A speaker, commonly known as a speaker, is a device that converts electrical signals into sound. It is a key component in the audio system, responsible for producing sound, allowing us to hear music, voice, and other audio content. The working principle of the speaker is based on electromagnetic induction and the movement of the vibrating diaphragm.
working principle:
Electrical signal conversion: When an audio signal passes through the voice coil of a speaker (a coil wrapped around a magnet), a changing magnetic field is generated.
Magnetic field interaction: This changing magnetic field interacts with the permanent magnet inside the speaker, producing a push-pull effect.
Vibration diaphragm: This push-pull effect causes the vibration diaphragm (usually made of paper, polymer, or other materials) in the front of the speaker to vibrate back and forth.
Sound generation: The vibration of the vibrating diaphragm drives the surrounding air molecules, producing sound waves, and ultimately forming a sound that we can hear.
Structural composition:
The basic structure of a speaker includes:
Diaphragm: The main component responsible for producing sound, usually conical in shape.
Voice coil: Connected to a vibrating diaphragm, it generates a magnetic field when current passes through.
Magnet: Provides a stable magnetic field that interacts with the magnetic field of the voice coil.
Suspension system: including edge and center covers, supporting the vibrating diaphragm and maintaining its correct motion trajectory.
Enclosures: Enclosed speaker units that affect the output and quality of sound.
Common types:
Common types of speakers include:
Dynamic Speaker: The most common type based on the above working principle.
Electrostatic Speaker: Using electrostatic force to drive thin film vibration.
Planar Magnetic Speaker: Similar to an electrostatic speaker, but uses a magnetic field instead of electrostatic force.
Piezoelectric Speaker: produces sound using the piezoelectric effect.
Horn Speaker: Amplifies sound using horn shapes and is commonly used for outdoor broadcasting.
Application:
Speakers are widely used in various occasions, including:
Home audio system
Car audio
Professional audio (such as concerts, theaters)
Public Address System
TV and cinema sound system
Personal audio devices (such as headphones)
Selection and Use:
When selecting speakers, the following factors need to be considered:
Frequency response: The range of sound frequencies that a speaker can produce.
Sensitivity: The efficiency of a speaker in converting electrical energy into sound energy.
Power processing capability: The maximum power that the speaker can withstand.
Impedance: The resistance of a speaker to current, usually measured in ohms (Ω).
Box type: Open or closed box, as well as the size and design of the box, can affect sound quality.
Proper use of speakers, including reasonable matching of amplifiers and speakers, appropriate placement and angle, and good room acoustic processing, are crucial for achieving the best auditory experience.
A speaker, commonly known as a speaker, is a device that converts electrical signals into sound. It is a key component in the audio system, responsible for producing sound, allowing us to hear music, voice, and other audio content. The working principle of the speaker is based on electromagnetic induction and the movement of the vibrating diaphragm.
working principle:
Electrical signal conversion: When an audio signal passes through the voice coil of a speaker (a coil wrapped around a magnet), a changing magnetic field is generated.
Magnetic field interaction: This changing magnetic field interacts with the permanent magnet inside the speaker, producing a push-pull effect.
Vibration diaphragm: This push-pull effect causes the vibration diaphragm (usually made of paper, polymer, or other materials) in the front of the speaker to vibrate back and forth.
Sound generation: The vibration of the vibrating diaphragm drives the surrounding air molecules, producing sound waves, and ultimately forming a sound that we can hear.
Structural composition:
The basic structure of a speaker includes:
Diaphragm: The main component responsible for producing sound, usually conical in shape.
Voice coil: Connected to a vibrating diaphragm, it generates a magnetic field when current passes through.
Magnet: Provides a stable magnetic field that interacts with the magnetic field of the voice coil.
Suspension system: including edge and center covers, supporting the vibrating diaphragm and maintaining its correct motion trajectory.
Enclosures: Enclosed speaker units that affect the output and quality of sound.
Common types:
Common types of speakers include:
Dynamic Speaker: The most common type based on the above working principle.
Electrostatic Speaker: Using electrostatic force to drive thin film vibration.
Planar Magnetic Speaker: Similar to an electrostatic speaker, but uses a magnetic field instead of electrostatic force.
Piezoelectric Speaker: produces sound using the piezoelectric effect.
Horn Speaker: Amplifies sound using horn shapes and is commonly used for outdoor broadcasting.
Application:
Speakers are widely used in various occasions, including:
Home audio system
Car audio
Professional audio (such as concerts, theaters)
Public Address System
TV and cinema sound system
Personal audio devices (such as headphones)
Selection and Use:
When selecting speakers, the following factors need to be considered:
Frequency response: The range of sound frequencies that a speaker can produce.
Sensitivity: The efficiency of a speaker in converting electrical energy into sound energy.
Power processing capability: The maximum power that the speaker can withstand.
Impedance: The resistance of a speaker to current, usually measured in ohms (Ω).
Box type: Open or closed box, as well as the size and design of the box, can affect sound quality.
Proper use of speakers, including reasonable matching of amplifiers and speakers, appropriate placement and angle, and good room acoustic processing, are crucial for achieving the best auditory experience.
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