SU463239A1 - Plastomass phone case - Google Patents

Description

(54) TELEPHONE PIPE WITH PLASTIC BODY

one

A telephone case with a plastic housing is known, in which the auditory and speech openings are made in removable covers of the auditory and speech bumps.

All handsets have a slightly curved handle. Therefore, depending on the radius of curvature, it is necessary to perform the auditory and speech shells in such a way that their planes form corners with the handle, which, in combination with the total selected length of the handset, improve the acoustic parameters, in particular, the relative attenuation of the transmission.

The purpose of the invention is to improve the acoustic characteristics, the frequency characteristics of the transmission curves for speech and hearing, reduce the acoustic feedback, improve the sound insulation, is achieved by the fact that the proposed tube with audio holes are located relative to the walls with speech holes, so that located in the plane passing through the wall with speech apertures is determined by the intersection of two arcs, and the radius of the first arc, having a center at the midpoint of the wall with speech apertures, is equal to between the middle points of the ears, the middle head, the radius of the second arc, the middle point of which coincides with the middle of the mouth of the middle head, is about 14% of the nerve radius, and the second point, located on the same line with the first, is determined by the intersection of the perpendicular, the middle head from the middle of the mouth, and the plane passing through the steppe with the auditory orifices.

The internal volumes of the auditory and speech parts are made in the form of Helmholtz resonators formed by the internal surfaces of the walls with auditory and speech apertures and one of the planes of the auditory and speech cansulas, and one of the Helmholtz resonator steiocs is made of metal ceramics, which is connected a speech capsule, the resistance height being 5-20 transverse sections of the cermet grains.

Both parts of the body have transverse ribs, and in the cross section of the telephone tube there is a circuit of the speech and hearing signals. Both parts of the body have a series of wedge joints. There are latches in the device. FIG. 1 shows in the form of a triangle the geometric ratio of the individual sizes of the “average head; in fig. 2 is a handset consisting of two halves, side view. FIG. 1 and 2 the following notation is accepted: 1,2 — mid points of the ears of the middle head; 3 — midpoint of the mouth of the middle head; 4 - wall with auditory holes; 5 - wall with speech holes; 6 - a plane passing through a wall with auditory orifices; 7 is a plane passing through a wall with speech apertures; 8, 9 — points defining the position of wall 5; 10-11 are the radii of the arcs defining the position of point 8; 12 - perpendicular p from point 3 to plane 6; 13 - speech capsule; 14 - rumor capsule; 15 is the middle point of the steppes 4; 16, 17 half body; 18, 19- transverse ribs; 20 - butt joint; 21 is a circuit for speech and aural signals; 22 - internal volume of the speech part; 23 - internal volume of the auditory part; 24 - acoustic impedance; 25-27 - wedge joints; 28-32 - constipation with snaps. Wall 4 with auditory holes coincides with a given plane of audible sound, which passes through the midpoint 1 of the curvature of the middle head. The continuation of the given plane 6 passing through the wall with the auditory orifices, together with the segments between points 1-3, forms a given angle. The extension of the wall 5 with the speech apertures, which coincides with the plane passing through the wall 4 with the auditory apertures, is determined by points 8 and 9. Point 8, which coincides with the midpoint of the membrane of the speech capsule, is defined as the intersection of two arcs, radius 10 one of which, going out from the midpoint 4 with the auditory orifices, is equal to the distance between the midpoints 1 and 2 of the gills of the middle head. The radius 11 of the second arc extending from the midpoint of the mouth 3 is about 14% of the radius 10. Point 9 is determined by the intersection of the perpendicular 12 from the midpoint 3 of the middle mouth to the plane 6 passing through the wall with the auditory orifices . The angle a, formed by planes 6 and 7, is about 125 °. The inner volume of the speech part 22 and the internal volume of the auditory part 23 between the speech 13 and the auditory 14 capsules and the corresponding walls 4 and 5 are made in the form of GelMholtz resonators. The wall of the Helmholtz resonator with a volume of 23, located opposite the internal surface of the wall with speech holes 5, is made in the form of acoustic impedance 24, mainly combined with a speech capsule 13. It is possible to have a similar resistance for the Helmholtz resonator with an internal volume of 23 speech part and an auditory capsule; 1st 14. Acoustic resistance 24 in the form of a plate, whose thickness is about 20 times larger than the diameter of the grains, consists of LS steel-ceramic with grains of the order of 0.1 m. Bronze, alloy of bronze and tin, stainless steel, ceramics, glass and other granular materials suitable for agglomeration should be used as material. In the asymmetric halves of the tube body, there are made transverse rims of Yu and 19, which, when connected to the halves of the hull, mutually overlap. The cross-sectional area of the telephone pipe is the same way that printed circuit board 21 can be used for disassembling the speech and auditory sigpals. Both 1 OLOBIP of the telephone tube housing are made so orazous that with the help of a series of wedge joints 2i) -2 / between the two halves there is a strong contact with the arcuate butt joint 20. There is almost the same shirif between the two halves of the I1 joint. For the purpose of securing the auditory capsule 14, the speech capsule 13 and the schematic 21 for unlocking the speech and auditory signals in one of the halves of the housing 16 I-are constipated with latches 2b-32. For hermetic ligands of the body of the tube, its 1Loops can be connected along the butt stitch 21) with glue or ultrasonic welding. In this case, the wedge joints 25-27 fix the mutual position of the halves of the body. Since the circuit for isolating speech and hearing signals is on the handle (not shown in the drawings, J, a two-wire connecting cord can be used to connect the handset.) Invention 1. A telephone handset with a plastic mass from two parts, in one of which there are walls with openings for auditory capsules and steeples with openings for speech capsules, characterized in that, in order to improve acoustic characteristics, steppes with auditory openings are located relative to walls with so that the point located in the plane passing through the wall with speech holes is determined by the intersection of two arcs, and the radius of the first arc, which has a center at the middle point of the wall with speech holes, is equal to the distance between the middle points of the middle head, the radius of the second arc, with the chains at the midpoint of the middle mouth, or 14% of the first radius, and the second point, located on one line with the first, is determined by the intersection of the perpendicular from the middle mouth "middle head, and cavity, proh d conductive wall through apertures with hearing. 2. The device according to claim 1, characterized in that, in order to align the frequency characteristics of the transmission curves for speech and hearing, the internal volumes of the auditory and speech parts are made in the form of Helmholtz resonators formed by the internal surfaces of the walls with auditory and speech holes and one from the planes of the auditory and speech capsules. 3. The device according to claim 1, characterized in that one of the walls of the Helmholtz resonator is made in the form of acoustic resistance from metal ceramics connected to a speech capsule. 4. Device on PP. 1-3, characterized in that the acoustic impedance height is 5-20 cross sections of the cermet grains. 5. The device according to claim 1, characterized in that, in order to reduce acoustic feedback and reverse sound permeability, both parts of the housing have transverse ribs. 6. The device according to claim 1, characterized in that the cross section of the handle of the handset houses the circuit of the speech and auditory signals. 7. The device according to claim 1, characterized in that, in order to achieve soundproofing, both parts of the housing have a number of wedge joints. 8. The device according to claim 1, characterized in that it has constipation with latches.

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