Electro-acoustic Component Parameters
Electro-acoustic Components
Electro-acoustic components are devices capable of converting audio electrical signals into sound signals, or sound signals into audio electrical signals. For example, a loudspeaker is an electro-acoustic component that converts audio signals into sound signals, whereas a microphone converts sound signals into audio signals. Phonograph cartridges, headphones, buzzers, and sounders also fall into the category of electro-acoustic components.
Electro-acoustic Component Parameters
(1) Nominal Power: The electrical power input during continuous normal operation. Common power ratings include 0.1W, 0.25W, 0.5W, 1W, 3W, 5W, 10W, 50W, 100W, and 200W.
The maximum power a loudspeaker can withstand is typically 1.5 to 2 times its rated power.
(2) Nominal Impedance: The AC impedance value of the loudspeaker at rated power. Common values are 4Ω, 8Ω, 16Ω, and 32Ω. Numerically, this is approximately 1.2 to 1.3 times the DC resistance of the loudspeaker's voice coil.
(3) Frequency Response Characteristics: The characteristic describing how the loudspeaker's output sound pressure varies with the frequency of the input signal. This is determined by applying audio signals of constant amplitude but varying frequencies to the loudspeaker and measuring the resulting output sound pressure.
(4) Sensitivity: The sound pressure P (in Pascals) generated on the reference axis at a distance of 1 meter from the reference point when a noise signal voltage—equivalent to 1W of electrical power at the rated impedance—is applied to the loudspeaker. Sensitivity reflects the efficiency of the loudspeaker's electro-acoustic conversion.
(5) Distortion: Harmonic Distortion: This occurs when the sound produced by the loudspeaker differs from the original sound; specifically, higher-order harmonics of the original signal frequency appear in the reproduced sound. Intermodulation distortion: Higher-order harmonics interact with the original audio components, generating new frequency components.
(6) Directivity characteristics: The distribution of radiated sound pressure in various directions in space when a loudspeaker emits sound.
Electro-acoustic components are devices capable of converting audio electrical signals into sound signals, or sound signals into audio electrical signals. For example, a loudspeaker is an electro-acoustic component that converts audio signals into sound signals, whereas a microphone converts sound signals into audio signals. Phonograph cartridges, headphones, buzzers, and sounders also fall into the category of electro-acoustic components.
Electro-acoustic Component Parameters
(1) Nominal Power: The electrical power input during continuous normal operation. Common power ratings include 0.1W, 0.25W, 0.5W, 1W, 3W, 5W, 10W, 50W, 100W, and 200W.
The maximum power a loudspeaker can withstand is typically 1.5 to 2 times its rated power.
(2) Nominal Impedance: The AC impedance value of the loudspeaker at rated power. Common values are 4Ω, 8Ω, 16Ω, and 32Ω. Numerically, this is approximately 1.2 to 1.3 times the DC resistance of the loudspeaker's voice coil.
(3) Frequency Response Characteristics: The characteristic describing how the loudspeaker's output sound pressure varies with the frequency of the input signal. This is determined by applying audio signals of constant amplitude but varying frequencies to the loudspeaker and measuring the resulting output sound pressure.
(4) Sensitivity: The sound pressure P (in Pascals) generated on the reference axis at a distance of 1 meter from the reference point when a noise signal voltage—equivalent to 1W of electrical power at the rated impedance—is applied to the loudspeaker. Sensitivity reflects the efficiency of the loudspeaker's electro-acoustic conversion.
(5) Distortion: Harmonic Distortion: This occurs when the sound produced by the loudspeaker differs from the original sound; specifically, higher-order harmonics of the original signal frequency appear in the reproduced sound. Intermodulation distortion: Higher-order harmonics interact with the original audio components, generating new frequency components.
(6) Directivity characteristics: The distribution of radiated sound pressure in various directions in space when a loudspeaker emits sound.
Sep 16,2026