Frequency sensing and magnification of portable device output

An apparatus including:

• an object having an impulse response to an acoustic signal;
• a first device positioned on the object having a resonant frequency, the first device including an acoustic signal emitter and a second signal emitter;
• a second device positioned on the object, the second device including an acoustic signal receiver and a second signal receiver;
• the second signal emitter and the second signal receiver being disposed to transmit and receive a signal, respectively, including information describing the acoustic signal;
• one or more of the first device and the second device including a processor and instructions interpretable by the processor to determine one or more characteristics of the impulse response based on a comparison of the signal to the acoustic signal.

An apparatus including:

• a device acoustically coupleable to an object disposed proximate to the device, the device including:
• an acoustic signal receiver;
• a processor and instructions interpretable by the processor to define a plurality of user input regions with respect to a surface of the object;
• the instructions interpretable by the processor to determine a particular region receiving a physical impulse, the determination based on a received acoustic signal received through the object and an impulse response of the object;
• wherein the acoustic signal has a center frequency near a resonant frequency, the resonant frequency being defined in response to the impulse response;
• the instructions interpretable by the processor to direct the device to perform an action associated with the particular region in response to the physical impulse.

An apparatus including:

• a device acoustically coupleable to an object separate from the device, the device including:
• an acoustic signal receiver;
• a processor and instructions interpretable by the processor to define one or more regions with respect to a surface of the object;
• the instructions interpretable by the processor to determine a particular region receiving one or more physical impulses, the determination based on a received acoustic signal received through the object and an impulse response of the object;
• wherein the acoustic signal includes a resonant frequency, the resonant frequency being defined in response to the impulse response;
• the instructions interpretable by the processor to direct the device to perform an action associated with the particular region in response to a number of the one or more physical impulses.

A method, including steps of:

• emitting a first signal from a first device, the first signal including one or more acoustic components, the first device acoustically coupled to an object having a resonant frequency;
• emitting a second signal from the first device, the second signal including information describing the acoustic signal;
• receiving, by a second device, the first signal and the second signal, the first signal being mediated by an impulse response of the object;
• determining, by one or more of the first device and the second device, characteristics of the impulse response, based on a comparison between the first signal and the second signal.