Dropping an iPhone from a height of 1.5 meters (about 4.9 feet) can potentially cause damage to various components, including the internal speakers or earpiece. The earpiece, which is the component that allows you to hear phone calls and other audio during calls, could indeed be affected by a drop. Depending on the nature and severity of the impact, it might suffer damage that leads to a reduction in sound quality or volume loss.

If you've dropped your iPhone and are experiencing issues with the earpiece, such as reduced volume or poor sound quality, it's possible that the internal components have been damaged. In such cases, it's advisable to have the device inspected and, if necessary, repaired by a qualified technician or at an Apple service center. They can assess the damage and provide you with an appropriate solution, which might include repairing or replacing the affected components.

Remember that repairing or replacing internal components of your iPhone should be performed by professionals to avoid further damage and to maintain the device's warranty, if applicable.