Providing enhanced haptic feedback effects

A method, comprising:

• having a first frequency at which to output a tactile sensation;
• determining if the first frequency is below a predetermined threshold frequency, if the first frequency is below the predetermined threshold frequency;
• determining a second frequency higher than the first frequency;
• wherein the second frequency is at or near a resonant frequency of an actuator;
• and
• combining a waveform having the first frequency and a waveform having the second frequency to produce a signal configured to cause a tactile sensation at the second frequency that conveys a tactile sensation at the first frequency;
• and if the first frequency is not below the predetermined threshold frequency:
• producing a signal based on the first frequency, the signal configured to cause a tactile sensation.

An apparatus, comprising:

• a controller configured to provide a signal, the signal configured to cause a tactile sensation, the controller configured to receive an indication of a first frequency and output the signal at a second frequency based on the received indication, the second frequency being higher than the first frequency, the controller configured to repeat the output of the signal at a period substantially corresponding to the first frequency;
• an actuator configured to output the tactile sensation based on the signal;
• a mass coupled to the actuator, the signal being configured to cause the mass to move;
• and
• at least one sensor being configured to sense a movement of the mass, the controller being configured to modify the signal based on the movement of the mass.

A computer-readable medium comprising code representing instructions to cause a computer to:

• having a first frequency at which to output a tactile sensation;
• determining a second frequency higher than the first frequency;
• wherein the second frequency is at or near a resonant frequency of an actuator;
• and
• combining a waveform having the first frequency and a waveform having the second frequency to produce a signal configured to cause a tactile sensation.

A computer-readable medium comprising code representing instructions to cause a processor to:

• receive an indication of a first frequency at which to output a tactile sensation;
• determine a second frequency at which to output a greater tactile sensation, the second frequency higher than the first frequency;
• wherein the second frequency is at or near a resonant frequency of an actuator;
• and
• combine a waveform having the first frequency and a waveform having the second frequency to produce a signal configured to cause a tactile sensation.

A processor-readable medium comprising code representing instructions to cause a processor to:

• having a first frequency at which to output a tactile sensation;
• determine a second frequency higher than the first frequency;
• wherein the second frequency is at or near a resonant frequency of an actuator;
• and
• combine a waveform having the first frequency and a waveform having the second frequency to produce a signal configured to cause a tactile sensation.

A method, comprising:

• low-pass filtering each waveform from a plurality of waveforms to produce a plurality of low-passed waveforms, each low-passed waveform from the plurality of low-passed waveforms being uniquely associated with each waveform from the plurality of waveforms, the plurality of waveforms including a first waveform that is uniquely associated with a first low-passed waveform from the plurality of low-passed waveforms;
• high-pass filtering each waveform from the plurality of waveforms to produce a plurality of high-passed waveforms, each high-passed waveform from the plurality of high-passed waveforms being uniquely associated with each waveform from the plurality of waveforms, the first waveform being uniquely associated with a first high-passed waveform from the plurality of high-passed waveforms;
• producing a first envelope waveform by summing the plurality of low-passed waveforms except for the first low-passed waveform, the first envelope waveform being uniquely associated with the first high-passed waveform;
• and
• multiplying the first high-passed waveform by the first envelope waveform to produce a first product waveform.