Control method of sound producing, sound producing apparatus, and portable apparatus

A control method of sound producing for a portable device, comprising:

• (a) generating a first detected parameter indicating a detected excursion of a speaker of the portable device;
• (b) generating a second audio signal based on a first audio signal, wherein the second audio signal is generated selectively by compensation according to at least the first detected parameter;
• and
• (c) determining a gain value according to at least the first detected parameter and generating a third audio signal based on the second audio signal according to the gain value.

A portable apparatus, comprising:

• a processing unit, wherein the processing unit outputs an audio input signal;
• a speaker;
• an amplifier, coupled to the speaker;
• and
• a control apparatus, coupled between the processing unit and the amplifier, for driving the speaker through the amplifier according to a third audio signal, comprising:
• a feedback unit, coupled to the speaker, for generating a first detected parameter indicating a detected excursion of the speaker;
• a compensation unit, for generating a second audio signal based on the audio input signal, wherein the second audio signal is generated selectively by compensation according to the first detected parameter;
• and
• a gain unit, coupled to the compensation unit and the feedback unit, for determining a gain value according to the first detected parameter and generating the third audio signal based on the second audio signal according to the gain value.