SU1434565A1 - Diffuser of speaker head - Google Patents

Abstract

The invention relates to electroacoustics and can be used in the manufacture of high-quality loudspeaker heads. The invention eliminates parametric oscillations and improves the quality of sound transmission due to the fact that in the conical part of the diffuser (D) the corrugations are wound in a spiral, the flexibility of which decreases to the apex of the cone D logarithmically. When operating at low frequencies, D oscillates like a piston, and as frequency increases, some of the corrugations lose stability. Thus, as the frequency increases, a smooth decrease in the oscillating mass occurs, 2 Il.

Description

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The invention relates to electro-acoustics and can be used in the manufacture of high-quality loudspeakers.

The purpose of the invention is to improve the quality of sound transmission by eliminating parametric oscillations of the diffuser.

FIG. 1 shows the device according to FIG. 2 - transverse, sections of the corrugation at the base of the suspension (a and neck) (b).

The device contains a tapered part 1, the suspension 2 and the neck 3, filled as one piece of paper pulp. On the tapered part 1, corrugations are made in the form of spirals 4 and 5, evenly spaced around and having a variable cross-section corresponding to a decrease in flexibility from suspension 2 to neck 3 according to a logarithmic relationship. Spirals can be performed, for example, by Archimedes. Dp reduce flexo corrugation

to the neck, the corrugation width is chosen by b / b, the corrugation depth is h if the radius of curvature is y / g, TonupiHa S iS (figure 2).

The device works as follows.

When the head is excited, the cone part of the diffuser 1 at different frequencies

3

it oscillates differently, namely at low frequencies, the diffuser oscillates like a piston, and as the frequency increases, a part of the corrugations 4 and 5 with less rigidity loses stability and their outer surface ceases to oscillate. Thus, oscillating from the mass of the diffuser decreases with increasing frequency, which creates conditions for better reproduction of high frequencies. The logarithmic law of variation in the corrugations ensures uniform sound transmission over a wide

frequency range.

Claims (1)

Invention Formula The loudspeaker head diffuser, containing a suspension and a corrugated cone part with a neck, characterized in that, in order to improve the quality of sound transmission by eliminating parametric oscillations, the corrugations on the tapered part are made in the form of spirals arranged evenly around the circumference and having a variable cross section, corresponding to the possibility of reducing flexibility from the suspension to the neck according to the logarithmic law. tf Cpus one Shig.g