INDUSTRY COMPONENT

Diaphragm (Cone)

A cone-shaped diaphragm that converts electrical signals into sound waves in speaker drivers through mechanical vibration.

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Component Specifications

Definition
The diaphragm (cone) is the primary moving component in a speaker driver, responsible for generating sound by vibrating in response to electrical signals from the amplifier. Its conical geometry optimizes rigidity, weight distribution, and piston-like motion to accurately reproduce audio frequencies while minimizing distortion. The cone's shape, material properties, and suspension system determine key acoustic parameters like frequency response, efficiency, and transient behavior.
Working Principle
The diaphragm operates on the electrodynamic principle: when an alternating current passes through the voice coil attached to the cone's apex, it interacts with the permanent magnet's magnetic field, creating mechanical force. This force causes the cone to oscillate back and forth, displacing air molecules to produce sound waves. The cone's geometry ensures uniform radiation and controlled breakup modes at high frequencies.
Materials
Common materials include: 1. Paper pulp (treated with resins for moisture resistance), 2. Polypropylene (injection-molded for consistency), 3. Aluminum or titanium alloys (for high stiffness-to-weight ratio), 4. Composite materials like carbon fiber-reinforced polymers. Material selection balances density, Young's modulus, internal damping, and environmental stability.
Technical Parameters
  • Mass 0.5-50 g
  • Diameter 25-400 mm
  • Compliance 0.1-2.0 mm/N
  • Cone Angle 60-120 degrees
  • Maximum Excursion ±1-10 mm
  • Resonant Frequency 20-2000 Hz
Standards
IEC 60268-5, ANSI/CEA-2034

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Diaphragm (Cone).

speaker cone diaphragm design acoustic transducer driver component cone materials speaker manufacturing audio engineering Diaphragm (Cone) Diaphragm (Cone) in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Speaker Driver

The electroacoustic transducer that converts electrical audio signals into sound waves within a speaker system.

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Engineering Analysis

Risks & Mitigation
  • Resonance-induced distortion
  • Material fatigue under high excursion
  • Environmental degradation (humidity/temperature)
  • Geometric deformation during assembly
FMEA Triads
Trigger: Improper material selection or manufacturing defects
Failure: Cone breakup at lower frequencies causing harmonic distortion
Mitigation: Implement strict material testing (e.g., DMA analysis) and automated optical inspection during production
Trigger: Voice coil misalignment or overheating
Failure: Thermal deformation leading to rubbing or permanent cone damage
Mitigation: Design with thermal compensation features and precision alignment fixtures during assembly

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter: ±0.1 mm, Concentricity: <0.05 mm TIR, Mass variation: ±2%
Test Method
Laser vibrometry for vibration analysis, acoustic measurement in anechoic chamber per IEC 60268-5, environmental cycling tests

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

Why is the cone shape preferred over flat diaphragms in speakers?

The conical geometry provides optimal rigidity-to-weight ratio, reduces standing waves, and improves directivity control. It allows for progressive breakup modes at high frequencies rather than abrupt resonances, resulting in smoother frequency response and lower distortion.

How does material choice affect speaker performance?

Material properties directly influence key parameters: lightweight materials (e.g., polypropylene) improve high-frequency response and efficiency, while stiff materials (e.g., metal composites) enhance midrange clarity and power handling. Internal damping characteristics affect transient response and harmonic distortion.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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