Charles Oppenheimer, HP, Inc. - San Francisco, CA, USA; Teresa Wells, HP, Inc. - San Francisco, CA, USA; David Berfanger, HP, Inc. - Vancouver, WA, USA
Bandwidth limits incurred by an audio signal due to low-excursion and narrow-bandwidth speakers reduces the perception of bass. A method to overcome this is to synthesize the harmonics of the fundamental frequency using side-chain processing. Depending on the input signal, intermodulation distortion could be introduced resulting in artifacts. A recent approach selects relevant portions of the low-frequency signal for reproduction using perceptually motivated filters, resulting in cleaner bass reproduction as confirmed through listening tests. However, one of the limitations is the need for large-duration frames or blocks (e.g., 5296 samples/block at 48 kHz) to obtain adequate frequency resolution at low-frequencies. In this paper we present an alternative approach that scales well in performance with respect to smaller block-sizes using 1/6-octave filterbank and power analysis.
Convention Paper 9984 (Purchase now)

P17-5 Evaluating Similarity of Temporal Amplitude Envelopes of Violin SoundsMagdalena Dziecielska, Poznan University of Technology - Poznan, Poland; Krzysztof Martyn, Poznan University of Technology - Poznan, Poland; Ewa Lukasik, Poznan University of Technology - Poznan, Poland
The paper presents a method for evaluating similarity of temporal amplitude envelope of violin sounds. The experienced violinmakers are able to separate good sounding from bad sounding violins just by regarding the envelope of individual sounds. The contours of two-sided envelopes of individual open-string sounds are considered as images. Four uncorrelated visual descriptors are used to form a feature vector characterizing image shape. Individual distance measures are selected for each feature. The similar objects are grouped using k-means method. Violin sounds from AMATI database have been used in experiments.
Convention Paper 9985 (Purchase now)

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