Apparatus, method and computer program for providing an acoustic output signal using an earpiece

1. An apparatus comprising: a loudspeaker configured to convert an electrical input signal into an acoustic output signal; a connecting portion configured to interchangeably connect to either a first adapter or a second adapter where the first adapter is configured to fit in a user's ear canal and the second adapter is configured to fit to a user's concha; and a regulator for regulating sound pressure level created by the acoustic output signal at an ear drum of the user in dependence on whether the first adapter or the second adapter is connected to the connecting portion; wherein the regulator includes or is coupled to a detector for automatically detecting whether the first adapter or the second adapter is connected to the connecting portion; and in response to the detection the regulator is configured to filter the electrical input signal provided to the loudspeaker to control the acoustic output signal provided by the loudspeaker in dependence on whether the first adapter or the second adapter is connected to the connecting portion.

2. An apparatus as claimed in claim 1 wherein the filter reduces the amplitude of low frequency components of the acoustic output signal.

3. An apparatus as claimed in claim 1 wherein the filtered acoustic output signal prevents injury to a user, from excessive sound pressure level caused by the acoustic output signal, when the first adapter is connected to the connecting portion.

4. An apparatus as claimed in claim 1 wherein the regulator comprises an aperture which is not sealed when the first adapter is connected to the connecting portion.

5. An apparatus as claimed in claim 1 where the connecting portion is configured to enable a user to interchange between the first and second adapters.

6. An apparatus as claimed in claim 1 wherein the connecting portion is configured to connect to one of a plurality of different adapters including at least the first adapter, the second adapter and a third adapter.

7. A method comprising: converting an electrical input signal into an acoustic output signal; connecting, either a first adapter or a second adapter where the first adapter is configured to fit in a user's ear canal and the second adapter is configured to fit to a user's concha; regulating sound pressure level created by the acoustic output signal at an ear drum of the user in dependence on whether the first adapter or the second adapter is connected to the connecting portion; automatically detecting whether the first adapter or the second adapter is connected to the connecting portion; and filtering, in response to detecting that the first adapter is connected, the electrical input signal provided to the loudspeaker to control the acoustic output signal provided by the loudspeaker.

8. A method as claimed in claim 7 wherein the filtering reduces the amplitude of low frequency components of the acoustic output signal.

9. A method as claimed in claim 7 wherein the filtered acoustic output signal prevents injury to a user, from excessive sound pressure level caused by the acoustic output signal, when the first adapter is connected to the connecting portion.

10. A method as claimed in claim 7 comprising regulating the sound pressure level created by the acoustic output signal at an ear drum of the user by opening an aperture when the first adapter is connected.

11. A computer program comprising computer program instructions stored on a non-transitory computer-readable storage medium and configured to control an apparatus, the program instructions providing, when loaded into a processor;

means for automatically determining whether a first adapter or a second adapter is connected to the apparatus where the first adapter is configured to fit in a user's ear canal and the second adapter is configured to fit to a user's concha;

means for regulating sound pressure level created by an acoustic output signal at an ear drum of the user in dependence on whether the first adapter or the second adapter is connected to the apparatus; and

means for filtering, in response to determining that the first adapter is connected, an electrical input signal provided to a loudspeaker to control the acoustic output signal as generated by the loudspeaker.

12. A computer program comprising program instructions stored on a non-transitory computer-readable storage medium for causing a computer to perform the method of claim 7 .

13. A non-transitory computer-readable storage medium for storing program instructions from which an electromagnetic carrier signal is generated for carrying and executing the computer program as claimed in claim 11 .

14. A non-transitory computer-readable storage medium encoded with instructions that, when executed by a processor, perform the method as claimed in claim 7 .

15. An apparatus as claimed in claim 4 wherein the aperture is sealed when the second adapter is connected to the connecting portion.