Masahiro Sunohara

  • Citations Per Year
Learn More
A drumlike traditional Japanese instrument, the mokugyo, is experimentally discussed. First, the acoustic characteristics of 176 mokugyos with diameters ranging from 7.5 to 120 cm and three drumsticks were measured. Results show that (a) the sound spectra consist of two common peaks [F1 (Hz): first peak frequency, F2 (Hz): second peak frequency] close(More)
In this paper, we present a low-latency scheme for real-time blind source separation (BSS) based on online auxiliary-function-based independent vector analysis (AuxIVA). In many real-time audio applications, especially hearing aids, low latency is highly desirable. Conventional frequency-domain BSS methods suffer from a delay caused by frame analysis. To(More)
A double-knife-edge method for focusing error detection has been integrated into one molded-glass optical element (MGOE). The first surface of the MGOE consists of two parts, a slant plane and a sphere; the second surface is an asphere; Groove cross noise caused by a geometrical aberration of the MGOE is simulated. When the second surface is at sphere,(More)
Many of hearing aid users have complained about discomfort of their own voice and/or the mastication sound. Such discomfort is caused by increased sound pressure at low frequencies when the ear canal is blocked by hearing aid itself. This phenomenon is called "occlusion effect" and is one of the critical issues for hearing aids. This report proposes an(More)
Specimens of bave (undegummed silk thread) were collected from cocoons of various origins of parent silkworm races, such as Japanese, Chinese, European, Korean and tropical origins, and from as many races as possible. An apparatus was set up to measure the dynamic elastic modulus of these specimens. In all the categories of the races tested, the elastic(More)
Howling is a very annoying problem to hearing aid users because it restricts the maximum gain of a desired signal to the hearing aid users. In general, howling can be eliminated by using an adaptive feedback canceller which estimates the feedback path from the loudspeaker to the microphone equiped in the hearing aid. When the desired signal is a correlation(More)
  • 1