Yes, two sounds with the same frequency and amplitude can still sound different. The perception of sound involves several factors beyond just frequency and amplitude, including the waveform shape, harmonic content, and spatial characteristics.
Even if two sounds have the same frequency and amplitude, they can differ in their waveform shape. For example, one sound may have a smooth sine wave shape, while the other may have a complex waveform with multiple harmonics. These differences in waveform shape can result in perceptual distinctions such as timbre, which refers to the unique quality or tone color of a sound.
Additionally, spatial characteristics can play a role in how sounds are perceived. The location of the sound source, the presence of reflections or reverberation, and other spatial cues can influence our perception of sound. Two sounds with the same frequency and amplitude but different spatial characteristics, such as one coming from the left and the other from the right, can create a sense of directionality or spatial separation.
Furthermore, psychoacoustic factors can contribute to perceived differences even when the physical properties of the sounds are the same. Factors like individual hearing sensitivity, auditory processing, and cognitive factors can influence how we perceive and differentiate sounds.
In summary, while frequency and amplitude are important factors in sound perception, other factors such as waveform shape, spatial characteristics, and psychoacoustic factors can contribute to the perception of differences between two sounds with the same frequency and amplitude.