1. The material of the drum paper of the fire broadcast ceiling speaker (ERS), the softness and hardness of the elastic wave, and the number of turns of the voice coil.
The difference between Santoprene and foam edge: Santoprene: Thermoplastic rubber is a series of high-performance elastomers. It not only has vulcanized rubber-like properties (such as flexibility and compression set), but also has the ease of processing of thermoplastics. . The overall cost and performance are about between plastic and thermosetting rubber.
Bubble edge: It is convenient to adjust the density and thickness of the bubble edge. Therefore, it is easy to adjust the low-frequency parameters such as the compliance of the speaker during design. Usually (with special exceptions) the sensitivity is higher than that of the rubber edge, but lower than that of the cloth edge, and the bass is full and soft. .
①Plastic, iron, and aluminum ceiling speakers for fire-fighting broadcasting: Yiting Speaker Factory adopts a special design by Danish masters: multi-pole high-intensity magnetic design; provides enough energy.
② Fire broadcast ceiling speaker CONEX, ordinary, plucked: It is made of American DuPont cloth and processed with a special process, which provides flexibility to support large dynamics (amplitude), so that it has excellent stability and minimal distortion.
③The voice coil of the ceiling speaker for fire broadcasting is resistant to high temperature: it adopts imported materials and conductors with strong conductivity, so that the impedance of the voice coil is accurate and the inductance is extremely low.
④ Fire radio ceiling speaker cone (ERS), carcass, edge (material): paper cone: paper cone is easy to integrate with other materials, so there are several types of glued paper cones, compressed paper cones, etc. Although the cost of paper cones Low, but its sound performance is good, and its sensitivity is high, so the paper cone is the most widely used.
Bulletproof cloth basin: The speaker of the bulletproof cloth basin has a wide range of frequency response, which is suitable for music lovers who like strong bass, but its cost is high and the production is difficult.
Wool basin: The ceiling speakers of fire broadcasting use wool as the sound basin, which has good flexibility and is good at expressing light music.
Metal Basin: Fire broadcast ceiling speakers are added with metal elements such as aluminum and magnesium, which have strong rigidity and instant explosive power, suitable for dynamic and powerful music.
Ceramic basin: Fire radio ceiling speakers are good at expressing human voice and classical music, with delicate timbre and good dynamic performance.
PP basin: The polypropylene basin of the ceiling loudspeaker for fire broadcasting has low distortion and is good at expressing all kinds of music, and the cost is high.
The drum paper is mainly composed of three parts: the body (BODY), the side (SIDE) and the gasket. The gasket is an auxiliary setting part. Some different types of drum paper can be without this part, which is mainly determined according to customer requirements.
Fire radio ceiling horn drum paper is divided into full paper drum paper, composite drum paper, Mylar drum paper, etc. according to different materials. The drum paper has three characteristics:
(1) The weight should be light;
(2) The coefficient of elasticity should be high;
(3) There must be appropriate mechanical losses.
⑤ Fire radio ceiling speaker wireless speaker design: such as small bluetooth speaker: round iron basin frame (ERS) rubber edge paper cone 16-core internal magnetic full-frequency speaker, frequency range 150Hz~20KHz, sensitivity reaches 83dB, sound quality is full and clear;