God using an audible voice to communicate

Scripture references

Acts 10:13–15 (ASV 1901)

13And there came a voice to him, Rise, Peter; kill and eat. 14But Peter said, Not so, Lord; for I have never eaten anything that is common and unclean. 15And a voice came unto him again the second time, What God hath cleansed, make not thou common.

Acts 11:7–9 (ASV 1901)

7And I heard also a voice saying unto me, Rise, Peter; kill and eat. 8But I said, Not so, Lord: for nothing common or unclean hath ever entered into my mouth. 9But a voice answered the second time out of heaven, What God hath cleansed, make not thou common.

Stories

Arlene Peters, with her husband Dave, was a very content missionary in Bogota, Columbia. But God had told her husband that He was calling them to Brazil. Arlene did not agree...until she heard God's voice clearly.
Revati was a Hindu, but while performing her puja one day, a voice came to her saying: ‘I am the way, the truth, and the life: no man cometh unto the Father but by me.’ A few days after this experience, Revati denounced Hinduism and embraced Christ.
When Esther was faced with the daunting challenge of having to encounter an Islamic scholar shortly after giving her life to Christ, she was terrified. However, she fasted and prayed to God, the Lord answered through a voice that encouraged her and pointed her to the scripture verse in Jeremiah 1:4-8, assuring that this was His plan for her. She felt peace.
In a dream, God revealed to Mathilda Wrede that she was to work in prison ministry. She was uncertain that the dream really meant that for her, so the next morning He spoke to her audibly while we walked up and down the beach. Mathilda Wrede devoted her life to prison ministry.
Lolita's faith was strengthened when she listened to the voice of the Lord and safely made it out of a burning building.
Taas had just become a Christian and was reading his Bible for the first time when he suddenly he was overcome by the weight of his past as a religious zealot and murderer. But as he struggled with the weight of his wickedness, the Lord spoke clearly to him, “Even that, I have forgiven.”
When the Holy Spirit told Rees Howells that a dying man would live, he did not communicate it with the certainty of faith. The Lord confronted him that night, and he returned the next day to communicate the message with conviction. It was a severe test of faith for Rees Howells, yet he believed God, and the man was healed.
In a dream, Yun meets a young man who invites him to come share the gospel in his village. The next day Yun found the exact man he saw in his dream was waiting for him and spoke the same message as in the dream.
Pramana's life was in ruin; he was not in loving terms with his wife or kids and even his crops and livestock were yielding nothing. One night he heard a voice tell him to "Find Jesus, find the gospel," with detailed instructions on where and how to find Him. The very next day, Pramana embarked on the journey that forever changed his life!
At several times, an Islamic background man hears the voice of Jesus saying, "I am the Way, the Truth, and the Life". Eventually, he yields and becomes a Christian.
Locked away in solitary confinement and nearing the point of "madness and despair", Harlan Popov hears clearly, the comforting and assuring words of Jesus.
Harlan Popov hears God's voice and experiences the assurance of His presence while in captivity.
Ten days into his arrest and torture, Harlan Popov began to think that God had abandoned him. But in the very same moment he heard the voice of God clear, and distinct, infusing him with great strength.
God saved Vanya and a sergeant's lives by causing a minor delay while they were traveling. They discovered several moments later that there's been a grisly accident with casualties; they would have died if not for the delay.