JPH0244495U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1a and b are explanatory diagrams of the configuration of an acoustic device according to an embodiment of this invention, Figure 2 is a frequency characteristic diagram of the sound pressure of the sound emitted from the acoustic apparatus of Figure 1, and Figure 3 a and b show a specific structural example of the air duct in FIG. FIG. 4b is an enlarged sectional view of the air duct opening of the device, and FIG. 4b is a front view of the rectifying fin portion of FIG. 4a. FIGS. Figure 6 is an explanatory diagram of the sound pressure characteristics of the speaker system in Figure 7;
FIG. 2 is an explanatory diagram of a configuration of a speaker system with a resonance port according to a prior application of this invention. 1: Cabinet (buckle), 1a: Air duct mounting surface (buckle surface), 2: Vibration plate, 4: Vibrator (speaker unit), 5a, 5a': Outer cylinder, 5b, 5b': Inner cylinder, 6: Air duct (opening pipe port), 6a, 6b: air duct opening, 6c
: Air duct middle part (direction regulating structure), 8: Rectifier fin, 30: Vibrator drive device, 31: Servo section.

Claims (1)

[Claims for Utility Model Registration] (1) In an acoustic device in which a vibrator is arranged in a Helmholtz resonator having an open pipe port, each of the open sound ports is formed in a double cylinder shape at both open end portions. What is claimed is: 1. An acoustic device having a structure in which an outer cylinder at one end is connected to an inner cylinder at the other end, and an inner cylinder at one end is connected to an outer cylinder at the other end in an intersecting manner. (2) The acoustic device according to claim 1, wherein the vibrator is driven by electrical servo so as to cancel out an atmospheric reaction from the resonator side when the resonator is driven.