Journal ArticleDOI
Defining a vibrotactile toolkit for digital musical instruments: characterizing voice coil actuators, effects of loading, and equalization of the frequency response
TLDR
This paper evaluates cost-effective and portable solutions allowing for independent control of frequency and amplitude over a wide frequency bandwidth and low harmonic distortion, so that flexible and high-quality vibrotactile feedback can be displayed and compares the result of equalization by performing sinesweep measurements on the implementation.Abstract:
The integration of vibrotactile feedback in digital music instruments (DMIs) is thought to improve the instrument’s response and make it more suitable for expert musical interactions. However, given the extreme requirements of musical performances, there is a need for solutions allowing for independent control of frequency and amplitude over a wide frequency bandwidth (40–1000 Hz) and low harmonic distortion, so that flexible and high-quality vibrotactile feedback can be displayed. In this paper, we evaluate cost-effective and portable solutions that meet these requirements. We first measure the magnitude–frequency and harmonic distortion characteristics of two vibrotactile actuators, where the harmonic distortion is quantified in the form of total harmonic distortion (THD). The magnitude–frequency and THD characteristics in two unloaded cases (actuator suspended freely or placed on a sandbag) are observed to be largely identical, with minor attenuation for actuators placed on the sandbag. Loading the actuator (when placed in a DMI) brings resonant features to its magnitude–frequency characteristics, increasing the output THD and imposing a dampening effect. To equalize the system’s frequency response, an autoregressive method that automatically estimates minimum-phase filter parameters is introduced, which by design, remains stable upon inversion A practical use of this method is demonstrated by implementing vibrotactile feedback in the poly vinyl chloride chassis of an unfinished DMI, the t-Stick. We finally compare the result of equalization by performing sinesweep measurements on the implementation and discuss the degree of equalization achieved using it.read more
Citations
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Proceedings Article
Proceedings of the International Conference on New Interfaces for Musical Expression
Alexander Refsum Jensenius,Ståle Andreas van Dorp Skogstad,Kristian Nymoen,Anders Tveit,Rolf Inge Godøy,Daniel Overholt +5 more
Proceedings ArticleDOI
VHP: Vibrotactile Haptics Platform for On-body Applications
TL;DR: VHP as mentioned in this paper is a wearable wearable haptics platform that includes a low-power miniature electronics board that can drive up to 12 independent channels of haptic signals with arbitrary waveforms at a 2-kHz sampling rate.
Journal ArticleDOI
Music Score Recognition Method Based on Deep Learning
TL;DR: The improved deep learning algorithm is applied to the research of music score recognition and provides data support for constructing knowledge graph in music field and indicates that deep learning has great research value in music retrieval field.
Autoregressive Parameter Estimation for Equalizing Vibrotactile Systems
TL;DR: An autoregressive method is proposed that automatically estimates minimum- phase filter parameters, which by design, remain stable upon inver- sion and the degree of equalization achieved is discussed.
Journal ArticleDOI
Adaptive Equalization of Vibrotactile Actuators
TL;DR: A novel adaptive filter based on Volterra and bilinear filter models that is nonlinear and more robust than previous approaches is introduced that is able to consistently outperform existing adaptive filter models and equalize vibrotactile actuators efficiently.
References
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