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Patent Searching and Data


Title:
SPEAKER
Document Type and Number:
WIPO Patent Application WO/2016/194857
Kind Code:
A1
Abstract:
A speaker comprising a metal plate and a piezoelectric element bonded together is provided which has a low distortion factor of outputted sound. This speaker is characterized in that, defining the longitudinal elastic modulus E of the metal plate 1 as (kN/mm2) and the density ρ thereof as (g/cm3), and defining Sm as the surface area of the bonding surface of the metal plate 1 where said metal plate and the piezoelectric element were bonded, and Sp as the surface area of the piezoelectric element 2, then, when X is defined as X = (Sp/Sm) * (ρ/E), the value of X is 0.01-0.08. By adjusting the area ratio of the metal plate and the piezoelectric element, a low distortion factor is achieved. It was verified that when the value of X is 0.01-0.08, the distortion factor was 2% or less.

Inventors:
HOSAKA AKIHIKO (JP)
WATANABE YOSHIYUKI (JP)
Application Number:
JP2016/065842
Publication Date:
December 08, 2016
Filing Date:
May 29, 2016
Export Citation:
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Assignee:
O2AID INC (?3700862, JP)
International Classes:
H04R17/00
Foreign References:
JP2001339793A2001-12-07
JP5012512B22012-08-29
Attorney, Agent or Firm:
KANEKO, Hiroshi (2F Nishi-shinjuku GF Building, 8-3-1 Nishi-shinjuk, Shinjuku-ku Tokyo 23, 〒1600023, JP)
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