Method of generating prediction curve for acoustic load of loudspeaker

1. A method of generating a prediction curve for acoustic load of a loudspeaker, wherein the loudspeaker comprises a horn and a diaphragm, one end of the horn is defined as a throat, an outside of an other end of the horn is free space, and a sound wave from the diaphragm passes through the throat and gradually diffuses to the free space outside the other end of the horn, the method comprising:

defining a cross section or a surface, wherein the cross section is a cross section of the throat, and the surface is a surface of the diaphragm;

calculating an integration of a sound pressure value of the cross section or the surface to obtain an effective sound pressure, or calculating an integration of acoustic energy of the cross section or the surface to obtain a radiated sound power; and

generating the prediction curve according to the effective sound pressure or the radiated sound power, wherein the prediction curve is an acoustic impedance curve or an acoustic power curve,

wherein the acoustic impedance curve is obtained by:

calculating an integration of the sound pressure value of the cross section or the surface to obtain a sound pressure integral value;

dividing the sound pressure integral value by an area of the cross section or the surface to obtain the effective sound pressure;

calculating an integration of a particle velocity on the cross section or the surface to obtain a volume velocity; and

generating the acoustic impedance curve according to the effective sound pressure and the volume velocity, and

wherein the acoustic power curve is obtained by:

calculating acoustic energy passing through the cross section or the surface in a unit of time; and

calculating an integration of the acoustic energy of the cross section or the surface to generate the acoustic power curve.

2. The method according to claim 1 , wherein the loudspeaker comprises a phase plug, the phase plug is located between the diaphragm and the throat, the sound wave from the diaphragm reaches the throat after passing through the phase plug and gradually diffuses to the free space outside the other end of the horn, and the cross section may be any cross section between an entrance of the phase plug and an exit of the horn.

3. The method according to claim 1 , wherein the acoustic impedance curve comprises an acoustic resistance curve and an acoustic reactance curve, the method further comprising:

performing a real number operation on the acoustic impedance curve to generate the acoustic resistance curve.

4. The method according to claim 1 , wherein the acoustic impedance curve comprises an acoustic resistance curve and an acoustic reactance curve, the method further comprising:

performing an imaginary number operation on the acoustic impedance curve to generate the acoustic reactance curve.

5. The method according to claim 1 , further comprising:

providing an input voltage value and a direct current impedance; and

dividing a square of the input voltage value by the direct current impedance to obtain a numeric value of an input electrical power.

6. The method according to claim 5 , further comprising:

extracting a maximum value of the acoustic power curve; and

comparing the maximum value with the numeric value of the input electrical power to obtain an electro-acoustic conversion efficiency.

7. A method of generating a prediction curve for acoustic load of a loudspeaker, wherein the loudspeaker comprises a diaphragm, the method comprising:

defining a surface, wherein the surface is a surface of the diaphragm;

calculating an integration of a sound pressure value or acoustic energy of the surface to obtain an effective sound pressure or a radiated sound power; and

generating the prediction curve according to the effective sound pressure or the radiated sound power, wherein the prediction curve is an acoustic impedance curve or an acoustic power curve,

wherein the acoustic impedance curve is obtained by:

calculating an integration of the sound pressure value of the surface to obtain a sound pressure integral value;

dividing the sound pressure integral value by an area of the surface to obtain the effective sound pressure;

calculating an integration of a particle velocity on the surface to obtain a volume velocity; and

generating the acoustic impedance curve according to the effective sound pressure and the volume velocity, and

wherein the acoustic power curve is obtained by:

calculating acoustic energy passing through the surface in a unit of time; and

calculating an integration of the acoustic energy of the surface to generate the acoustic rower curve.

8. The method according to claim 7 , wherein said calculating the integration of the sound pressure value of the cross section or the surface to obtain an effective sound pressure comprises:

calculating an integration of the sound pressure value of the cross section or the surface to obtain a sound pressure integral value;

dividing the sound pressure integral value by an area of the cross section or the surface to obtain the effective sound pressure;

calculating an integration of a particle velocity on the cross section or the surface to obtain a volume velocity; and

generating the acoustic impedance curve according to the effective sound pressure and the volume velocity.